Merge pull request #189 from thomasleveil/midnight_in_paris

WIP: Midnight in paris - is this a bug ?

.coveragerc

@@ -0,0 +1,12 @@
+[run]
+branch = True
+source =
+    maya
+
+[paths]
+source =
+   src
+   .tox/*/site-packages
+
+[report]
+show_missing = True

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at tuxtimo@gmail.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

.github/CONTRIBUTING.md

@@ -0,0 +1,45 @@
+# Contributing
+
+Thank you for helping maya to get a better piece of software.
+
+## Support
+
+If you have any questions regarding the usage of maya please use the Question Issue Template or ask on [StackOverflow](https://stackoverflow.com).
+
+## Reporting Issues / Proposing Features
+
+Before you submit an Issue or proposing a Feature check the existing Issues in order to avoid duplicates. <br>
+Please make sure you provide enough information to work on your submitted Issue or proposed Feature:
+
+* Which version of maya are you using?
+* Which version of python are you using?
+* On which platform are you running maya?
+
+Make sure to use the GitHub Template when reporting an issue.
+
+## Pull Requests
+
+We are very happy to receive Pull Requests considering:
+
+* Style Guide. Follow the rules of [PEP8](http://legacy.python.org/dev/peps/pep-0008/), but you may ignore *too-long-lines* and similar warnings. There is a *pylintrc* file for more information.
+* Tests. If our change affects python code inside the source code directory, please make sure your code is covered by an automated test case.
+
+### Testing
+
+To test the maya source code against all supported python versions you should use *tox*:
+
+```bash
+cd ~/work/maya
+pip install tox
+tox
+```
+
+However, if you want to test your code on certain circumstances you can create a *virtualenv*:
+
+```
+cd ~/work/maya
+virtualenv env
+source env/bin/activate
+pip install -e '.[dev]'
+commands = coverage run --parallel -m pytest -s --failed-first
+```

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,42 @@
+---
+name: Bug Report
+about: Create a bug report to help us improve maya
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Important notices**
+Before you add a new report, we ask you kindly to acknowledge the following:
+
+[-] I have read the contributing guide lines at https://github.com/timofurrer/maya/blob/master/.github/CONTRIBUTING.md
+
+[-] I have read and respect the code of conduct at https://github.com/timofurrer/maya/blob/master/.github/CODE_OF_CONDUCT.md
+
+[-] I have searched the existing issues and I'm convinced that mine is new.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Environment and Version**
+* OS (incl. terminal and shell used): ...
+* Python Version: ...
+* maya Version: ...
+* Your timezone: ...
+
+**To Reproduce**
+A clear and concise description of steps to reproduce the behavior
+you are experiencing.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Relevant log files**
+If applicable, information from log files supporting your claim.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,29 @@
+---
+name: Feature Request
+about: Suggest an idea for a new feature or enhancement for maya
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Important notices**
+Before you add a new request, we ask you kindly to acknowledge the following:
+
+[-] I have read the contributing guide lines at https://github.com/timofurrer/maya/blob/master/.github/CONTRIBUTING.md
+
+[-] I have read and respect the code of conduct at https://github.com/timofurrer/maya/blob/master/.github/CODE_OF_CONDUCT.md
+
+[-] I have searched the existing issues and I'm convinced that mine is new.
+
+**Is your Feature Request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the Feature Request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,20 @@
+---
+name: Ask a Question
+about: Ask a Question about maya (Usage, Development, ...)
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Important notices**
+Before you add a new report, we ask you kindly to acknowledge the following:
+
+[-] I have read the contributing guide lines at https://github.com/timofurrer/maya/blob/master/.github/CONTRIBUTING.md
+
+[-] I have read and respect the code of conduct at https://github.com/timofurrer/maya/blob/master/.github/CODE_OF_CONDUCT.md
+
+[-] I have searched the existing issues and I'm convinced that mine is new.
+
+**Ask your Question**
+Ask your question here! If the question is related to a particular environment or behavior please make sure to add some context.

.github/workflows/main.yml

@@ -0,0 +1,79 @@
+name: Continuous Integration and Deployment
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Setup build and test environment
+        run: |
+          python -m pip install --upgrade pip setuptools wheel
+      - name: Build Python Package
+        run: |
+          python -m pip install ".[tests]"
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          flake8 --show-source src/ tests/
+      - name: Check Manifest
+        run: |
+          pip install check-manifest
+          check-manifest
+      - name: Test with pytest
+        run: |
+          coverage run --parallel -m pytest
+      - name: Report code coverage
+        run: |
+          coverage combine
+          coverage report
+          coverage xml
+
+  docs:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: 3.7
+      - name: Setup docs environment
+        run: |
+          python -m pip install ".[docs]"
+      - name: Build documentation with sphinx
+        run: |
+          sphinx-build -W -b html -d doctrees docs/source docs/_build/html
+
+  publish:
+    needs: [build, docs]
+    runs-on: ubuntu-latest
+
+    if: startsWith(github.event.ref, 'refs/tags') && github.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v4.2.0
+        with:
+          python-version: 3.7
+      - name: Build Package
+        run: |
+          python -m pip install --upgrade pip setuptools wheel
+          python setup.py sdist bdist_wheel --universal
+      - name: Publish Package on PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: __token__
+          password: ${{ secrets.pypi_token }}

.gitignore

@@ -0,0 +1,95 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+Pipfile.lock
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# dotenv
+.env
+
+# virtualenv
+.venv/
+venv/
+ENV/
+
+# Spyder project settings
+.spyderproject
+
+# Rope project settings
+.ropeproject
+
+# PyCharm
+.idea/

.pre-commit-config.yaml

@@ -0,0 +1,32 @@
+repos:
+  - repo: https://github.com/ambv/black
+    rev: 19.3b0
+    hooks:
+      - id: black
+        language_version: python3.7
+        # override until resolved: https://github.com/ambv/black/issues/402
+        files: \.pyi?$
+        types: []
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.7.7
+    hooks:
+      - id: flake8
+        language_version: python3.7
+
+  #- repo: https://github.com/asottile/seed-isort-config
+    #rev: v1.9.1
+    #hooks:
+      #- id: seed-isort-config
+
+  #- repo: https://github.com/pre-commit/mirrors-isort
+    #rev: v4.3.20
+    #hooks:
+      #- id: isort
+        #language_version: python3.7
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.2.3
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer

DEMO.ipynb

@@ -0,0 +1,507 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Maya: Datetimes for Humans™"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Datetimes are very frustrating to work with in Python, especially when dealing with different locales on different systems. This library exists to make the simple things much easier, while admitting that time is an illusion (timezones doubly so).\n",
+    "\n",
+    "Datetimes should be interacted with via an API written for humans.\n",
+    "\n",
+    "Maya is mostly built around the headaches and use-cases around parsing datetime data from websites."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Basic Usage of Maya"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import maya"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 34,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaDT epoch=1544809514.491009>"
+      ]
+     },
+     "execution_count": 34,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "maya.now()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 35,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaDT epoch=1544895914.872356>"
+      ]
+     },
+     "execution_count": 35,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tomorrow = maya.when('tomorrow')\n",
+    "tomorrow"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'tomorrow'"
+      ]
+     },
+     "execution_count": 36,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tomorrow.slang_date()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 37,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'in 23 hours'"
+      ]
+     },
+     "execution_count": 37,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tomorrow.slang_time()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 38,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'2018-12-15T17:45:14.872356Z'"
+      ]
+     },
+     "execution_count": 38,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Also: MayaDT.from_iso8601(...)\n",
+    "tomorrow.iso8601()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 39,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'Sat, 15 Dec 2018 17:45:14 GMT'"
+      ]
+     },
+     "execution_count": 39,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Also: MayaDT.from_rfc2822(...)\n",
+    "tomorrow.rfc2822()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 40,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'2018-12-15T17:45:14.8Z'"
+      ]
+     },
+     "execution_count": 40,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Also: MayaDT.from_rfc3339(...)\n",
+    "tomorrow.rfc3339()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 41,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "datetime.datetime(2018, 12, 15, 17, 45, 14, 872356, tzinfo=<UTC>)"
+      ]
+     },
+     "execution_count": 41,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tomorrow.datetime()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 42,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "datetime.datetime(2016, 12, 16, 13, 23, 45, 423992)"
+      ]
+     },
+     "execution_count": 42,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Automatically parse datetime strings and generate naive datetimes.\n",
+    "scraped = '2016-12-16 18:23:45.423992+00:00'\n",
+    "maya.parse(scraped).datetime(to_timezone='US/Eastern', naive=True)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 43,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "rand_day = maya.when('2011-02-07', timezone='US/Eastern')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 44,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaDT epoch=1544809518.275386>"
+      ]
+     },
+     "execution_count": 44,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Maya speaks Python.\n",
+    "from datetime import datetime\n",
+    "\n",
+    "maya.MayaDT.from_datetime(datetime.utcnow())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 45,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaDT epoch=1544809518.0>"
+      ]
+     },
+     "execution_count": 45,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import time\n",
+    "\n",
+    "maya.MayaDT.from_struct(time.gmtime())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 46,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaDT epoch=1544809520.426774>"
+      ]
+     },
+     "execution_count": 46,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "maya.MayaDT(time.time())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 47,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "7"
+      ]
+     },
+     "execution_count": 47,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "rand_day.day"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 48,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "17"
+      ]
+     },
+     "execution_count": 48,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "rand_day.add(days=10).day"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 49,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'UTC'"
+      ]
+     },
+     "execution_count": 49,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Always.\n",
+    "rand_day.timezone"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 50,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<generator object intervals at 0x10c54a308>"
+      ]
+     },
+     "execution_count": 50,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Range of hours in a day:\n",
+    "maya.intervals(start=maya.now(), end=maya.now().add(days=1), interval=60*60)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 51,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'Mon, 21 Feb 1994 03:00:00 GMT'"
+      ]
+     },
+     "execution_count": 51,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# snap modifiers\n",
+    "dt = maya.when('Mon, 21 Feb 1994 21:21:42 GMT')\n",
+    "dt.snap('@d+3h').rfc2822()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Advanced Usage of Maya"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "In addition to timestamps, Maya also includes a wonderfully powerful MayaInterval class, which represents a range of time (e.g. an event). With this class, you can perform a multitude of advanced calendar calculations with finesse and ease.\n",
+    "\n",
+    "For example:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 52,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from maya import MayaInterval"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 53,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Create an event that is one hour long, starting now.\n",
+    "event_start = maya.now()\n",
+    "event_end = event_start.add(hours=1)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 54,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<MayaInterval start=<MayaDT epoch=1544809524.395196> end=<MayaDT epoch=1544813124.395196>>"
+      ]
+     },
+     "execution_count": 54,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "MayaInterval(start=event_start, end=event_end)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "From here, there are a number of methods available to you, which you can use to compare this event to another event."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Do your own experiments here...\n",
+    "\n",
+    "Try `maya` youself by adding your code below and running your own experiments 👇"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import maya\n",
+    "\n",
+    "# your code here\n",
+    "maya."
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

LICENSE

@@ -1,7 +1,21 @@
+The MIT License (MIT)
+
 Copyright (c) 2016 Kenneth Reitz
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MANIFEST.in

@@ -0,0 +1,30 @@
+# Additional package data
+
+# Metadata
+include LICENSE *.md *.rst *.toml *.yml *.yaml
+graft .github
+
+# Jupyter Notebooks
+include *.ipynb
+
+# Stubs
+recursive-include src *.pyi
+
+# Tests
+include tox.ini .coveragerc conftest.py
+recursive-include tests *.py
+
+# Documentation
+include docs/Makefile docs/docutils.conf
+recursive-include docs *.bat
+recursive-include docs *.png
+recursive-include docs *.svg
+recursive-include docs *.py
+recursive-include docs *.rst
+recursive-include docs *.ico
+prune docs/_build
+
+# Just to keep check-manifest happy; on releases those files are gone.
+# Last rule wins!
+exclude changelog.d/*.rst
+include changelog.d/towncrier_template.rst

Makefile

@@ -1,2 +0,0 @@
-tests:
-	pytest test_maya.py

README.rst

@@ -1,5 +1,12 @@
-Maya: Datetime for Humans™
-==========================
+Maya: Datetimes for Humans™
+===========================
+
+.. image:: https://img.shields.io/pypi/v/maya.svg
+    :target: https://pypi.python.org/pypi/maya
+
+.. image:: https://github.com/timofurrer/maya/workflows/Continuous%20Integration%20and%20Deployment/badge.svg
+    :target: https://github.com/timofurrer/maya/actions
+
 
 Datetimes are very frustrating to work with in Python, especially when dealing
 with different locales on different systems. This library exists to make the
@@ -8,6 +15,9 @@ simple things **much** easier, while admitting that time is an illusion
 
 Datetimes should be interacted with via an API written for humans.
 
+Maya is mostly built around the headaches and use-cases around parsing datetime data from websites.
+
+
 ☤ Basic Usage of Maya
 ---------------------
 
@@ -27,11 +37,17 @@ Behold, datetimes for humans!
     >>> tomorrow.slang_time()
     '23 hours from now'
 
+    # Also: MayaDT.from_iso8601(...)
     >>> tomorrow.iso8601()
-    '2016-12-16T15:11:30.263350Z'
+    '2017-02-10T22:17:01.445418Z'
 
-    >>> tomorrrow.rfc2822()
-    'Fri, 16 Dec 2016 20:11:30 -0000'
+    # Also: MayaDT.from_rfc2822(...)
+    >>> tomorrow.rfc2822()
+    'Fri, 10 Feb 2017 22:17:01 GMT'
+
+    # Also: MayaDT.from_rfc3339(...)
+    >>> tomorrow.rfc3339()
+    '2017-02-10T22:17:01.44Z'
 
     >>> tomorrow.datetime()
     datetime.datetime(2016, 12, 16, 15, 11, 30, 263350, tzinfo=<UTC>)
@@ -44,14 +60,62 @@ Behold, datetimes for humans!
     >>> rand_day = maya.when('2011-02-07', timezone='US/Eastern')
     <MayaDT epoch=1297036800.0>
 
-    # Note how this is the 6th, not the 7th.
+    # Maya speaks Python.
+    >>> m = maya.MayaDT.from_datetime(datetime.utcnow())
+    >>> print(m)
+    Wed, 20 Sep 2017 17:24:32 GMT
+
+    >>> m = maya.MayaDT.from_struct(time.gmtime())
+    >>> print(m)
+    Wed, 20 Sep 2017 17:24:32 GMT
+
+    >>> m = maya.MayaDT(time.time())
+    >>> print(m)
+    Wed, 20 Sep 2017 17:24:32 GMT
+
     >>> rand_day.day
-    6
+    7
+
+    >>> rand_day.add(days=10).day
+    17
 
     # Always.
     >>> rand_day.timezone
     UTC
 
+    # Range of hours in a day:
+    >>> maya.intervals(start=maya.now(), end=maya.now().add(days=1), interval=60*60)
+    <generator object intervals at 0x105ba5820>
+
+    # snap modifiers
+    >>> dt = maya.when('Mon, 21 Feb 1994 21:21:42 GMT')
+    >>> dt.snap('@d+3h').rfc2822()
+    'Mon, 21 Feb 1994 03:00:00 GMT'
+
+	# snap modifiers within a timezone
+    >>> dt = maya.when('Mon, 21 Feb 1994 21:21:42 GMT')
+    >>> dt.snap_tz('+3h@d', 'Australia/Perth').rfc2822()
+	'Mon, 21 Feb 1994 16:00:00 GMT'
+
+☤ Advanced Usage of Maya
+------------------------
+
+In addition to timestamps, Maya also includes a wonderfully powerful ``MayaInterval`` class, which represents a range of time (e.g. an event). With this class, you can perform a multitude of advanced calendar calculations with finesse and ease.
+
+For example:
+
+.. code-block:: pycon
+
+    >>> from maya import MayaInterval
+
+    # Create an event that is one hour long, starting now.
+    >>> event_start = maya.now()
+    >>> event_end = event_start.add(hours=1)
+
+    >>> event = MayaInterval(start=event_start, end=event_end)
+
+From here, there are a number of methods available to you, which you can use to compare this event to another event.
+
 
 
 ☤ Why is this useful?
@@ -61,15 +125,41 @@ Behold, datetimes for humans!
 - Complete symmetric import and export of both ISO 8601 and RFC 2822 datetime stamps.
 - Fantastic parsing of both dates written for/by humans and machines (``maya.when()`` vs ``maya.parse()``).
 - Support for human slang, both import and export (e.g. `an hour ago`).
-- Datetimes can very easily be generated, with our without tzinfo attached.
+- Datetimes can very easily be generated, with or without tzinfo attached.
 - This library is based around epoch time, but dates before Jan 1 1970 are indeed supported, via negative integers.
-- Maya never panics, and always carrys a towel.
+- Maya never panics, and always carries a towel.
+
+
+☤ What about Delorean_, Arrow_, & Pendulum_?
+--------------------------------------------
+
+All these projects complement each other, and are friends. Pendulum, for example, helps power Maya's parsing.
+
+Arrow, for example, is a fantastic library, but isn't what I wanted in a datetime library. In many ways, it's better than Maya for certain things. In some ways, in my opinion, it's not.
+
+I simply desire a sane API for datetimes that made sense to me for all the things I'd ever want to do—especially when dealing with timezone algebra. Arrow doesn't do all of the things I need (but it does a lot more!). Maya does do exactly what I need.
+
+I think these projects complement each-other, personally. Maya is great for parsing websites, and dealing with calendar events!
+
+.. _Delorean: https://delorean.readthedocs.io/
+.. _Arrow: https://arrow.readthedocs.io/
+.. _Pendulum: https://pendulum.eustace.io/
+
 
 ☤ Installing Maya
 -----------------
 
-Installation is easy, with pip::
+Installation is easy, with:
 
     $ pip install maya
 
-✨🍰✨
+
+How to Contribute
+-----------------
+
+#. Check for open issues or open a fresh issue to start a discussion around a feature idea or a bug.
+#. Fork `the repository`_ on GitHub to start making your changes to the **master** branch (or branch off of it).
+#. Write a test which shows that the bug was fixed or that the feature works as expected.
+#. Send a pull request and bug the maintainer until it gets merged and published. :)
+
+.. _`the repository`: http://github.com/timofurrer/maya

demo.yml

@@ -0,0 +1,2 @@
+requirements:
+    - maya==0.6.0

docs/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = python -msphinx
+SPHINXPROJ    = maya
+SOURCEDIR     = source
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/make.bat

@@ -0,0 +1,36 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=python -msphinx
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+set SPHINXPROJ=maya
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The Sphinx module was not found. Make sure you have Sphinx installed,
+	echo.then set the SPHINXBUILD environment variable to point to the full
+	echo.path of the 'sphinx-build' executable. Alternatively you may add the
+	echo.Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.http://sphinx-doc.org/
+	exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
+
+:end
+popd

docs/source/conf.py

@@ -0,0 +1,162 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# maya documentation build configuration file, created by
+# sphinx-quickstart on Sun May 28 15:46:10 2017.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import sys
+
+# sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath(".."))
+sys.path.insert(0, os.path.abspath("_themes"))
+
+import maya  # noqa
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.todo",
+    "sphinx.ext.coverage",
+    "sphinx.ext.viewcode",
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = ".rst"
+
+# The master toctree document.
+master_doc = "index"
+
+# General information about the project.
+project = "maya"
+copyright = "2017, Kenneth Reitz"
+author = "Kenneth Reitz"
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = maya.__version__
+# The full version, including alpha/beta/rc tags.
+release = maya.__version__
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = "en"
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This patterns also effect to html_static_path and html_extra_path
+exclude_patterns = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = "sphinx"
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = "alabaster"
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+# html_theme_options = {}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+# html_static_path = ["_static"]
+
+
+# -- Options for HTMLHelp output ------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = "mayadoc"
+
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (master_doc, "maya.tex", "maya Documentation", "Kenneth Reitz", "manual")
+]
+
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [(master_doc, "maya", "maya Documentation", [author], 1)]
+
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (
+        master_doc,
+        "maya",
+        "maya Documentation",
+        author,
+        "maya",
+        "One line description of project.",
+        "Miscellaneous",
+    )
+]

docs/source/index.rst

@@ -0,0 +1,82 @@
+.. maya documentation master file, created by
+   sphinx-quickstart on Sun May 28 15:46:10 2017.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Maya: Datetime for Humans
+================================
+Release v\ |version|. (:ref:`Installation <install>`)
+
+.. image:: https://img.shields.io/pypi/v/maya.svg
+    :target: https://pypi.python.org/pypi/maya
+
+.. image:: https://travis-ci.org/kennethreitz/maya.svg?branch=master
+    :target: https://travis-ci.org/kennethreitz/maya
+
+.. image:: https://img.shields.io/badge/SayThanks-!-1EAEDB.svg
+    :target: https://saythanks.io/to/kennethreitz
+
+☤ Behold, datetimes for humans!
+-------------------------------
+.. code-block:: pycon
+
+    >>> now = maya.now()
+    <MayaDT epoch=1481850660.9>
+
+    >>> tomorrow = maya.when('tomorrow')
+    <MayaDT epoch=1481919067.23>
+
+    >>> tomorrow.slang_date()
+    'tomorrow'
+
+    >>> tomorrow.slang_time()
+    '23 hours from now'
+
+    # Also: MayaDT.from_iso8601(...)
+    >>> tomorrow.iso8601()
+    '2017-02-10T22:17:01.445418Z'
+
+    # Also: MayaDT.from_rfc2822(...)
+    >>> tomorrow.rfc2822()
+    'Fri, 10 Feb 2017 22:17:01 GMT'
+
+    # Also: MayaDT.from_rfc3339(...)
+    >>> tomorrow.rfc3339()
+    '2017-02-10T22:17:01.44Z'
+
+    >>> tomorrow.datetime()
+    datetime.datetime(2016, 12, 16, 15, 11, 30, 263350, tzinfo=<UTC>)
+
+    # Automatically parse datetime strings and generate naive datetimes.
+    >>> scraped = '2016-12-16 18:23:45.423992+00:00'
+    >>> maya.parse(scraped).datetime(to_timezone='US/Eastern', naive=True)
+    datetime.datetime(2016, 12, 16, 13, 23, 45, 423992)
+
+    >>> rand_day = maya.when('2011-02-07', timezone='US/Eastern')
+    <MayaDT epoch=1297036800.0>
+
+    >>> rand_day.day
+    7
+
+    >>> rand_day.add(days=10).day
+    17
+
+    # Always.
+    >>> rand_day.timezone
+    UTC
+
+    # Range of hours in a day:
+    >>> maya.interval(
+    ... start=maya.now(),
+    ... end=maya.now().add(days=1),
+    ... interval=60*60)
+    <generator object intervals at 0x105ba5820>
+
+
+Table of Contents
+-----------------
+.. toctree::
+   :maxdepth: 2
+
+   user/install
+   user/quickstart

docs/source/user/install.rst

@@ -0,0 +1,29 @@
+.. _install:
+
+Installation
+============
+
+Pip Install Maya
+----------------
+
+To install maya, simply use::
+   $ pip install maya
+
+Source Code
+-----------
+Maya is actively developed on `Github
+<https://github.com/kennethreitz/maya.git>`_
+
+You can either clone the public repository::
+
+    $ git clone git://github.com/kennethreitz/maya.git
+
+Or, download the `tarball <https://github.com/kennethreitz/maya/tarball/master>`_::
+
+    $ curl -OL https://github.com/kennethreitz/maya/tarball/master
+      # optionally, zipball is also available (for Windows users).
+
+Once you have a copy of the source, you can embed it in your own Python
+package, or install it into your site-packages easily::
+
+    $ python setup.py install

docs/source/user/quickstart.rst

@@ -0,0 +1,30 @@
+.. _quickstart:
+
+Quickstart
+==========
+
+.. module::maya
+
+Ready for a simple datetime tool? This doc provides some tools to use in your
+busy workflow.
+
+Parse a Date
+------------
+Parsing a date from a string with Maya is 🍰!
+
+First, you'll need to import maya::
+
+   >>> import maya
+
+There are currently two ways to make sense of datetime:
+
+- ``maya.parse``
+- ``maya.when``
+
+A simple answer is that you should use parse on machine output, and when on human input.
+
+Use as follows::
+
+   >>> recent_win = maya.parse('2016-11-02T20:00PM')
+   >>> old_win = maya.when('October 14, 1908')
+   >>> grandpas_date = maya.when('108 years ago')

maya.py

@@ -1,208 +0,0 @@
-
-# ___  __  ___  _  _  ___
-# || \/ | ||=|| \\// ||=||
-# ||    | || ||  //  || ||
-
-# Ignore warnings for yaml usage.
-import warnings
-import ruamel.yaml
-warnings.simplefilter('ignore', ruamel.yaml.error.UnsafeLoaderWarning)
-
-
-import email.utils
-import time
-from datetime import datetime as Datetime
-
-import pytz
-import humanize
-import dateparser
-import iso8601
-import dateutil.parser
-from tzlocal import get_localzone
-
-EPOCH_START = (1970, 1, 1)
-
-class MayaDT(object):
-    """The Maya Datetime object."""
-
-    def __init__(self, epoch):
-        super(MayaDT, self).__init__()
-        self._epoch = epoch
-
-    def __repr__(self):
-        return '<MayaDT epoch={}>'.format(self._epoch)
-
-    def __format__(self, *args, **kwargs):
-        """Return's the datetime's format"""
-        return self.datetime(*args, **kwargs)
-
-    # Timezone Crap
-    # -------------
-
-    @property
-    def timezone(self):
-        """Returns the UTC tzinfo name. It's always UTC. Always."""
-        return 'UTC'
-
-    @property
-    def _tz(self):
-        """Returns the UTC tzinfo object."""
-        return pytz.timezone(self.timezone)
-
-    @property
-    def local_timezone(self):
-        """Returns the name of the local timezone, for informational purposes."""
-        return self._local_tz.zone
-
-    @property
-    def _local_tz(self):
-        """Returns the local timezone."""
-        return get_localzone()
-
-    @staticmethod
-    def __dt_to_epoch(dt):
-        """Converts a datetime into an epoch."""
-
-        # Assume UTC if no datetime is provided.
-        if dt.tzinfo is None:
-            dt = dt.replace(tzinfo=pytz.utc)
-
-        epoch_start = Datetime(*EPOCH_START, tzinfo=pytz.timezone('UTC'))
-        return (dt - epoch_start).total_seconds()
-
-    # Importers
-    # ---------
-
-    @classmethod
-    def from_datetime(klass, dt):
-        """Returns MayaDT instance from datetime."""
-        return klass(klass.__dt_to_epoch(dt))
-
-    @classmethod
-    def from_iso8601(klass, string):
-        """Returns MayaDT instance from iso8601 string."""
-        dt = iso8601.parse_date(string)
-        return klass.from_datetime(dt)
-
-    @staticmethod
-    def from_rfc2822(string):
-        """Returns MayaDT instance from rfc2822 string."""
-        return parse(string)
-
-    # Exporters
-    # ---------
-
-    def datetime(self, to_timezone=None, naive=False):
-        """Returns a timezone-aware datetime...
-        Defaulting to UTC (as it should).
-
-        Keyword Arguments:
-            to_timezone {string} -- timezone to convert to (default: None/UTC)
-            naive {boolean} -- if True, the tzinfo is simply dropped (default: False)
-        """
-        if to_timezone:
-            dt = self.datetime().astimezone(pytz.timezone(to_timezone))
-        else:
-            dt = Datetime.utcfromtimestamp(self._epoch)
-
-        # Strip the timezone info if requested to do so.
-        if naive:
-            return dt.replace(tzinfo=None)
-
-        return dt.replace(tzinfo=self._tz)
-
-    def iso8601(self):
-        """Returns an ISO 8601 representation of the MayaDT."""
-        # Get a timezone-naive datetime.
-        dt = self.datetime(naive=True)
-        return '{}Z'.format(dt.isoformat())
-
-    def rfc2822(self):
-        """Returns an RFC 2822 representation of the MayaDT."""
-        return email.utils.formatdate(self.epoch, usegmt=True)
-
-    # Properties
-    # ----------
-
-    @property
-    def year(self):
-        return self.datetime().year
-
-    @property
-    def month(self):
-        return self.datetime().month
-
-    @property
-    def day(self):
-        return self.datetime().day
-
-    @property
-    def hour(self):
-        return self.datetime().hour
-
-    @property
-    def minute(self):
-        return self.datetime().minute
-
-    @property
-    def second(self):
-        return self.datetime().second
-
-    @property
-    def microsecond(self):
-        return self.datetime().microsecond
-
-    @property
-    def epoch(self):
-        return self._epoch
-
-    # Human Slang Extras
-    # ------------------
-
-    def slang_date(self):
-        """"Returns human slang representation of date."""
-        return humanize.naturaldate(self.datetime())
-
-    def slang_time(self):
-        """"Returns human slang representation of time."""
-        dt = self.datetime(naive=True, to_timezone=self.local_timezone)
-        return humanize.naturaltime(dt)
-
-
-
-
-def now():
-    """Returns a MayaDT instance for this exact moment."""
-    epoch = time.time()
-    return MayaDT(epoch=epoch)
-
-def when(string, timezone='UTC'):
-    """"Returns a MayaDT instance for the human moment specified.
-
-    Powered by dateparser. Useful for scraping websites.
-
-    Examples:
-        'next week', 'now', 'tomorrow', '300 years ago', 'August 14, 2015'
-
-    Keyword Arguments:
-        string -- string to be parsed
-        timezone -- timezone referenced from (default: 'UTC')
-
-    """
-    dt = dateparser.parse(string, settings={'TIMEZONE': timezone, 'RETURN_AS_TIMEZONE_AWARE': True, 'TO_TIMEZONE': 'UTC'})
-
-    if dt is None:
-        raise ValueError('invalid datetime input specified.')
-
-    return MayaDT.from_datetime(dt)
-
-def parse(string):
-    """"Returns a MayaDT instance for the machine-produced moment specified.
-
-    Powered by dateutil. Accepts most known formats. Useful for working with data.
-
-    Keyword Arguments:
-        string -- string to be parsed
-    """
-    dt = dateutil.parser.parse(string)
-    return MayaDT.from_datetime(dt)

requirements.txt

@@ -1,15 +0,0 @@
-dateparser==0.5.0
-humanize==0.5.1
-iso8601==0.1.11
-jdatetime==1.8.1
-py==1.4.32
-pytest==3.0.5
-python-dateutil==2.6.0
-pytz==2016.10
-regex==2016.11.21
-ruamel.ordereddict==0.4.9
-ruamel.yaml==0.13.4
-six==1.10.0
-typing==3.5.2.2
-tzlocal==1.3
-umalqurra==0.2

setup.cfg

@@ -0,0 +1,18 @@
+[bdist_wheel]
+universal = 1
+
+[metadata]
+# ensure LICENSE is included in wheel metadata
+license_file = LICENSE
+
+[flake8]
+max-line-length = 100
+ignore = E203
+
+[tool:pytest]
+testpaths = tests/
+
+[isort]
+known_first_party=maya
+known_third_party=humanize,pytz,dateparser,tzlocal,pendulum,snaptime
+multi_line_output=3

setup.py

@@ -1,36 +1,92 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
+import codecs
 import os
-import sys
+import re
 
-from setuptools import setup
+from setuptools import find_packages, setup
 
-
-if sys.argv[-1] == "publish":
-    os.system("python setup.py sdist bdist_wheel upload")
-    sys.exit()
-
-required = [
-    'humanize',
-    'pytz',
-    'dateparser',
-    'iso8601',
-    'python-dateutil'
+#: Holds a list of packages to install with the binary distribution
+PACKAGES = find_packages(where="src")
+META_FILE = os.path.abspath("src/maya/__init__.py")
+KEYWORDS = ["datetime", "timezone", "scrape", "web"]
+CLASSIFIERS = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Natural Language :: English",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 2",
+    "Programming Language :: Python :: 2.7",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: Implementation",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 
-setup(
-    name='maya',
-    version='0.1.0',
-    description='Datetimes for Humans.',
-    long_description=open('README.rst').read(),
-    author='Kenneth Reitz',
-    author_email='me@kennethreitz.com',
-    url='https://github.com/kennethreitz/maya',
-    my_modules=['maya'],
-    install_requires=required,
-    license='MIT',
-    classifiers=(
-
-    ),
+#: Holds the runtime requirements for the end user
+INSTALL_REQUIRES = [
+    "humanize",
+    "pytz",
+    "dateparser>=0.7.0",
+    "tzlocal",
+    "pendulum>=2.0.2",
+    "snaptime",
+]
+#: Holds runtime requirements and development requirements
+EXTRAS_REQUIRES = {
+    # extras for contributors
+    "docs": ["sphinx"],
+    "tests": ["freezegun", "coverage", "pytest", "pytest-mock"],
+}
+EXTRAS_REQUIRES["dev"] = (
+    EXTRAS_REQUIRES["tests"] + EXTRAS_REQUIRES["docs"] + ["pre-commit"]
+)
+
+#: Holds the contents of the README file
+with codecs.open("README.rst", encoding="utf-8") as readme:
+    __README_CONTENTS__ = readme.read()
+
+
+def read(metafile):
+    """
+    Return the contents of the given meta data file assuming UTF-8 encoding.
+    """
+    with codecs.open(str(metafile), encoding="utf-8") as f:
+        return f.read()
+
+
+def get_meta(meta, metafile):
+    """
+    Extract __*meta*__ from the given metafile.
+    """
+    contents = read(metafile)
+    meta_match = re.search(
+        r"^__{meta}__ = ['\"]([^'\"]*)['\"]".format(meta=meta), contents, re.M
+    )
+    if meta_match:
+        return meta_match.group(1)
+    raise RuntimeError("Unable to find __{meta}__ string.".format(meta=meta))
+
+
+setup(
+    name="maya",
+    version=get_meta("version", META_FILE),
+    license=get_meta("license", META_FILE),
+    description=get_meta("description", META_FILE),
+    long_description=__README_CONTENTS__,
+    author=get_meta("author", META_FILE),
+    author_email=get_meta("author_email", META_FILE),
+    maintainer=get_meta("author", META_FILE),
+    maintainer_email=get_meta("author_email", META_FILE),
+    platforms=["Linux", "Windows", "MAC OS X"],
+    url=get_meta("url", META_FILE),
+    download_url=get_meta("download_url", META_FILE),
+    bugtrack_url=get_meta("bugtrack_url", META_FILE),
+    packages=PACKAGES,
+    package_dir={"": "src"},
+    include_package_data=True,
+    install_requires=INSTALL_REQUIRES,
+    extras_require=EXTRAS_REQUIRES,
+    keywords=KEYWORDS,
+    classifiers=CLASSIFIERS,
 )

src/maya/__init__.py

@@ -0,0 +1,10 @@
+__description__ = "Datetimes for Humans™"
+__license__ = "MIT"
+__version__ = "0.6.0a1"
+__author__ = "Timo Furrer"
+__author_email__ = "tuxtimo@gmail.com"
+__url__ = "http://github.com/timofurrer/maya"
+__download_url__ = "https://github.com/timofurrer/maya"
+__bugtrack_url__ = "https://github.com/timofurrer/maya/issues"
+
+from .core import *  # noqa

src/maya/compat.py

@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+"""
+maya.compat
+~~~~~~~~~~~~~~~
+This module handles import compatibility issues between Python 2 and
+Python 3.
+"""
+
+import sys
+
+# -------
+# Pythons
+# -------
+# Syntax sugar.
+_ver = sys.version_info
+# : Python 2.x?
+is_py2 = _ver[0] == 2
+# : Python 3.x?
+is_py3 = _ver[0] == 3
+# ---------
+# Specifics
+# ---------
+if is_py2:
+    cmp = cmp  # noqa
+
+elif is_py3:
+
+    def cmp(a, b):
+        """
+        Compare two objects.
+        Returns a negative number if C{a < b}, zero if they are equal, and a
+        positive number if C{a > b}.
+        """
+        if a < b:
+            return -1
+
+        elif a == b:
+            return 0
+
+        else:
+            return 1
+
+
+def comparable(klass):
+    """
+    Class decorator that ensures support for the special C{__cmp__} method.
+    On Python 2 this does nothing.
+    On Python 3, C{__eq__}, C{__lt__}, etc. methods are added to the class,
+    relying on C{__cmp__} to implement their comparisons.
+    """
+    # On Python 2, __cmp__ will just work, so no need to add extra methods:
+    if not is_py3:
+        return klass
+
+    def __eq__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c == 0
+
+    def __ne__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c != 0
+
+    def __lt__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c < 0
+
+    def __le__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c <= 0
+
+    def __gt__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c > 0
+
+    def __ge__(self, other):
+        c = self.__cmp__(other)
+        if c is NotImplemented:
+            return c
+
+        return c >= 0
+
+    klass.__lt__ = __lt__
+    klass.__gt__ = __gt__
+    klass.__le__ = __le__
+    klass.__ge__ = __ge__
+    klass.__eq__ = __eq__
+    klass.__ne__ = __ne__
+    return klass

src/maya/core.py

@@ -0,0 +1,815 @@
+# ___  __  ___  _  _  ___
+# || \/ | ||=|| \\// ||=||
+# ||    | || ||  //  || ||
+import email.utils
+import time
+import functools
+from datetime import timedelta, datetime as Datetime
+
+import re
+import pytz
+import humanize
+import dateparser
+import pendulum
+import snaptime
+from tzlocal import get_localzone
+from dateutil.relativedelta import relativedelta
+from dateparser.languages.loader import default_loader
+
+from .compat import cmp, comparable
+
+
+def validate_class_type_arguments(operator):
+    """
+    Decorator to validate all the arguments to function
+    are of the type of calling class for passed operator
+    """
+
+    def inner(function):
+        def wrapper(self, *args, **kwargs):
+            for arg in args + tuple(kwargs.values()):
+                if not isinstance(arg, self.__class__):
+                    raise TypeError(
+                        "unorderable types: {}() {} {}()".format(
+                            type(self).__name__, operator, type(arg).__name__
+                        )
+                    )
+
+            return function(self, *args, **kwargs)
+
+        return wrapper
+
+    return inner
+
+
+def validate_arguments_type_of_function(param_type=None):
+    """
+    Decorator to validate the <type> of arguments in
+    the calling function are of the `param_type` class.
+
+    if `param_type` is None, uses `param_type` as the class where it is used.
+
+    Note: Use this decorator on the functions of the class.
+    """
+
+    def inner(function):
+        def wrapper(self, *args, **kwargs):
+            type_ = param_type or type(self)
+            for arg in args + tuple(kwargs.values()):
+                if not isinstance(arg, type_):
+                    raise TypeError(
+                        (
+                            "Invalid Type: {}.{}() accepts only the "
+                            'arguments of type "<{}>"'
+                        ).format(type(self).__name__, function.__name__, type_.__name__)
+                    )
+
+            return function(self, *args, **kwargs)
+
+        return wrapper
+
+    return inner
+
+
+class MayaDT(object):
+    """The Maya Datetime object."""
+
+    __EPOCH_START = (1970, 1, 1)
+
+    def __init__(self, epoch):
+        super(MayaDT, self).__init__()
+        self._epoch = epoch
+
+    def __repr__(self):
+        return "<MayaDT epoch={}>".format(self._epoch)
+
+    def __str__(self):
+        return self.rfc2822()
+
+    def __format__(self, *args, **kwargs):
+        """Return's the datetime's format"""
+        return format(self.datetime(), *args, **kwargs)
+
+    @validate_class_type_arguments("==")
+    def __eq__(self, maya_dt):
+        return int(self._epoch) == int(maya_dt._epoch)
+
+    @validate_class_type_arguments("!=")
+    def __ne__(self, maya_dt):
+        return int(self._epoch) != int(maya_dt._epoch)
+
+    @validate_class_type_arguments("<")
+    def __lt__(self, maya_dt):
+        return int(self._epoch) < int(maya_dt._epoch)
+
+    @validate_class_type_arguments("<=")
+    def __le__(self, maya_dt):
+        return int(self._epoch) <= int(maya_dt._epoch)
+
+    @validate_class_type_arguments(">")
+    def __gt__(self, maya_dt):
+        return int(self._epoch) > int(maya_dt._epoch)
+
+    @validate_class_type_arguments(">=")
+    def __ge__(self, maya_dt):
+        return int(self._epoch) >= int(maya_dt._epoch)
+
+    def __hash__(self):
+        return hash(int(self.epoch))
+
+    def __add__(self, duration):
+        return self.add(seconds=_seconds_or_timedelta(duration).total_seconds())
+
+    def __radd__(self, duration):
+        return self + duration
+
+    def __sub__(self, duration_or_date):
+        if isinstance(duration_or_date, MayaDT):
+            return self.subtract_date(dt=duration_or_date)
+
+        else:
+            return self.subtract(
+                seconds=_seconds_or_timedelta(duration_or_date).total_seconds()
+            )
+
+    def add(self, **kwargs):
+        """Returns a new MayaDT object with the given offsets."""
+        return self.from_datetime(pendulum.instance(self.datetime()).add(**kwargs))
+
+    def subtract(self, **kwargs):
+        """Returns a new MayaDT object with the given offsets."""
+        return self.from_datetime(pendulum.instance(self.datetime()).subtract(**kwargs))
+
+    def subtract_date(self, **kwargs):
+        """Returns a timedelta object with the duration between the dates"""
+        return timedelta(seconds=self.epoch - kwargs["dt"].epoch)
+
+    def snap(self, instruction):
+        """
+        Returns a new MayaDT object modified by the given instruction.
+
+        Powered by snaptime.  See https://github.com/zartstrom/snaptime
+        for a complete documentation about the snaptime instructions.
+        """
+        return self.from_datetime(snaptime.snap(self.datetime(), instruction))
+
+    def snap_tz(self, instruction, in_timezone):
+        """
+        Returns a new MayaDT object modified by the given instruction.
+        The modifications happen in the given timezone.
+
+        Powered by snaptime.  See https://github.com/zartstrom/snaptime
+        for a complete documentation about the snaptime instructions.
+        """
+        dt_tz = self.datetime(to_timezone=in_timezone)
+        return self.from_datetime(snaptime.snap_tz(dt_tz, instruction, dt_tz.tzinfo))
+
+    # Timezone Crap
+    # -------------
+    @property
+    def timezone(self):
+        """Returns the UTC tzinfo name. It's always UTC. Always."""
+        return "UTC"
+
+    @property
+    def _tz(self):
+        """Returns the UTC tzinfo object."""
+        return pytz.timezone(self.timezone)
+
+    @property
+    def local_timezone(self):
+        """Returns the name of the local timezone."""
+        if self._local_tz.zone in pytz.all_timezones:
+            return self._local_tz.zone
+
+        return self.timezone
+
+    @property
+    def _local_tz(self):
+        """Returns the local timezone."""
+        return get_localzone()
+
+    @staticmethod
+    @validate_arguments_type_of_function(Datetime)
+    def __dt_to_epoch(dt):
+        """Converts a datetime into an epoch."""
+        # Assume UTC if no datetime is provided.
+        if dt.tzinfo is None:
+            dt = dt.replace(tzinfo=pytz.utc)
+        epoch_start = Datetime(*MayaDT.__EPOCH_START, tzinfo=pytz.timezone("UTC"))
+        return (dt - epoch_start).total_seconds()
+
+    # Importers
+    # ---------
+    @classmethod
+    @validate_arguments_type_of_function(Datetime)
+    def from_datetime(klass, dt):
+        """Returns MayaDT instance from datetime."""
+        return klass(klass.__dt_to_epoch(dt))
+
+    @classmethod
+    @validate_arguments_type_of_function(time.struct_time)
+    def from_struct(klass, struct, timezone=pytz.UTC):
+        """Returns MayaDT instance from a 9-tuple struct
+
+        It's assumed to be from gmtime().
+        """
+        struct_time = time.mktime(struct) - utc_offset(struct)
+        dt = Datetime.fromtimestamp(struct_time, timezone)
+        return klass(klass.__dt_to_epoch(dt))
+
+    @classmethod
+    def from_iso8601(klass, iso8601_string):
+        """Returns MayaDT instance from iso8601 string."""
+        return parse(iso8601_string)
+
+    @classmethod
+    def from_long_count(klass, long_count_string):
+        """Returns MayaDT instance from Maya Long Count string."""
+        days_since_creation = -1856305
+        factors = (144000, 7200, 360, 20, 1)
+        for i, value in enumerate(long_count_string.split('.')):
+            days_since_creation += int(value) * factors[i]
+        days_since_creation *= 3600 * 24
+        return klass(epoch=days_since_creation)
+
+    @staticmethod
+    def from_rfc2822(rfc2822_string):
+        """Returns MayaDT instance from rfc2822 string."""
+        return parse(rfc2822_string)
+
+    @staticmethod
+    def from_rfc3339(rfc3339_string):
+        """Returns MayaDT instance from rfc3339 string."""
+        return parse(rfc3339_string)
+
+    # Exporters
+    # ---------
+    def datetime(self, to_timezone=None, naive=False):
+        """Returns a timezone-aware datetime...
+        Defaulting to UTC (as it should).
+
+        Keyword Arguments:
+            to_timezone {str} -- timezone to convert to (default: None/UTC)
+            naive {bool} -- if True,
+                            the tzinfo is simply dropped (default: False)
+        """
+        if to_timezone:
+            dt = self.datetime().astimezone(pytz.timezone(to_timezone))
+        else:
+            try:
+                dt = Datetime.utcfromtimestamp(self._epoch)
+            except: # Fallback for before year 1970 issue
+                dt = Datetime.utcfromtimestamp(0) + timedelta(microseconds=self._epoch*1000000)
+            dt.replace(tzinfo=self._tz)
+        # Strip the timezone info if requested to do so.
+        if naive:
+            return dt.replace(tzinfo=None)
+
+        else:
+            if dt.tzinfo is None:
+                dt = dt.replace(tzinfo=self._tz)
+        return dt
+
+    def local_datetime(self):
+        """Returns a local timezone-aware datetime object
+
+        It's the same as:
+        mayaDt.datetime(to_timezone=mayaDt.local_timezone)
+        """
+        return self.datetime(to_timezone=self.local_timezone, naive=False)
+
+    def iso8601(self):
+        """Returns an ISO 8601 representation of the MayaDT."""
+        # Get a timezone-naive datetime.
+        dt = self.datetime(naive=True)
+        return "{}Z".format(dt.isoformat())
+
+    def rfc2822(self):
+        """Returns an RFC 2822 representation of the MayaDT."""
+        return email.utils.formatdate(self.epoch, usegmt=True)
+
+    def rfc3339(self):
+        """Returns an RFC 3339 representation of the MayaDT."""
+        return self.datetime().strftime("%Y-%m-%dT%H:%M:%S.%f")[:-5] + "Z"
+
+    def long_count(self):
+        """Returns a Mayan Long Count representation of the Maya DT."""
+        # Creation (0.0.0.0.0) occurred on -3114-08-11
+        # 1856305 is distance (in days) between Creation and UNIX epoch
+        days_since_creation = int(1856305 + self._epoch / (3600 * 24))
+        caps = (0, 20, 20, 18, 20)
+        lc_date = [0, 0, 0, 0, days_since_creation]
+        for i in range(4, 0, -1):
+            if lc_date[i] >= caps[i]:
+                lc_date[i - 1] += int(lc_date[i] / caps[i])
+                lc_date[i] %= caps[i]
+            elif lc_date[i] < 0:
+                lc_date[i - 1] += int(lc_date[i] / caps[i])
+                lc_date[i] = 0
+        return '.'.join(str(i) for i in lc_date)
+
+    # Properties
+    # ----------
+    @property
+    def year(self):
+        return self.datetime().year
+
+    @property
+    def month(self):
+        return self.datetime().month
+
+    @property
+    def day(self):
+        return self.datetime().day
+
+    @property
+    def date(self):
+        return self.datetime().date()
+
+    @property
+    def week(self):
+        return self.datetime().isocalendar()[1]
+
+    @property
+    def weekday(self):
+        """Return the day of the week as an integer.
+
+        Monday is 1 and Sunday is 7.
+        """
+        return self.datetime().isoweekday()
+
+    @property
+    def hour(self):
+        return self.datetime().hour
+
+    @property
+    def minute(self):
+        return self.datetime().minute
+
+    @property
+    def second(self):
+        return self.datetime().second
+
+    @property
+    def microsecond(self):
+        return self.datetime().microsecond
+
+    @property
+    def epoch(self):
+        return int(self._epoch)
+
+    # Human Slang Extras
+    # ------------------
+    def slang_date(self, locale="en"):
+        """"Returns human slang representation of date.
+
+        Keyword Arguments:
+            locale -- locale to translate to, e.g. 'fr' for french.
+                       (default: 'en' - English)
+        """
+        dt = pendulum.instance(self.datetime())
+
+        try:
+            return _translate(dt, locale)
+        except KeyError:
+            pass
+
+        delta = humanize.time._abs_timedelta(
+            timedelta(seconds=(self.epoch - now().epoch))
+        )
+
+        format_string = "DD MMM"
+        if delta.days >= 365:
+            format_string += " YYYY"
+
+        return dt.format(format_string, locale=locale).title()
+
+    def slang_time(self, locale="en"):
+        """"Returns human slang representation of time.
+
+        Keyword Arguments:
+            locale -- locale to translate to, e.g. 'fr' for french.
+                       (default: 'en' - English)
+        """
+        dt = self.datetime()
+        return pendulum.instance(dt).diff_for_humans(locale=locale)
+
+
+def utc_offset(time_struct=None):
+    """
+    Returns the time offset from UTC accounting for DST
+
+    Keyword Arguments:
+        time_struct {time.struct_time} -- the struct time for which to
+                                          return the UTC offset.
+                                          If None, use current local time.
+    """
+    if time_struct:
+        ts = time_struct
+    else:
+        ts = time.localtime()
+
+    if ts[-1]:
+        offset = time.altzone
+    else:
+        offset = time.timezone
+    return offset
+
+
+def to_utc_offset_naive(dt):
+    if dt.tzinfo is None:
+        return dt
+
+    return dt.astimezone(pytz.utc).replace(tzinfo=None)
+
+
+def to_utc_offset_aware(dt):
+    if dt.tzinfo is not None:
+        return dt
+
+    return pytz.utc.localize(dt)
+
+
+def to_iso8601(dt):
+    return to_utc_offset_naive(dt).isoformat() + "Z"
+
+
+def end_of_day_midnight(dt):
+    if dt.time() == time.min:
+        return dt
+
+    else:
+        return dt.replace(hour=0, minute=0, second=0, microsecond=0) + timedelta(days=1)
+
+
+@comparable
+class MayaInterval(object):
+    """
+    A MayaInterval represents a range between two datetimes,
+    inclusive of the start and exclusive of the end.
+    """
+
+    def __init__(self, start=None, end=None, duration=None):
+        try:
+            # Ensure that proper arguments were passed.
+            assert any(
+                (
+                    (start and end),
+                    (start and duration is not None),
+                    (end and duration is not None),
+                )
+            )
+            assert not all((start, end, duration is not None))
+        except AssertionError:
+            raise ValueError("Exactly 2 of start, end, and duration must be specified")
+
+        # Convert duration to timedelta if seconds were provided.
+        if duration:
+            duration = _seconds_or_timedelta(duration)
+        if not start:
+            start = end - duration
+        if not end:
+            end = start + duration
+        if start > end:
+            raise ValueError("MayaInterval cannot end before it starts")
+
+        self.start = start
+        self.end = end
+
+    def __repr__(self):
+        return "<MayaInterval start={0!r} end={1!r}>".format(self.start, self.end)
+
+    def iso8601(self):
+        """Returns an ISO 8601 representation of the MayaInterval."""
+        return "{0}/{1}".format(self.start.iso8601(), self.end.iso8601())
+
+    @classmethod
+    def parse_iso8601_duration(cls, duration, start=None, end=None):
+        match = re.match(
+            r"(?:P(?P<weeks>\d+)W)|(?:P(?:(?:(?P<years>\d+)Y)?(?:(?P<months>\d+)M)?(?:(?P<days>\d+)D))?(?:T(?:(?P<hours>\d+)H)?(?:(?P<minutes>\d+)M)?(?:(?P<seconds>\d+)S)?)?)",  # noqa
+            duration,
+        )
+
+        time_components = {}
+        if match:
+            time_components = match.groupdict(0)
+            for key, value in time_components.items():
+                time_components[key] = int(value)
+
+            duration = relativedelta(**time_components)
+
+            if start:
+                return parse(start.datetime() + duration)
+
+            if end:
+                return parse(end.datetime() - duration)
+
+        return None
+
+    @classmethod
+    def from_iso8601(cls, s):
+        # # Start and end, such as "2007-03-01T13:00:00Z/2008-05-11T15:30:00Z"
+        start, end = s.split("/")
+        try:
+            start = parse(start)
+        except pendulum.parsing.exceptions.ParserError:
+            # start = self._parse_iso8601_duration(start, end=end)
+            raise NotImplementedError()
+
+        try:
+            end = parse(end)
+        except (pendulum.parsing.exceptions.ParserError, TypeError):
+            end = cls.parse_iso8601_duration(end, start=start)
+
+        return cls(start=start, end=end)
+
+        # # Start and duration, such as "2007-03-01T13:00:00Z/P1Y2M10DT2H30M"
+        # # Duration and end, such as "P1Y2M10DT2H30M/2008-05-11T15:30:00Z"
+
+    @validate_arguments_type_of_function()
+    def __and__(self, maya_interval):
+        return self.intersection(maya_interval)
+
+    @validate_arguments_type_of_function()
+    def __or__(self, maya_interval):
+        return self.combine(maya_interval)
+
+    @validate_arguments_type_of_function()
+    def __eq__(self, maya_interval):
+        return self.start == maya_interval.start and self.end == maya_interval.end
+
+    def __hash__(self):
+        return hash((self.start, self.end))
+
+    def __iter__(self):
+        yield self.start
+        yield self.end
+
+    @validate_arguments_type_of_function()
+    def __cmp__(self, maya_interval):
+        return cmp(self.start, maya_interval.start) or cmp(self.end, maya_interval.end)
+
+    @property
+    def duration(self):
+        return self.timedelta.total_seconds()
+
+    @property
+    def timedelta(self):
+        return timedelta(seconds=(self.end.epoch - self.start.epoch))
+
+    @property
+    def is_instant(self):
+        return self.timedelta == timedelta(seconds=0)
+
+    def intersects(self, maya_interval):
+        return self & maya_interval is not None
+
+    @property
+    def midpoint(self):
+        return self.start.add(seconds=(self.duration / 2))
+
+    @validate_arguments_type_of_function()
+    def combine(self, maya_interval):
+        """Returns a combined list of timespans, merged together."""
+        interval_list = sorted([self, maya_interval])
+        if self & maya_interval or self.is_adjacent(maya_interval):
+            return [
+                MayaInterval(
+                    interval_list[0].start,
+                    max(interval_list[0].end, interval_list[1].end),
+                )
+            ]
+
+        return interval_list
+
+    @validate_arguments_type_of_function()
+    def subtract(self, maya_interval):
+        """"Removes the given interval."""
+        if not self & maya_interval:
+            return [self]
+
+        elif maya_interval.contains(self):
+            return []
+
+        interval_list = []
+        if self.start < maya_interval.start:
+            interval_list.append(MayaInterval(self.start, maya_interval.start))
+        if self.end > maya_interval.end:
+            interval_list.append(MayaInterval(maya_interval.end, self.end))
+        return interval_list
+
+    def split(self, duration, include_remainder=True):
+        # Convert seconds to timedelta, if appropriate.
+        duration = _seconds_or_timedelta(duration)
+        if duration <= timedelta(seconds=0):
+            raise ValueError("cannot call split with a non-positive timedelta")
+
+        start = self.start
+        while start < self.end:
+            if start + duration <= self.end:
+                yield MayaInterval(start, start + duration)
+
+            elif include_remainder:
+                yield MayaInterval(start, self.end)
+
+            start += duration
+
+    def quantize(self, duration, snap_out=False, timezone="UTC"):
+        """Returns a quantized interval."""
+        # Convert seconds to timedelta, if appropriate.
+        duration = _seconds_or_timedelta(duration)
+        timezone = pytz.timezone(timezone)
+        if duration <= timedelta(seconds=0):
+            raise ValueError("cannot quantize by non-positive timedelta")
+
+        epoch = timezone.localize(Datetime(1970, 1, 1))
+        seconds = int(duration.total_seconds())
+        start_seconds = int((self.start.datetime(naive=False) - epoch).total_seconds())
+        end_seconds = int((self.end.datetime(naive=False) - epoch).total_seconds())
+        if start_seconds % seconds and not snap_out:
+            start_seconds += seconds
+        if end_seconds % seconds and snap_out:
+            end_seconds += seconds
+        start_seconds -= start_seconds % seconds
+        end_seconds -= end_seconds % seconds
+        if start_seconds > end_seconds:
+            start_seconds = end_seconds
+        return MayaInterval(
+            start=MayaDT.from_datetime(epoch).add(seconds=start_seconds),
+            end=MayaDT.from_datetime(epoch).add(seconds=end_seconds),
+        )
+
+    @validate_arguments_type_of_function()
+    def intersection(self, maya_interval):
+        """Returns the intersection between two intervals."""
+        start = max(self.start, maya_interval.start)
+        end = min(self.end, maya_interval.end)
+        either_instant = self.is_instant or maya_interval.is_instant
+        instant_overlap = self.start == maya_interval.start or start <= end
+        if (either_instant and instant_overlap) or (start < end):
+            return MayaInterval(start, end)
+
+    @validate_arguments_type_of_function()
+    def contains(self, maya_interval):
+        return self.start <= maya_interval.start and self.end >= maya_interval.end
+
+    def __contains__(self, maya_dt):
+        if isinstance(maya_dt, MayaDT):
+            return self.contains_dt(maya_dt)
+
+        return self.contains(maya_dt)
+
+    def contains_dt(self, dt):
+        return self.start <= dt < self.end
+
+    @validate_arguments_type_of_function()
+    def is_adjacent(self, maya_interval):
+        return self.start == maya_interval.end or self.end == maya_interval.start
+
+    @property
+    def icalendar(self):
+        ical_dt_format = "%Y%m%dT%H%M%SZ"
+        return (
+            """
+        BEGIN:VCALENDAR
+        VERSION:2.0
+        BEGIN:VEVENT
+        DTSTART:{0}
+        DTEND:{1}
+        END:VEVENT
+        END:VCALENDAR
+        """.format(
+                self.start.datetime().strftime(ical_dt_format),
+                self.end.datetime().strftime(ical_dt_format),
+            )
+            .replace(" ", "")
+            .strip("\r\n")
+            .replace("\n", "\r\n")
+        )
+
+    @staticmethod
+    def flatten(interval_list):
+        return functools.reduce(
+            lambda reduced, maya_interval: (
+                (reduced[:-1] + maya_interval.combine(reduced[-1]))
+                if reduced
+                else [maya_interval]
+            ),
+            sorted(interval_list),
+            [],
+        )
+
+    @classmethod
+    def from_datetime(cls, start_dt=None, end_dt=None, duration=None):
+        start = MayaDT.from_datetime(start_dt) if start_dt else None
+        end = MayaDT.from_datetime(end_dt) if end_dt else None
+        return cls(start=start, end=end, duration=duration)
+
+
+def now():
+    """Returns a MayaDT instance for this exact moment."""
+    epoch = time.time()
+    return MayaDT(epoch=epoch)
+
+
+def when(string, timezone="UTC", prefer_dates_from="current_period"):
+    """"Returns a MayaDT instance for the human moment specified.
+
+    Powered by dateparser. Useful for scraping websites.
+
+    Examples:
+        'next week', 'now', 'tomorrow', '300 years ago', 'August 14, 2015'
+
+    Keyword Arguments:
+        string -- string to be parsed
+        timezone -- timezone referenced from (default: 'UTC')
+        prefer_dates_from -- what dates are preferred when `string` is ambiguous.
+                             options are 'past', 'future', and 'current_period'
+                             (default: 'current_period'). see: [1]
+
+    Reference:
+        [1] dateparser.readthedocs.io/en/latest/usage.html#handling-incomplete-dates
+    """
+    settings = {
+        "TIMEZONE": timezone,
+        "RETURN_AS_TIMEZONE_AWARE": True,
+        "TO_TIMEZONE": "UTC",
+        "PREFER_DATES_FROM": prefer_dates_from,
+    }
+
+    dt = dateparser.parse(string, settings=settings)
+    if dt is None:
+        raise ValueError("invalid datetime input specified.")
+
+    return MayaDT.from_datetime(dt)
+
+
+def parse(string, timezone="UTC", day_first=False, year_first=True, strict=False):
+    """"Returns a MayaDT instance for the machine-produced moment specified.
+
+    Powered by pendulum.
+    Accepts most known formats. Useful for working with data.
+
+    Keyword Arguments:
+        string -- string to be parsed
+        timezone -- timezone referenced from (default: 'UTC')
+        day_first -- if true, the first value (e.g. 01/05/2016)
+                     is parsed as day.
+                     if year_first is set to True, this distinguishes
+                     between YDM and YMD. (default: False)
+        year_first -- if true, the first value (e.g. 2016/05/01)
+                      is parsed as year (default: True)
+        strict -- if False, allow pendulum to fall back on datetime parsing
+                  if pendulum's own parsing fails
+    """
+    options = {}
+    options["tz"] = timezone
+    options["day_first"] = day_first
+    options["year_first"] = year_first
+    options["strict"] = strict
+
+    dt = pendulum.parse(str(string), **options)
+    return MayaDT.from_datetime(dt)
+
+
+def _seconds_or_timedelta(duration):
+    """Returns `datetime.timedelta` object for the passed duration.
+
+    Keyword Arguments:
+        duration -- `datetime.timedelta` object or seconds in `int` format.
+    """
+    if isinstance(duration, int):
+        dt_timedelta = timedelta(seconds=duration)
+    elif isinstance(duration, timedelta):
+        dt_timedelta = duration
+    else:
+        raise TypeError(
+            "Expects argument as `datetime.timedelta` object "
+            "or seconds in `int` format"
+        )
+
+    return dt_timedelta
+
+
+def _translate(dt, target_locale):
+    en = default_loader.get_locale("en")
+    target = default_loader.get_locale(target_locale)
+    naturaldate = humanize.naturaldate(dt)
+
+    base = en.translate(naturaldate, settings=dateparser.conf.settings)
+
+    return target.info["relative-type"][base][-1]
+
+
+def intervals(start, end, interval):
+    """
+    Yields MayaDT objects between the start and end MayaDTs given,
+    at a given interval (seconds or timedelta).
+    """
+    interval = _seconds_or_timedelta(interval)
+    current_timestamp = start
+    while current_timestamp.epoch < end.epoch:
+        yield current_timestamp
+
+        current_timestamp = current_timestamp.add(seconds=interval.total_seconds())

test_maya.py

@@ -1,61 +0,0 @@
-import maya
-
-
-def test_rfc2822():
-    r = maya.now().rfc2822()
-    d = maya.MayaDT.from_rfc2822(r)
-    assert r == d.rfc2822()
-
-
-def test_iso8601():
-    r = maya.now().iso8601()
-    d = maya.MayaDT.from_iso8601(r)
-    assert r == d.iso8601()
-
-
-def test_human_when():
-    r1 = maya.when('yesterday')
-    r2 = maya.when('today')
-
-    assert r2.day - r1.day == 1
-
-def test_machine_parse():
-    r1 = maya.parse('August 14, 2015')
-    assert r1.day == 14
-
-    r2 = maya.parse('August 15, 2015')
-    assert r2.day == 15
-
-
-def test_dt_tz_translation():
-    d1 = maya.now().datetime()
-    d2 = maya.now().datetime(to_timezone='US/Eastern')
-    assert d1.hour - d2.hour == 5
-
-
-def test_dt_tz_naive():
-    d1 = maya.now().datetime(naive=True)
-    assert d1.tzinfo is None
-
-    d2 = maya.now().datetime(to_timezone='US/Eastern', naive=True)
-    assert d2.tzinfo is None
-    assert d1.hour - d2.hour == 5
-
-
-def test_random_date():
-    d = maya.when('11-17-11')
-    assert d.year == 2011
-    assert d.month == 11
-    assert d.day == 17
-
-
-def test_slang_date():
-    d = maya.when('tomorrow')
-    assert d.slang_date() == 'tomorrow'
-
-
-def test_slang_time():
-    d = maya.when('one hour ago')
-    assert d.slang_time() == 'an hour ago'
-
-# rand_day = maya.when('2011-02-07', timezone='US/Eastern')

tests/conftest.py

@@ -0,0 +1,98 @@
+import datetime
+
+import pytz
+from freezegun import freeze_time
+import pytest
+
+
+@pytest.fixture(
+    params=[
+        ("2018-03-25T00:00:00", 2),
+        ("2018-03-25T01:00:00", 2),
+        ("2018-03-25T02:00:00", 2),
+        ("2018-03-25T02:30:00", 2),
+        ("2018-03-25T03:00:00", 2),
+        ("2018-03-25T04:00:00", 2),
+        ("2018-10-28T00:00:00", 2),
+        ("2018-10-28T01:00:00", 2),
+        ("2018-10-28T02:00:00", 2),
+        ("2018-10-28T02:30:00", 2),
+        ("2018-10-28T03:00:00", 2),
+        ("2018-10-28T04:00:00", 2),
+    ],
+    ids=lambda x: x[0] + "_off_" + str(x[1]),
+)
+def frozen_now(request):
+    now_string, tz_offset = request.param
+    with freeze_time(now_string, tz_offset=tz_offset):
+        yield
+
+
+@pytest.fixture(params=[
+    datetime.datetime(2020, 8, 10, 22, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 10, 23, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 0, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 1, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 2, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 3, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 4, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 5, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 6, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 7, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 8, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 9, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 10, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 11, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 12, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 13, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 14, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 15, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 16, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 17, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 18, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 19, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 20, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 8, 11, 21, 2, 0, tzinfo=pytz.timezone('UTC')),
+], ids=str)
+def frozen_2020_08_11_in_paris(request):
+    """
+    fixture setting datetime.now() to every hour of the 11th of august 2020 in Paris
+    (summer time, GMT+2)
+    """
+    with freeze_time(request.param):
+        yield
+
+
+@pytest.fixture(params=[
+    datetime.datetime(2020, 2, 10, 23, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 0, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 1, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 2, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 3, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 4, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 5, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 6, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 7, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 8, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 9, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 10, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 11, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 12, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 13, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 14, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 15, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 16, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 17, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 18, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 19, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 20, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 21, 2, 0, tzinfo=pytz.timezone('UTC')),
+    datetime.datetime(2020, 2, 11, 22, 2, 0, tzinfo=pytz.timezone('UTC')),
+], ids=str)
+def frozen_2020_02_11_in_paris(request):
+    """
+    fixture setting datetime.now() to every hour of the 11th of february 2020 in Paris
+    (winter time, GMT+1)
+    """
+    with freeze_time(request.param):
+        yield

tests/test_maya.py

@@ -0,0 +1,463 @@
+import copy
+import time
+import calendar
+from datetime import timedelta, datetime as Datetime
+
+import pytz
+import pytest
+
+import maya
+from maya.core import _seconds_or_timedelta  # import private function
+
+
+@pytest.mark.parametrize(
+    "string,expected", [("February 21, 1994", "Mon, 21 Feb 1994 00:00:00 GMT")]
+)
+def test_rfc2822(string, expected):
+    r = maya.parse(string).rfc2822()
+    d = maya.MayaDT.from_rfc2822(r)
+    assert r == expected
+    assert r == d.rfc2822()
+
+
+@pytest.mark.parametrize(
+    "string,expected", [("February 21, 1994", "1994-02-21T00:00:00Z")]
+)
+def test_iso8601(string, expected):
+    r = maya.parse(string).iso8601()
+    d = maya.MayaDT.from_iso8601(r)
+    assert r == expected
+    assert r == d.iso8601()
+
+
+@pytest.mark.parametrize(
+    "string,expected",
+    [
+        ('January 1, 1970', "12.17.16.7.5"),
+        ('December 21, 2012', "13.0.0.0.0"),
+        ('March 4, 1900', "12.14.5.10.0"),
+    ],
+)
+def test_long_count(string, expected):
+    r = maya.parse(string).long_count()
+    d = maya.MayaDT.from_long_count(r)
+    assert r == expected
+    assert r == d.long_count()
+
+
+@pytest.mark.parametrize(
+    "string,expected",
+    [
+        ("20161001T1430.4+05:30", "2016-10-01T09:00:00.400000Z"),
+        ("2016T14", "2016-01-01T14:00:00Z"),
+        ("2016-10T14", "2016-10-01T14:00:00Z"),
+        ("2012W05", "2012-01-30T00:00:00Z"),
+        ("2012W055", "2012-02-03T00:00:00Z"),
+        ("2012007", "2012-01-07T00:00:00Z"),
+        ("2016-W07T09", "2016-02-15T09:00:00Z"),
+    ],
+)
+def test_parse_iso8601(string, expected):
+    d = maya.MayaDT.from_iso8601(string)
+    assert expected == d.iso8601()
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_struct():
+    now = round(time.time())
+    ts = time.gmtime(now)
+    m = maya.MayaDT.from_struct(ts)
+    dt = Datetime.fromtimestamp(now, pytz.UTC)
+    assert m._epoch is not None
+    assert m.datetime() == dt
+    ts = time.localtime(now)
+    m = maya.MayaDT.from_struct(ts)
+    dt = Datetime.fromtimestamp(time.mktime(ts) - maya.core.utc_offset(ts), pytz.UTC)
+    assert m._epoch is not None
+    assert m.datetime() == dt
+
+
+def test_issue_104():
+    e = 1507756331
+    t = Datetime.utcfromtimestamp(e)
+    t = maya.MayaDT.from_datetime(t)
+    assert str(t) == "Wed, 11 Oct 2017 21:12:11 GMT"
+    t = time.gmtime(e)
+    t = maya.MayaDT.from_struct(t)
+    assert str(t) == "Wed, 11 Oct 2017 21:12:11 GMT"
+
+def test_before_1970():
+    d1 = maya.when("1899-17-11 08:09:10")
+    assert d1.year == 1899
+    assert d1.month == 11
+    assert d1.day == 17
+    assert d1.week == 46
+    assert d1.weekday == 5
+    assert d1.hour == 8
+    assert d1.minute == 9
+    assert d1.second == 10
+    assert d1.microsecond == 0
+    # Test properties for maya.parse()
+    d2 = maya.parse("February 29, 1904 13:12:34")
+    assert d2.year == 1904
+    assert d2.month == 2
+    assert d2.day == 29
+    assert d2.week == 9
+    assert d2.weekday == 1
+    assert d2.hour == 13
+    assert d2.minute == 12
+    assert d2.second == 34
+    assert d2.microsecond == 0
+
+def test_human_when():
+    r1 = maya.when("yesterday")
+    r2 = maya.when("today")
+    assert (r2.day - r1.day) in (1, -30, -29, -28, -27)
+
+
+@pytest.mark.usefixtures("frozen_2020_08_11_in_paris")
+def test_human_when_today_with_timezone_summer_time():
+    d = maya.when("today", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris").date()) == '2020-08-11'
+
+
+@pytest.mark.usefixtures("frozen_2020_02_11_in_paris")
+def test_human_when_today_with_timezone_winter_time():
+    d = maya.when("today", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris").date()) == '2020-02-11'
+
+
+@pytest.mark.usefixtures("frozen_2020_08_11_in_paris")
+def test_human_when_yesterday_with_timezone_summer_time():
+    d = maya.when("yesterday", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris").date()) == '2020-08-10'
+
+
+@pytest.mark.usefixtures("frozen_2020_02_11_in_paris")
+def test_human_when_yesterday_with_timezone_winter_time():
+    d = maya.when("yesterday", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris").date()) == '2020-02-10'
+
+
+@pytest.mark.usefixtures("frozen_2020_08_11_in_paris")
+def test_human_when_midnight_with_timezone_summer_time():
+    d = maya.when("midnight", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris")) == '2020-08-11 00:00:00+02:00'
+
+
+@pytest.mark.usefixtures("frozen_2020_02_11_in_paris")
+def test_human_when_midnight_with_timezone_winter_time():
+    d = maya.when("midnight", timezone='Europe/Paris')
+    assert str(d.datetime(to_timezone="Europe/Paris")) == '2020-02-11 00:00:00+01:00'
+
+
+def test_machine_parse():
+    r1 = maya.parse("August 14, 2015")
+    assert r1.day == 14
+    r2 = maya.parse("August 15, 2015")
+    assert r2.day == 15
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_dt_tz_translation():
+    d1 = maya.now().datetime()
+    d2 = maya.now().datetime(to_timezone="EST")
+    assert (d1.hour - d2.hour) % 24 == 5
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_dt_tz_naive():
+    d1 = maya.now().datetime(naive=True)
+    assert d1.tzinfo is None
+    d2 = maya.now().datetime(to_timezone="EST", naive=True)
+    assert d2.tzinfo is None
+    assert (d1.hour - d2.hour) % 24 == 5
+
+
+def test_random_date():
+    # Test properties for maya.when()
+    d1 = maya.when("11-17-11 08:09:10")
+    assert d1.year == 2011
+    assert d1.month == 11
+    assert d1.day == 17
+    assert d1.week == 46
+    assert d1.weekday == 4
+    assert d1.hour == 8
+    assert d1.minute == 9
+    assert d1.second == 10
+    assert d1.microsecond == 0
+    # Test properties for maya.parse()
+    d2 = maya.parse("February 29, 1992 13:12:34")
+    assert d2.year == 1992
+    assert d2.month == 2
+    assert d2.day == 29
+    assert d2.week == 9
+    assert d2.weekday == 6
+    assert d2.hour == 13
+    assert d2.minute == 12
+    assert d2.second == 34
+    assert d2.microsecond == 0
+
+
+def test_print_date(capsys):
+    d = maya.when("11-17-11")
+    print(d)
+    out, err = capsys.readouterr()
+    assert out == "Thu, 17 Nov 2011 00:00:00 GMT\n"
+    assert repr(d) == "<MayaDT epoch=1321488000.0>"
+
+
+def test_invalid_date():
+    with pytest.raises(ValueError):
+        maya.when("another day")
+
+
+def test_slang_date():
+    d = maya.when("tomorrow")
+    assert d.slang_date() == "tomorrow"
+
+
+def test_slang_date_locale():
+    d = maya.when("tomorrow")
+    assert d.slang_date(locale="fr") == "demain"
+
+
+def test_slang_time():
+    d = maya.when("1 hour ago")
+    assert d.slang_time() == "1 hour ago"
+
+
+def test_slang_time_locale():
+    d = maya.when("1 hour ago")
+    assert d.slang_time(locale="de") == "vor 1 Stunde"
+
+
+@pytest.mark.parametrize(
+    "string,kwds,expected",
+    [
+        ("February 21, 1994", {}, "1994-02-21 00:00:00+00:00"),
+        ("01/05/2016", {}, "2016-01-05 00:00:00+00:00"),
+        ("01/05/2016", dict(day_first=True), "2016-05-01 00:00:00+00:00"),
+        (
+            "2016/05/01",
+            dict(year_first=True, day_first=False),
+            "2016-05-01 00:00:00+00:00",
+        ),
+        (
+            "2016/01/05",
+            dict(year_first=True, day_first=True),
+            "2016-05-01 00:00:00+00:00",
+        ),
+        ("01/05/2016", dict(timezone="UTC"), "2016-01-05 00:00:00+00:00"),
+        ("01/05/2016", dict(timezone="US/Central"), "2016-01-05 06:00:00+00:00"),
+    ],
+)
+def test_parse(string, kwds, expected):
+    d = maya.parse(string, **kwds)
+    assert format(d) == expected
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_when_past():
+    two_days_away = maya.now().add(days=2)
+
+    past_date = maya.when(two_days_away.slang_date(), prefer_dates_from="past")
+
+    assert past_date < maya.now()
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_when_future():
+    two_days_away = maya.now().add(days=2)
+
+    future_date = maya.when(two_days_away.slang_date(), prefer_dates_from="future")
+
+    assert future_date > maya.now()
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_when_past_day_name():
+    two_days_away = maya.now().add(days=2)
+
+    past_date = maya.when(
+        calendar.day_name[two_days_away.weekday], prefer_dates_from="past"
+    )
+
+    assert past_date < maya.now()
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_when_future_day_name():
+    two_days_away = maya.now().add(days=2)
+
+    future_date = maya.when(
+        calendar.day_name[two_days_away.weekday], prefer_dates_from="future"
+    )
+
+    assert future_date > maya.now()
+
+
+def test_datetime_to_timezone():
+    dt = maya.when("2016-01-01").datetime(to_timezone="US/Eastern")
+    assert dt.tzinfo.zone == "US/Eastern"
+
+
+def test_rfc3339_epoch():
+    mdt = maya.when("2016-01-01")
+    out = mdt.rfc3339()
+    mdt2 = maya.MayaDT.from_rfc3339(out)
+    assert mdt.epoch == mdt2.epoch
+
+
+def test_rfc3339_format():
+    rfc3339 = maya.MayaDT.rfc3339(maya.when("2016-01-01T12:03:03Z"))
+    # it's important that the string has got a "max 1-digit millis" fragment
+    # as per https://tools.ietf.org/html/rfc3339#section-5.6
+    assert rfc3339 == "2016-01-01T12:03:03.0Z"
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_comparison_operations():
+    now = maya.now()
+    now_copy = copy.deepcopy(now)
+    tomorrow = maya.when("tomorrow")
+    assert (now == now_copy) is True
+    assert (now == tomorrow) is False
+    assert (now != now_copy) is False
+    assert (now != tomorrow) is True
+    assert (now < now_copy) is False
+    assert (now < tomorrow) is True
+    assert (now <= now_copy) is True
+    assert (now <= tomorrow) is True
+    assert (now > now_copy) is False
+    assert (now > tomorrow) is False
+    assert (now >= now_copy) is True
+    assert (now >= tomorrow) is False
+    # Check Exceptions
+    with pytest.raises(TypeError):
+        now == 1
+    with pytest.raises(TypeError):
+        now != 1
+    with pytest.raises(TypeError):
+        now < 1
+    with pytest.raises(TypeError):
+        now <= 1
+    with pytest.raises(TypeError):
+        now > 1
+    with pytest.raises(TypeError):
+        now >= 1
+
+
+def test_seconds_or_timedelta():
+    # test for value in seconds
+    assert _seconds_or_timedelta(1234) == timedelta(0, 1234)
+    # test for value as `datetime.timedelta`
+    assert _seconds_or_timedelta(timedelta(0, 1234)) == timedelta(0, 1234)
+    # test for invalid value
+    with pytest.raises(TypeError):
+        _seconds_or_timedelta("invalid interval")
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_intervals():
+    now = maya.now()
+    tomorrow = now.add(days=1)
+    assert len(list(maya.intervals(now, tomorrow, 60 * 60))) == 24
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_dunder_add():
+    now = maya.now()
+    assert now + 1 == now.add(seconds=1)
+    assert now + timedelta(seconds=1) == now.add(seconds=1)
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_dunder_radd():
+    now = maya.now()
+    assert now.add(seconds=1) == now + 1
+    assert now.add(seconds=1) == now + timedelta(seconds=1)
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_dunder_sub():
+    now = maya.now()
+    assert now - 1 == now.subtract(seconds=1)
+    assert now - timedelta(seconds=1) == now.subtract(seconds=1)
+
+
+@pytest.mark.usefixtures("frozen_now")
+def test_mayaDT_sub():
+    now = maya.now()
+    then = now.add(days=1)
+    assert then - now == timedelta(seconds=24 * 60 * 60)
+    assert now - then == timedelta(seconds=-24 * 60 * 60)
+
+
+def test_core_local_timezone(monkeypatch):
+    @property
+    def mock_local_tz(self):
+        class StaticTzInfo(object):
+            zone = "local"
+
+            def __repr__(self):
+                return "<StaticTzInfo 'local'>"
+
+        return StaticTzInfo()
+
+    monkeypatch.setattr(maya.MayaDT, "_local_tz", mock_local_tz)
+    mdt = maya.MayaDT(0)
+    assert mdt.local_timezone == "UTC"
+
+
+def test_getting_datetime_for_local_timezone(monkeypatch):
+    @property
+    def mock_local_tz(self):
+        class StaticTzInfo(object):
+            zone = "Europe/Zurich"
+
+            def __repr__(self):
+                return "<StaticTzInfo 'Europe/Zurich'>"
+
+        return StaticTzInfo()
+
+    monkeypatch.setattr(maya.MayaDT, "_local_tz", mock_local_tz)
+
+    d = maya.parse("1994-02-21T12:00:00+05:30")
+
+    dt = pytz.timezone("Europe/Zurich").localize(Datetime(1994, 2, 21, 7, 30))
+
+    assert d.local_datetime() == dt
+
+
+@pytest.mark.parametrize(
+    "when_str,snap_str,expected_when",
+    [("Mon, 21 Feb 1994 21:21:42 GMT", "@d", "Mon, 21 Feb 1994 00:00:00 GMT")],
+)
+def test_snaptime(when_str, snap_str, expected_when):
+    # given
+    dt = maya.when(when_str)
+    # when
+    dt = dt.snap(snap_str)
+    # then
+    assert dt == maya.when(expected_when)
+
+
+@pytest.mark.parametrize(
+    "when_str,snap_str,timezone,expected_when",
+    [
+        (
+            "Mon, 21 Feb 1994 21:21:42 GMT",
+            "@d",
+            "Australia/Perth",
+            "Mon, 21 Feb 1994 16:00:00 GMT",
+        )
+    ],
+)
+def test_snaptime_tz(when_str, snap_str, timezone, expected_when):
+    # given
+    dt = maya.when(when_str)
+    # when
+    dt = dt.snap_tz(snap_str, timezone)
+    # then
+    assert dt == maya.when(expected_when)

tests/test_maya_interval.py

@@ -0,0 +1,561 @@
+import random
+from datetime import datetime, timedelta
+
+import pytest
+import pytz
+
+import maya
+from maya.compat import cmp
+
+Los_Angeles = pytz.timezone("America/Los_Angeles")
+New_York = pytz.timezone("America/New_York")
+Melbourne = pytz.timezone("Australia/Melbourne")
+
+
+def test_interval_requires_2_of_start_end_duration():
+    start = maya.now()
+    end = start.add(hours=1)
+    with pytest.raises(ValueError):
+        maya.MayaInterval(start=start)
+    with pytest.raises(ValueError):
+        maya.MayaInterval(end=end)
+    with pytest.raises(ValueError):
+        maya.MayaInterval(duration=60)
+    with pytest.raises(ValueError):
+        maya.MayaInterval(start=start, end=end, duration=60)
+    maya.MayaInterval(start=start, end=end)
+    maya.MayaInterval(start=start, duration=60)
+    maya.MayaInterval(end=end, duration=60)
+
+
+def test_interval_requires_end_time_after_or_on_start_time():
+    with pytest.raises(ValueError):
+        maya.MayaInterval(start=maya.now(), duration=0)
+        maya.MayaInterval(start=maya.now(), duration=-1)
+
+
+def test_interval_init_start_end():
+    start = maya.now()
+    end = start.add(hours=1)
+    interval = maya.MayaInterval(start=start, end=end)
+    assert interval.start == start
+    assert interval.end == end
+
+
+def test_interval_init_start_duration():
+    start = maya.now()
+    duration = 1
+    interval = maya.MayaInterval(start=start, duration=duration)
+    assert interval.start == start
+    assert interval.end == start.add(seconds=duration)
+
+
+def test_interval_init_end_duration():
+    end = maya.now()
+    duration = 1
+    interval = maya.MayaInterval(end=end, duration=duration)
+    assert interval.end == end
+    assert interval.start == end.subtract(seconds=duration)
+
+
+@pytest.mark.parametrize(
+    "start_doy1,end_doy1,start_doy2,end_doy2,intersection_doys",
+    (
+        (0, 2, 1, 3, (1, 2)),
+        (0, 2, 3, 4, None),
+        (0, 2, 2, 3, None),
+        (0, 1, 0, 1, (0, 1)),
+        (1, 1, 1, 3, (1, 1)),
+        (1, 1, 1, 1, (1, 1)),
+        (1, 1, 2, 3, None),
+        (2, 2, 1, 3, (2, 2)),
+        (1, 3, 1, 1, (1, 1)),
+        (2, 3, 1, 1, None),
+        (1, 3, 2, 2, (2, 2)),
+    ),
+    ids=(
+        "overlapping",
+        "non-overlapping",
+        "adjacent",
+        "equal",
+        "instant overlapping start only",
+        "instant equal",
+        "instant disjoint",
+        "instant overlapping",
+        "instant overlapping start only (left)",
+        "instant disjoint (left)",
+        "instant overlapping (left)",
+    ),
+)
+def test_interval_intersection(
+    start_doy1, end_doy1, start_doy2, end_doy2, intersection_doys
+):
+    base = maya.MayaDT.from_datetime(datetime(2016, 1, 1))
+    interval1 = maya.MayaInterval(base.add(days=start_doy1), base.add(days=end_doy1))
+    interval2 = maya.MayaInterval(base.add(days=start_doy2), base.add(days=end_doy2))
+    if intersection_doys:
+        start_doy_intersection, end_doy_intersection = intersection_doys
+        assert interval1 & interval2 == maya.MayaInterval(
+            base.add(days=start_doy_intersection), base.add(days=end_doy_intersection)
+        )
+    else:
+        assert (interval1 & interval2) is None
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval1 & "invalid type"
+
+
+def test_interval_intersects():
+    base = maya.MayaDT.from_datetime(datetime(2016, 1, 1))
+    interval = maya.MayaInterval(base, base.add(days=1))
+    assert interval.intersects(interval)
+    assert not interval.intersects(
+        maya.MayaInterval(base.add(days=2), base.add(days=3))
+    )
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval.intersects("invalid type")
+
+
+def test_and_operator():
+    base = maya.MayaDT.from_datetime(datetime(2016, 1, 1))
+    interval1 = maya.MayaInterval(base, base.add(days=2))
+    interval2 = maya.MayaInterval(base.add(days=1), base.add(days=3))
+    assert (
+        interval1 & interval2
+        == interval2 & interval1  # noqa
+        == interval1.intersection(interval2)  # noqa
+    )
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval1.intersection("invalid type")
+
+
+def test_interval_eq_operator():
+    start = maya.now()
+    end = start.add(hours=1)
+    interval = maya.MayaInterval(start=start, end=end)
+    assert interval == maya.MayaInterval(start=start, end=end)
+    assert interval != maya.MayaInterval(start=start, end=end.add(days=1))
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval == "invalid type"
+    with pytest.raises(TypeError):
+        interval != "invalid type"
+
+
+def test_interval_timedelta():
+    start = maya.now()
+    delta = timedelta(hours=1)
+    interval = maya.MayaInterval(start=start, duration=delta)
+    assert interval.timedelta == delta
+
+
+def test_interval_duration():
+    start = maya.now()
+    delta = timedelta(hours=1)
+    interval = maya.MayaInterval(start=start, duration=delta)
+    assert interval.duration == delta.total_seconds()
+
+
+@pytest.mark.parametrize(
+    "start_doy1,end_doy1,start_doy2,end_doy2,expected",
+    (
+        (0, 2, 1, 3, False),
+        (0, 2, 3, 4, False),
+        (0, 2, 2, 3, False),
+        (0, 1, 0, 1, True),
+        (0, 3, 1, 2, True),
+    ),
+    ids=("overlapping", "non-overlapping", "adjacent", "equal", "subset"),
+)
+def test_interval_contains(start_doy1, end_doy1, start_doy2, end_doy2, expected):
+    base = maya.MayaDT.from_datetime(datetime(2016, 1, 1))
+    interval1 = maya.MayaInterval(base.add(days=start_doy1), base.add(days=end_doy1))
+    interval2 = maya.MayaInterval(base.add(days=start_doy2), base.add(days=end_doy2))
+    assert interval1.contains(interval2) is expected
+    assert (interval2 in interval1) is expected
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval1.contains("invalid type")
+
+
+@pytest.mark.parametrize(
+    "start_doy,end_doy,dt_doy,expected",
+    (
+        (2, 4, 1, False),
+        (2, 4, 2, True),
+        (2, 4, 3, True),
+        (2, 4, 4, False),
+        (2, 4, 5, False),
+    ),
+    ids=("before-start", "on-start", "during", "on-end", "after-end"),
+)
+def test_interval_in_operator_maya_dt(start_doy, end_doy, dt_doy, expected):
+    base = maya.MayaDT.from_datetime(datetime(2016, 1, 1))
+    interval = maya.MayaInterval(
+        start=base.add(days=start_doy), end=base.add(days=end_doy)
+    )
+    dt = base.add(days=dt_doy)
+    assert (dt in interval) is expected
+    # check invalid argument
+    with pytest.raises(TypeError):
+        "invalid type" in interval
+
+
+def test_interval_hash():
+    start = maya.now()
+    end = start.add(hours=1)
+    interval = maya.MayaInterval(start=start, end=end)
+    assert hash(interval) == hash(maya.MayaInterval(start=start, end=end))
+    assert hash(interval) != hash(maya.MayaInterval(start=start, end=end.add(days=1)))
+
+
+def test_interval_iter():
+    start = maya.now()
+    end = start.add(days=1)
+    assert tuple(maya.MayaInterval(start=start, end=end)) == (start, end)
+
+
+@pytest.mark.parametrize(
+    "start1,end1,start2,end2,expected",
+    [(1, 2, 1, 2, 0), (1, 3, 2, 4, -1), (2, 4, 1, 3, 1), (1, 2, 1, 3, -1)],
+    ids=("equal", "less-than", "greater-than", "use-end-time-if-start-time-identical"),
+)
+def test_interval_cmp(start1, end1, start2, end2, expected):
+    base = maya.now()
+    interval1 = maya.MayaInterval(start=base.add(days=start1), end=base.add(days=end1))
+    interval2 = maya.MayaInterval(start=base.add(days=start2), end=base.add(days=end2))
+    assert cmp(interval1, interval2) == expected
+    # check invalid argument
+    with pytest.raises(TypeError):
+        cmp(interval1, "invalid type")
+
+
+@pytest.mark.parametrize(
+    "start1,end1,start2,end2,expected",
+    [
+        (1, 2, 2, 3, [(1, 3)]),
+        (1, 3, 2, 4, [(1, 4)]),
+        (1, 2, 3, 4, [(1, 2), (3, 4)]),
+        (1, 5, 2, 3, [(1, 5)]),
+    ],
+    ids=("adjacent", "overlapping", "non-overlapping", "contains"),
+)
+def test_interval_combine(start1, end1, start2, end2, expected):
+    base = maya.now()
+    interval1 = maya.MayaInterval(start=base.add(days=start1), end=base.add(days=end1))
+    interval2 = maya.MayaInterval(start=base.add(days=start2), end=base.add(days=end2))
+    expected_intervals = [
+        maya.MayaInterval(start=base.add(days=start), end=base.add(days=end))
+        for start, end in expected
+    ]
+    assert interval1.combine(interval2) == expected_intervals
+    assert interval2.combine(interval1) == expected_intervals
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval2.combine("invalid type")
+
+
+@pytest.mark.parametrize(
+    "start1,end1,start2,end2,expected",
+    [
+        (1, 2, 3, 4, [(1, 2)]),
+        (1, 2, 2, 4, [(1, 2)]),
+        (2, 3, 1, 4, []),
+        (1, 4, 2, 3, [(1, 2), (3, 4)]),
+        (1, 4, 0, 2, [(2, 4)]),
+        (1, 4, 3, 5, [(1, 3)]),
+        (1, 4, 1, 2, [(2, 4)]),
+        (1, 4, 3, 4, [(1, 3)]),
+    ],
+    ids=(
+        "non-overlapping",
+        "adjacent",
+        "contains",
+        "splits",
+        "overlaps-left",
+        "overlaps-right",
+        "overlaps-left-identical-start",
+        "overlaps-right-identical-end",
+    ),
+)
+def test_interval_subtract(start1, end1, start2, end2, expected):
+    base = maya.now()
+    interval1 = maya.MayaInterval(start=base.add(days=start1), end=base.add(days=end1))
+    interval2 = maya.MayaInterval(start=base.add(days=start2), end=base.add(days=end2))
+    expected_intervals = [
+        maya.MayaInterval(start=base.add(days=start), end=base.add(days=end))
+        for start, end in expected
+    ]
+    assert interval1.subtract(interval2) == expected_intervals
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval1.subtract("invalid type")
+
+
+@pytest.mark.parametrize(
+    "start1,end1,start2,end2,expected",
+    [(1, 2, 2, 3, True), (2, 3, 1, 2, True), (1, 3, 2, 3, False), (2, 3, 4, 5, False)],
+    ids=("adjacent-right", "adjacent-left", "overlapping", "non-overlapping"),
+)
+def test_interval_is_adjacent(start1, end1, start2, end2, expected):
+    base = maya.now()
+    interval1 = maya.MayaInterval(start=base.add(days=start1), end=base.add(days=end1))
+    interval2 = maya.MayaInterval(start=base.add(days=start2), end=base.add(days=end2))
+    assert interval1.is_adjacent(interval2) == expected
+    # check invalid argument
+    with pytest.raises(TypeError):
+        interval1.is_adjacent("invalid type")
+
+
+@pytest.mark.parametrize(
+    "start,end,delta,include_remainder,expected",
+    [
+        (0, 10, 5, False, [(0, 5), (5, 10)]),
+        (0, 10, 5, True, [(0, 5), (5, 10)]),
+        (0, 10, 3, False, [(0, 3), (3, 6), (6, 9)]),
+        (0, 10, 3, True, [(0, 3), (3, 6), (6, 9), (9, 10)]),
+        (0, 2, 5, False, []),
+        (0, 2, 5, True, [(0, 2)]),
+    ],
+    ids=(
+        "even-split",
+        "even-split-include-partial",
+        "uneven-split-do-not-include-partial",
+        "uneven-split-include-partial",
+        "delta-larger-than-timepsan-do-not-include-partial",
+        "delta-larger-than-timepsan-include-partial",
+    ),
+)
+def test_interval_split(start, end, delta, include_remainder, expected):
+    base = maya.now()
+    interval = maya.MayaInterval(start=base.add(days=start), end=base.add(days=end))
+    delta = timedelta(days=delta)
+    expected_intervals = [
+        maya.MayaInterval(start=base.add(days=s), end=base.add(days=e))
+        for s, e in expected
+    ]
+    assert expected_intervals == list(
+        interval.split(delta, include_remainder=include_remainder)
+    )
+
+
+def test_interval_split_non_positive_delta():
+    start = maya.now()
+    end = start.add(days=1)
+    interval = maya.MayaInterval(start=start, end=end)
+    with pytest.raises(ValueError):
+        list(interval.split(timedelta(seconds=0)))
+    with pytest.raises(ValueError):
+        list(interval.split(timedelta(seconds=-10)))
+
+
+@pytest.mark.parametrize(
+    "start,end,minutes,timezone,snap_out,expected_start,expected_end",
+    [
+        ((5, 12), (8, 48), 30, None, False, (5, 30), (8, 30)),
+        ((5, 12), (8, 48), 30, None, True, (5, 0), (9, 0)),
+        ((5, 15), (9, 0), 15, None, False, (5, 15), (9, 0)),
+        ((5, 15), (9, 0), 15, None, True, (5, 15), (9, 0)),
+        ((6, 50), (9, 15), 60, "America/New_York", False, (7, 0), (9, 0)),
+        ((6, 50), (9, 15), 60, "America/New_York", True, (6, 0), (10, 0)),
+        ((6, 20), (6, 50), 60, None, False, (6, 0), (6, 0)),
+        ((6, 20), (6, 50), 60, None, True, (6, 0), (7, 0)),
+        ((6, 20), (6, 50), 60, "America/Chicago", False, (6, 0), (6, 0)),
+        ((6, 20), (6, 50), 60, "America/Chicago", True, (6, 0), (7, 0)),
+    ],
+    ids=(
+        "normal",
+        "normal-snap_out",
+        "already-quantized",
+        "already-quantized-snap_out",
+        "with-timezone",
+        "with-timezone-snap_out",
+        "too-small",
+        "too-small-snap_out",
+        "too-small-with-timezone",
+        "too-small-with-timezone-snap_out",
+    ),
+)
+def test_quantize(
+    start, end, minutes, timezone, snap_out, expected_start, expected_end
+):
+    base = maya.MayaDT.from_datetime(datetime(2017, 1, 1))
+    interval = maya.MayaInterval(
+        start=base.add(hours=start[0], minutes=start[1]),
+        end=base.add(hours=end[0], minutes=end[1]),
+    )
+    kwargs = {"timezone": timezone} if timezone is not None else {}
+    quantized_interval = interval.quantize(
+        timedelta(minutes=minutes), snap_out=snap_out, **kwargs
+    )
+    assert quantized_interval == maya.MayaInterval(
+        start=base.add(hours=expected_start[0], minutes=expected_start[1]),
+        end=base.add(hours=expected_end[0], minutes=expected_end[1]),
+    )
+
+
+def test_quantize_invalid_delta():
+    start = maya.now()
+    end = start.add(days=1)
+    interval = maya.MayaInterval(start=start, end=end)
+    with pytest.raises(ValueError):
+        interval.quantize(timedelta(minutes=0))
+    with pytest.raises(ValueError):
+        interval.quantize(timedelta(minutes=-1))
+
+
+def test_interval_flatten_non_overlapping():
+    step = 2
+    max_hour = 20
+    base = maya.now()
+    intervals = [
+        maya.MayaInterval(
+            start=base.add(hours=hour), duration=timedelta(hours=step - 1)
+        )
+        for hour in range(0, max_hour, step)
+    ]
+    random.shuffle(intervals)
+    assert maya.MayaInterval.flatten(intervals) == sorted(intervals)
+
+
+def test_interval_flatten_adjacent():
+    step = 2
+    max_hour = 20
+    base = maya.when("jan/1/2011")
+    intervals = [
+        maya.MayaInterval(start=base.add(hours=hour), duration=timedelta(hours=step))
+        for hour in range(0, max_hour, step)
+    ]
+    random.shuffle(intervals)
+    assert maya.MayaInterval.flatten(intervals) == [
+        maya.MayaInterval(start=base, duration=timedelta(hours=max_hour))
+    ]
+
+
+def test_interval_flatten_intersecting():
+    step = 2
+    max_hour = 20
+    base = maya.now()
+    intervals = [
+        maya.MayaInterval(
+            start=base.add(hours=hour), duration=timedelta(hours=step, minutes=30)
+        )
+        for hour in range(0, max_hour, step)
+    ]
+    random.shuffle(intervals)
+    assert maya.MayaInterval.flatten(intervals) == [
+        maya.MayaInterval(start=base, duration=timedelta(hours=max_hour, minutes=30))
+    ]
+
+
+def test_interval_flatten_containing():
+    step = 2
+    max_hour = 20
+    base = maya.now()
+    containing_interval = maya.MayaInterval(
+        start=base, end=base.add(hours=max_hour + step)
+    )
+    intervals = [
+        maya.MayaInterval(
+            start=base.add(hours=hour), duration=timedelta(hours=step - 1)
+        )
+        for hour in range(2, max_hour, step)
+    ]
+    intervals.append(containing_interval)
+    random.shuffle(intervals)
+    assert maya.MayaInterval.flatten(intervals) == [containing_interval]
+
+
+def test_interval_from_datetime():
+    start = maya.now()
+    duration = timedelta(hours=1)
+    end = start + duration
+    interval = maya.MayaInterval.from_datetime(
+        start_dt=start.datetime(naive=False), end_dt=end.datetime(naive=False)
+    )
+    assert interval.start == start
+    assert interval.end == end
+    interval2 = maya.MayaInterval.from_datetime(
+        start_dt=start.datetime(naive=False), duration=duration
+    )
+    assert interval2.start == start
+    assert interval2.end == end
+    interval3 = maya.MayaInterval.from_datetime(
+        end_dt=end.datetime(naive=False), duration=duration
+    )
+    assert interval3.start == start
+    assert interval3.end == end
+
+
+def test_interval_iso8601():
+    start = maya.when("11-17-11 08:09:10")
+    interval = maya.MayaInterval(start=start, duration=1)
+    assert interval.iso8601() == "2011-11-17T08:09:10Z/2011-11-17T08:09:11Z"
+
+
+def test_interval_from_iso8601():
+    interval = maya.MayaInterval.from_iso8601(
+        "2018-03-18T14:27:18Z/2018-04-01T04:15:27Z"
+    )
+    s = maya.when("2018-03-18T14:27:18Z")
+    e = maya.when("2018-04-01T04:15:27Z")
+
+    assert interval.start == s
+    assert interval.end == e
+
+
+def test_interval_from_iso8601_duration():
+    interval = maya.MayaInterval.from_iso8601("2018-03-18T14:27:18Z/P13DT13H48M9S")
+    s = maya.when("2018-03-18T14:27:18Z")
+    e = maya.when("2018-04-01T04:15:27Z")
+
+    assert interval.start == s
+    assert interval.end == e
+
+    interval = maya.MayaInterval.from_iso8601("2018-03-05T14:27:18Z/P2W")
+    s = maya.when("2018-03-05T14:27:18Z")
+    e = maya.when("2018-03-19T14:27:18Z")
+
+    assert interval.start == s
+    assert interval.end == e
+
+
+@pytest.mark.parametrize(
+    "start_string,end_string,interval,expected_count",
+    [
+        ("2019-01-03 11:40:00Z", "2019-01-03 11:40:20Z", 2, 10),
+        ("2019-01-03 11:40:00Z", "2019-01-03 11:40:30Z", timedelta(seconds=2), 15),
+        ("2019-01-03 11:40:00Z", "2019-01-03 11:45:00Z", 2 * 60, 3),
+        ("2019-01-03 11:40:00Z", "2019-01-03 11:51:00Z", timedelta(minutes=1), 11),
+        ("2019-01-03 11:40:00Z", "2019-01-03 21:40:00Z", 3 * 60 * 60, 4),
+        ("2019-01-03 11:40:00Z", "2019-01-03 13:41:00Z", timedelta(hours=1), 3),
+        ("2019-01-03 11:40:00Z", "2019-01-09 11:40:00Z", 3 * 60 * 60 * 24, 2),
+        ("2019-01-03 11:40:00Z", "2019-01-05 12:00:00Z", timedelta(days=2), 2),
+    ],
+    ids=(
+        "seconds",
+        "seconds-timedelta",
+        "minutes",
+        "minutes-timedelta",
+        "hours",
+        "hours-timedelta",
+        "days",
+        "days-timedelta",
+    ),
+)
+def test_intervals(start_string, end_string, interval, expected_count):
+    start = maya.parse(start_string)
+    end = maya.parse(end_string)
+    assert len(list(maya.intervals(start, end, interval))) == expected_count
+
+
+def test_issue_168_regression():
+    start = maya.now()
+    end = start.add(weeks=1)
+    gen = maya.intervals(start=start, end=end, interval=60 * 60 * 24)
+    # Since the bug causes the generator to never end, first sanity
+    # check that two results are not the same.
+    assert next(gen) != next(gen)
+    assert len(list(maya.intervals(start=start, end=end, interval=60 * 60 * 24))) == 7

tox.ini

@@ -0,0 +1,43 @@
+[tox]
+envlist = lint,manifest,py27,py35,py36,py37,docs,coverage-report
+
+
+[testenv]
+# Prevent random setuptools/pip breakages like
+# https://github.com/pypa/setuptools/issues/1042 from breaking our builds.
+setenv =
+    VIRTUALENV_NO_DOWNLOAD=1
+extras = {env:TOX_AP_TEST_EXTRAS:tests}
+commands = coverage run --parallel -m pytest {posargs}
+
+
+[testenv:coverage-report]
+basepython = python3.7
+skip_install = true
+deps = coverage
+commands =
+    coverage combine
+    coverage report
+
+
+[testenv:lint]
+basepython = python3.7
+skip_install = true
+deps = pre-commit
+passenv = HOMEPATH  # needed on Windows
+commands = pre-commit run --all-files
+
+
+[testenv:docs]
+basepython = python3.7
+extras = docs
+commands =
+    sphinx-build -W -b html -d {envtmpdir}/doctrees docs/source docs/_build/html
+    ;sphinx-build -W -b doctest -d {envtmpdir}/doctrees docs/source docs/_build/html
+
+
+[testenv:manifest]
+basepython = python3.7
+deps = check-manifest
+skip_install = true
+commands = check-manifest