Expose 'read_only' parameter for 'import_set' and 'import_book' (#483)

* Upload coverage from GHA

* Fix PytestConfigWarning: Unknown config option: python_paths

.github/workflows/docs-lint.yml

@@ -2,23 +2,39 @@ name: Docs and lint
 
 on: [push, pull_request]
 
+env:
+  FORCE_COLOR: 1
+
 jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8]
         env:
         - TOXENV: docs
         - TOXENV: lint
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
 
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+      - name: Set up Python
+        uses: actions/setup-python@v2
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: 3.9
+
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key:
+            ${{ matrix.os }}-${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}
+          restore-keys: |
+            ${{ matrix.os }}-${{ matrix.python-version }}-v1-
 
       - name: Install dependencies
         run: |

.github/workflows/release.yml

@@ -0,0 +1,56 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - master
+  release:
+    types:
+      - published
+
+jobs:
+  build:
+    if: github.repository == 'jazzband/tablib'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: release-${{ hashFiles('**/setup.py') }}
+          restore-keys: |
+            release-
+
+      - name: Install dependencies
+        run: |
+          python -m pip install -U pip
+          python -m pip install -U setuptools twine wheel
+
+      - name: Build package
+        run: |
+          python setup.py --version
+          python setup.py sdist --format=gztar bdist_wheel
+          twine check dist/*
+
+      - name: Upload packages to Jazzband
+        if: github.event.action == 'published'
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: jazzband
+          password: ${{ secrets.JAZZBAND_RELEASE_KEY }}
+          repository_url: https://jazzband.co/projects/tablib/upload

.github/workflows/test.yml

@@ -2,24 +2,40 @@ name: Test
 
 on: [push, pull_request]
 
+env:
+  FORCE_COLOR: 1
+
 jobs:
   build:
-
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key:
+          ${{ matrix.os }}-${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}
+        restore-keys: |
+          ${{ matrix.os }}-${{ matrix.python-version }}-v1-
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -30,3 +46,8 @@ jobs:
       shell: bash
       run: |
         tox -e py
+
+    - name: Upload coverage
+      uses: codecov/codecov-action@v1
+      with:
+        name: ${{ matrix.os }} Python ${{ matrix.python-version }}

.gitignore

@@ -38,3 +38,6 @@ htmlcov
 # setuptools noise
 .eggs
 *.egg-info
+
+# generated by setuptools-scm
+/src/tablib/_version.py

.pre-commit-config.yaml

@@ -1,24 +1,24 @@
 repos:
   - repo: https://github.com/asottile/pyupgrade
-    rev: v1.26.2
+    rev: v2.7.3
     hooks:
       - id: pyupgrade
-        args: ["--py3-plus"]
+        args: ["--py36-plus"]
 
-  - repo: https://github.com/pre-commit/mirrors-isort
-    rev: v4.3.21
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.6.4
     hooks:
       - id: isort
         additional_dependencies: [toml]
 
   - repo: https://github.com/pre-commit/pygrep-hooks
-    rev: v1.4.4
+    rev: v1.7.0
     hooks:
       - id: python-check-blanket-noqa
       - id: rst-backticks
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.4.0
+    rev: v3.3.0
     hooks:
       - id: check-merge-conflict
       - id: check-toml

.travis.yml

@@ -1,38 +0,0 @@
-language: python
-cache:
-  pip: true
-  directories:
-    - $HOME/.cache/pre-commit
-
-matrix:
-  fast_finish: true
-  include:
-    - python: 3.8
-      env: TOXENV=docs
-    - python: 3.8
-      env: TOXENV=lint
-    - python: 3.8
-    - python: 3.7
-    - python: 3.6
-
-install: travis_retry pip install tox-travis
-
-script: tox
-
-after_success:
-  - |
-    if [[ "$TOXENV" != "docs" && "$TOXENV" != "lint" ]]; then
-      bash <(curl -s https://codecov.io/bash)
-    fi
-
-deploy:
-  provider: pypi
-  user: jazzband
-  server: https://jazzband.co/projects/tablib/upload
-  distributions: sdist bdist_wheel
-  password:
-    secure: svV4fYtodwW+iTyFOm5ISEfhVwcA+6vTskD3x6peznc40TdMV9Ek8nT3Q/NB4lCbXoUw2qR4H6uhLCjesnv/VvVk/qbitCyD8ySlgwOV5n7NzJs8lC8EYaHSjGQjatTwJAokfGVYkPawkI7HXDqtDggLUQBK+Ag8HDW+XBSbQIU=
-  on:
-    tags: true
-    repo: jazzband/tablib
-    python: 3.7

HISTORY.md

@@ -1,5 +1,20 @@
 # History
 
+## Unreleased
+
+### Breaking changes
+
+- Dropped Python 3.5 support
+
+### Improvements
+
+- Added Python 3.9 support
+- Added read_only option to xlsx file reader (#482).
+
+### Bugfixes
+
+- Prevented crash in rst export with only-space strings (#469).
+
 ## 2.0.0 (2020-05-16)
 
 ### Breaking changes

README.md

@@ -4,7 +4,6 @@
 [![PyPI version](https://img.shields.io/pypi/v/tablib.svg)](https://pypi.org/project/tablib/)
 [![Supported Python versions](https://img.shields.io/pypi/pyversions/tablib.svg)](https://pypi.org/project/tablib/)
 [![PyPI downloads](https://img.shields.io/pypi/dm/tablib.svg)](https://pypistats.org/packages/tablib)
-[![Travus CI status](https://img.shields.io/travis/jazzband/tablib/master?label=Travis%20CI&logo=travis)](https://travis-ci.org/jazzband/tablib)
 [![GitHub Actions status](https://github.com/jazzband/tablib/workflows/Test/badge.svg)](https://github.com/jazzband/tablib/actions)
 [![codecov](https://codecov.io/gh/jazzband/tablib/branch/master/graph/badge.svg)](https://codecov.io/gh/jazzband/tablib)
 [![GitHub](https://img.shields.io/github/license/jazzband/tablib.svg)](LICENSE)

RELEASING.md

@@ -3,9 +3,9 @@
 Jazzband guidelines: https://jazzband.co/about/releases
 
 * [ ] Get master to the appropriate code release state.
-      [Travis CI](https://travis-ci.org/jazzband/tablib)
+      [GitHub Actions](https://github.com/jazzband/tablib/actions)
       should pass on master.
-      [![Build Status](https://travis-ci.org/jazzband/tablib.svg?branch=master)](https://travis-ci.org/jazzband/tablib)
+      [![GitHub Actions status](https://github.com/jazzband/tablib/workflows/Test/badge.svg)](https://github.com/jazzband/tablib/actions)
 
 * [ ] Check [HISTORY.md](https://github.com/jazzband/tablib/blob/master/HISTORY.md),
       update version number and release date
@@ -16,7 +16,7 @@ git tag -a v0.14.0 -m v0.14.0
 git push --tags
 ```
 
-* [ ] Once Travis CI has built and uploaded distributions, check files at
+* [ ] Once GitHub Actions has built and uploaded distributions, check files at
       [Jazzband](https://jazzband.co/projects/tablib) and release to
       [PyPI](https://pypi.org/pypi/tablib)
 

docs/_templates/sidebarintro.html

@@ -8,4 +8,5 @@
   <li><a href="https://pypi.org/project/tablib">Tablib @ PyPI</a></li>
   <li><a href="https://github.com/jazzband/tablib">Tablib @ GitHub</a></li>
   <li><a href="https://github.com/jazzband/tablib/issues">Issue Tracker</a></li>
+  <li><a href="https://github.com/jazzband/tablib/blob/master/HISTORY.md">Changelog</a></li>
 </ul>

docs/conf.py

@@ -9,7 +9,7 @@
 #
 # All configuration values have a default; values that are commented out
 # serve to show the default.
-from pkg_resources import get_distribution
+import tablib
 
 # 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
@@ -49,9 +49,9 @@ copyright = '2019 Jazzband'
 # built documents.
 #
 # The full version, including alpha/beta/rc tags.
-release = get_distribution('tablib').version
+release = tablib.__version__
 # The short X.Y version.
-version = '.'.join(release.split('.')[:2])
+version = '.'.join(tablib.__version__.split('.')[:2])
 # for example take major/minor
 
 # The language for content autogenerated by Sphinx. Refer to documentation

docs/development.rst

@@ -163,16 +163,16 @@ the easiest way to test your changes for potential issues is to simply run the t
 Continuous Integration
 ----------------------
 
-Every pull request is automatically tested and inspected upon receipt with `Travis CI`_.
+Every pull request is automatically tested and inspected upon receipt with `GitHub Actions`_.
 If you broke the build, you will receive an email accordingly.
 
 Anyone may view the build status and history at any time.
 
-    https://travis-ci.org/jazzband/tablib
+    https://github.com/jazzband/tablib/actions
 
 Additional reports will also be included here in the future, including :pep:`8` checks and stress reports for extremely large datasets.
 
-.. _`Travis CI`: https://travis-ci.org/
+.. _`GitHub Actions`: https://github.com/jazzband/tablib/actions
 
 
 .. _docs:

docs/formats.rst

@@ -27,7 +27,7 @@ For example::
     dataset.export("cli", tablefmt="github")
     dataset.export("cli", tablefmt="grid")
 
-This format is optional, install Tablib with ``pip install tablib[cli]`` to
+This format is optional, install Tablib with ``pip install "tablib[cli]"`` to
 make the format available.
 
 csv
@@ -83,7 +83,7 @@ df (DataFrame)
 ==============
 
 Import/export using the pandas_ DataFrame format. This format is optional,
-install Tablib with ``pip install tablib[pandas]`` to make the format available.
+install Tablib with ``pip install "tablib[pandas]"`` to make the format available.
 
 .. _pandas: https://pandas.pydata.org/
 
@@ -94,7 +94,7 @@ The ``html`` format is currently export-only. The exports produce an HTML page
 with the data in a ``<table>``. If headers have been set, they will be used as
 table headers.
 
-This format is optional, install Tablib with ``pip install tablib[html]`` to
+This format is optional, install Tablib with ``pip install "tablib[html]"`` to
 make the format available.
 
 jira
@@ -132,7 +132,7 @@ ods
 Export data in OpenDocument Spreadsheet format. The ``ods`` format is currently
 export-only.
 
-This format is optional, install Tablib with ``pip install tablib[ods]`` to
+This format is optional, install Tablib with ``pip install "tablib[ods]"`` to
 make the format available.
 
 .. admonition:: Binary Warning
@@ -183,7 +183,7 @@ xls
 
 Import/export data in Legacy Excel Spreadsheet representation.
 
-This format is optional, install Tablib with ``pip install tablib[xls]`` to
+This format is optional, install Tablib with ``pip install "tablib[xls]"`` to
 make the format available.
 
 .. note::
@@ -203,9 +203,18 @@ xlsx
 
 Import/export data in Excel 07+ Spreadsheet representation.
 
-This format is optional, install Tablib with ``pip install tablib[xlsx]`` to
+This format is optional, install Tablib with ``pip install "tablib[xlsx]"`` to
 make the format available.
 
+The ``import_set()`` and ``import_book()`` methods accept keyword
+argument ``read_only``.  If its value is ``True`` (the default), the
+XLSX data source is read lazily.  Lazy reading generally reduces time
+and memory consumption, especially for large spreadsheets.  However,
+it relies on the XLSX data source declaring correct dimensions.  Some
+programs generate XLSX files with incorrect dimensions.  Such files
+may need to be loaded with this optimization turned off by passing
+``read_only=False``.
+
 .. note::
 
     When reading an ``xlsx`` file containing formulas in its cells, Tablib will
@@ -232,7 +241,7 @@ returned instead.
 
 Import assumes (for now) that headers exist.
 
-This format is optional, install Tablib with ``pip install tablib[yaml]`` to
+This format is optional, install Tablib with ``pip install "tablib[yaml]"`` to
 make the format available.
 
 .. _YAML: https://yaml.org

docs/install.rst

@@ -26,19 +26,19 @@ formats available:
 
 .. code-block:: console
 
-    $ pip install tablib[xlsx]
+    $ pip install "tablib[xlsx]"
 
 Or all possible formats:
 
 .. code-block:: console
 
-    $ pip install tablib[all]
+    $ pip install "tablib[all]"
 
 which is equivalent to:
 
 .. code-block:: console
 
-    $ pip install tablib[html, pandas, ods, xls, xlsx, yaml]
+    $ pip install "tablib[html, pandas, ods, xls, xlsx, yaml]"
 
 -------------------
 Download the Source

docs/intro.rst

@@ -57,7 +57,7 @@ THE SOFTWARE.
 Pythons Supported
 -----------------
 
-Python 3.5+ is officially supported.
+Python 3.6+ is officially supported.
 
 Now, go :ref:`install Tablib <install>`.
 

pyproject.toml

@@ -1,7 +1,2 @@
 [tool.isort]
-force_grid_wrap = 0
-include_trailing_comma = true
-known_third_party = ["MarkupPy", "odf", "openpyxl", "pkg_resources", "setuptools", "tablib", "xlrd", "xlwt", "yaml"]
-line_length = 88
-multi_line_output = 3
-use_parentheses = true
+profile = "black"

pytest.ini

@@ -1,4 +1,3 @@
 [pytest]
 norecursedirs = .git .*
 addopts = -rsxX --showlocals --tb=native --cov=tablib --cov=tests --cov-report xml --cov-report term --cov-report html
-python_paths = .

setup.py

@@ -4,7 +4,9 @@ from setuptools import find_packages, setup
 
 setup(
     name='tablib',
-    use_scm_version=True,
+    use_scm_version={
+        'write_to': 'src/tablib/_version.py',
+    },
     setup_requires=['setuptools_scm'],
     description='Format agnostic tabular data library (XLS, JSON, YAML, CSV)',
     long_description=(
@@ -31,12 +33,12 @@ setup(
         'Programming Language :: Python',
         'Programming Language :: Python :: 3 :: Only',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     extras_require={
         'all': ['markuppy', 'odfpy', 'openpyxl>=2.6.0', 'pandas', 'pyyaml', 'tabulate', 'xlrd', 'xlwt'],
         'cli': ['tabulate'],

src/tablib/__init__.py

@@ -1,5 +1,12 @@
 """ Tablib. """
-from pkg_resources import DistributionNotFound, get_distribution
+try:
+    # Generated by setuptools-scm.
+    from ._version import version as __version__
+except ImportError:
+    # Some broken installation.
+    __version__ = None
+
+
 from tablib.core import (  # noqa: F401
     Databook,
     Dataset,
@@ -10,9 +17,3 @@ from tablib.core import (  # noqa: F401
     import_book,
     import_set,
 )
-
-try:
-    __version__ = get_distribution(__name__).version
-except DistributionNotFound:
-    # package is not installed
-    __version__ = None

src/tablib/core.py

@@ -57,18 +57,10 @@ class Row:
         del self._row[i]
 
     def __getstate__(self):
-
-        slots = dict()
-
-        for slot in self.__slots__:
-            attribute = getattr(self, slot)
-            slots[slot] = attribute
-
-        return slots
+        return self._row, self.tags
 
     def __setstate__(self, state):
-        for (k, v) in list(state.items()):
-            setattr(self, k, v)
+        self._row, self.tags = state
 
     def rpush(self, value):
         self.insert(len(self._row), value)
@@ -147,9 +139,9 @@ class Dataset:
 
     .. admonition:: Format Attributes Definition
 
-     If you look at the code, the various output/import formats are not
-     defined within the :class:`Dataset` object. To add support for a new format, see
-     :ref:`Adding New Formats <newformats>`.
+    If you look at the code, the various output/import formats are not
+    defined within the :class:`Dataset` object. To add support for a new format, see
+    :ref:`Adding New Formats <newformats>`.
 
     """
 
@@ -299,7 +291,7 @@ class Dataset:
     def _get_headers(self):
         """An *optional* list of strings to be used for header rows and attribute names.
 
-        This must be set manually. The given list length must equal :class:`Dataset.width`.
+        This must be set manually. The given list length must equal :attr:`Dataset.width`.
 
         """
         return self.__headers
@@ -335,7 +327,7 @@ class Dataset:
         set, a list of Python dictionaries will be returned. If no headers have been
         set, a list of tuples (rows) will be returned instead.
 
-        A dataset object can also be imported by setting the :class:`Dataset.dict` attribute. ::
+        A dataset object can also be imported by setting the :attr:`Dataset.dict` attribute. ::
 
             data = tablib.Dataset()
             data.dict = [{'age': 90, 'first_name': 'Kenneth', 'last_name': 'Reitz'}]
@@ -414,10 +406,10 @@ class Dataset:
 
         fmt = registry.get_format(format)
         if not hasattr(fmt, 'import_set'):
-            raise UnsupportedFormat('Format {} cannot be imported.'.format(format))
+            raise UnsupportedFormat(f'Format {format} cannot be imported.')
 
         if not import_set:
-            raise UnsupportedFormat('Format {} cannot be imported.'.format(format))
+            raise UnsupportedFormat(f'Format {format} cannot be imported.')
 
         fmt.import_set(self, stream, **kwargs)
         return self
@@ -430,7 +422,7 @@ class Dataset:
         """
         fmt = registry.get_format(format)
         if not hasattr(fmt, 'export_set'):
-            raise UnsupportedFormat('Format {} cannot be exported.'.format(format))
+            raise UnsupportedFormat(f'Format {format} cannot be exported.')
 
         return fmt.export_set(self, **kwargs)
 
@@ -452,28 +444,28 @@ class Dataset:
 
     def rpush(self, row, tags=list()):
         """Adds a row to the end of the :class:`Dataset`.
-        See :class:`Dataset.insert` for additional documentation.
+        See :method:`Dataset.insert` for additional documentation.
         """
 
         self.insert(self.height, row=row, tags=tags)
 
     def lpush(self, row, tags=list()):
         """Adds a row to the top of the :class:`Dataset`.
-        See :class:`Dataset.insert` for additional documentation.
+        See :method:`Dataset.insert` for additional documentation.
         """
 
         self.insert(0, row=row, tags=tags)
 
     def append(self, row, tags=list()):
         """Adds a row to the :class:`Dataset`.
-        See :class:`Dataset.insert` for additional documentation.
+        See :method:`Dataset.insert` for additional documentation.
         """
 
         self.rpush(row, tags)
 
     def extend(self, rows, tags=list()):
         """Adds a list of rows to the :class:`Dataset` using
-        :class:`Dataset.append`
+        :method:`Dataset.append`
         """
 
         for row in rows:
@@ -515,20 +507,20 @@ class Dataset:
 
             data.append_col(col=random.randint)
 
-        If inserting a column, and :class:`Dataset.headers` is set, the
+        If inserting a column, and :attr:`Dataset.headers` is set, the
         header attribute must be set, and will be considered the header for
         that row.
 
         See :ref:`dyncols` for an in-depth example.
 
         .. versionchanged:: 0.9.0
-           If inserting a column, and :class:`Dataset.headers` is set, the
+           If inserting a column, and :attr:`Dataset.headers` is set, the
            header attribute must be set, and will be considered the header for
            that row.
 
         .. versionadded:: 0.9.0
            If inserting a row, you can add :ref:`tags <tags>` to the row you are inserting.
-           This gives you the ability to :class:`filter <Dataset.filter>` your
+           This gives you the ability to :method:`filter <Dataset.filter>` your
            :class:`Dataset` later.
 
         """
@@ -565,14 +557,14 @@ class Dataset:
 
     def rpush_col(self, col, header=None):
         """Adds a column to the end of the :class:`Dataset`.
-        See :class:`Dataset.insert` for additional documentation.
+        See :method:`Dataset.insert` for additional documentation.
         """
 
         self.insert_col(self.width, col, header=header)
 
     def lpush_col(self, col, header=None):
         """Adds a column to the top of the :class:`Dataset`.
-        See :class:`Dataset.insert` for additional documentation.
+        See :method:`Dataset.insert` for additional documentation.
         """
 
         self.insert_col(0, col, header=header)
@@ -596,7 +588,7 @@ class Dataset:
 
     def append_col(self, col, header=None):
         """Adds a column to the :class:`Dataset`.
-        See :class:`Dataset.insert_col` for additional documentation.
+        See :method:`Dataset.insert_col` for additional documentation.
         """
 
         self.rpush_col(col, header)
@@ -875,7 +867,7 @@ class Databook:
 
         fmt = registry.get_format(format)
         if not hasattr(fmt, 'import_book'):
-            raise UnsupportedFormat('Format {} cannot be loaded.'.format(format))
+            raise UnsupportedFormat(f'Format {format} cannot be loaded.')
 
         fmt.import_book(self, stream, **kwargs)
         return self
@@ -888,7 +880,7 @@ class Databook:
         """
         fmt = registry.get_format(format)
         if not hasattr(fmt, 'export_book'):
-            raise UnsupportedFormat('Format {} cannot be exported.'.format(format))
+            raise UnsupportedFormat(f'Format {format} cannot be exported.')
 
         return fmt.export_book(self, **kwargs)
 

src/tablib/formats/__init__.py

@@ -28,7 +28,7 @@ def load_format_class(dotted_path):
         module_path, class_name = dotted_path.rsplit('.', 1)
         return getattr(import_module(module_path), class_name)
     except (ValueError, AttributeError) as err:
-        raise ImportError("Unable to load format class '{}' ({})".format(dotted_path, err))
+        raise ImportError(f"Unable to load format class '{dotted_path}' ({err})")
 
 
 class FormatDescriptorBase:
@@ -122,7 +122,7 @@ class Registry:
             if key in uninstalled_format_messages:
                 raise UnsupportedFormat(
                     "The '{key}' format is not available. You may want to install the "
-                    "{package_name} (or `pip install tablib[{extras_name}]`).".format(
+                    "{package_name} (or `pip install \"tablib[{extras_name}]\"`).".format(
                         **uninstalled_format_messages[key], key=key
                     )
                 )

src/tablib/formats/_df.py

@@ -30,7 +30,7 @@ class DataFrameFormat:
         if DataFrame is None:
             raise NotImplementedError(
                 'DataFrame Format requires `pandas` to be installed.'
-                ' Try `pip install tablib[pandas]`.')
+                ' Try `pip install "tablib[pandas]"`.')
         dataframe = DataFrame(dset.dict, columns=dset.headers)
         return dataframe
 

src/tablib/formats/_html.py

@@ -55,7 +55,7 @@ class HTMLFormat:
 
         for i, dset in enumerate(databook._datasets):
             title = (dset.title if dset.title else 'Set %s' % (i))
-            wrapper.write('<{}>{}</{}>\n'.format(cls.BOOK_ENDINGS, title, cls.BOOK_ENDINGS))
+            wrapper.write(f'<{cls.BOOK_ENDINGS}>{title}</{cls.BOOK_ENDINGS}>\n')
             wrapper.write(dset.html)
             wrapper.write('\n')
 

src/tablib/formats/_jira.py

@@ -21,7 +21,7 @@ class JIRAFormat:
 
         header = cls._get_header(dataset.headers) if dataset.headers else ''
         body = cls._get_body(dataset)
-        return '{}\n{}'.format(header, body) if header else body
+        return f'{header}\n{body}' if header else body
 
     @classmethod
     def _get_body(cls, dataset):

src/tablib/formats/_rst.py

@@ -24,7 +24,7 @@ def _max_word_len(text):
     >>> _max_word_len('Python Module for Tabular Datasets')
     8
     """
-    return max(len(word) for word in text.split()) if text else 0
+    return max([len(word) for word in text.split()], default=0) if text else 0
 
 
 class ReSTFormat:

src/tablib/formats/_xls.py

@@ -3,11 +3,12 @@
 
 from io import BytesIO
 
-import tablib
 import xlrd
 import xlwt
 from xlrd.xldate import xldate_as_datetime
 
+import tablib
+
 # special styles
 wrap = xlwt.easyxf("alignment: wrap on")
 bold = xlwt.easyxf("font: bold on")

src/tablib/formats/_xlsx.py

@@ -3,13 +3,14 @@
 
 from io import BytesIO
 
-import tablib
 from openpyxl.reader.excel import ExcelReader, load_workbook
 from openpyxl.styles import Alignment, Font
 from openpyxl.utils import get_column_letter
 from openpyxl.workbook import Workbook
 from openpyxl.writer.excel import ExcelWriter
 
+import tablib
+
 
 class XLSXFormat:
     title = 'xlsx'
@@ -58,12 +59,12 @@ class XLSXFormat:
         return stream.getvalue()
 
     @classmethod
-    def import_set(cls, dset, in_stream, headers=True):
+    def import_set(cls, dset, in_stream, headers=True, read_only=True):
         """Returns databook from XLS stream."""
 
         dset.wipe()
 
-        xls_book = load_workbook(in_stream, read_only=True, data_only=True)
+        xls_book = load_workbook(in_stream, read_only=read_only, data_only=True)
         sheet = xls_book.active
 
         dset.title = sheet.title
@@ -76,12 +77,12 @@ class XLSXFormat:
                 dset.append(row_vals)
 
     @classmethod
-    def import_book(cls, dbook, in_stream, headers=True):
+    def import_book(cls, dbook, in_stream, headers=True, read_only=True):
         """Returns databook from XLS stream."""
 
         dbook.wipe()
 
-        xls_book = load_workbook(in_stream, read_only=True, data_only=True)
+        xls_book = load_workbook(in_stream, read_only=read_only, data_only=True)
 
         for sheet in xls_book.worksheets:
             data = tablib.Dataset()
@@ -114,7 +115,7 @@ class XLSXFormat:
             row_number = i + 1
             for j, col in enumerate(row):
                 col_idx = get_column_letter(j + 1)
-                cell = ws['{}{}'.format(col_idx, row_number)]
+                cell = ws[f'{col_idx}{row_number}']
 
                 # bold headers
                 if (row_number == 1) and dataset.headers:

src/tablib/formats/_yaml.py

@@ -1,9 +1,10 @@
 """ Tablib - YAML Support.
 """
 
-import tablib
 import yaml
 
+import tablib
+
 
 class YAMLFormat:
     title = 'yaml'

src/tablib/packages/dbfpy/fields.py

@@ -315,7 +315,7 @@ class DbfLogicalFieldDef(DbfFieldDef):
             return False
         if value in "YyTt":
             return True
-        raise ValueError("[{}] Invalid logical value {!r}".format(self.name, value))
+        raise ValueError(f"[{self.name}] Invalid logical value {value!r}")
 
     def encodeValue(self, value):
         """Return a character from the "TF?" set.

tests/test_tablib.py

@@ -11,8 +11,9 @@ from io import BytesIO, StringIO
 from pathlib import Path
 from uuid import uuid4
 
-import tablib
 from MarkupPy import markup
+
+import tablib
 from tablib.core import Row, detect_format
 from tablib.exceptions import UnsupportedFormat
 from tablib.formats import registry
@@ -57,7 +58,7 @@ class TablibTestCase(BaseTestCase):
         # A known format but uninstalled
         del registry._formats['ods']
         msg = (r"The 'ods' format is not available. You may want to install the "
-               "odfpy package \\(or `pip install tablib\\[ods\\]`\\).")
+               "odfpy package \\(or `pip install \"tablib\\[ods\\]\"`\\).")
         with self.assertRaisesRegex(UnsupportedFormat, msg):
             data.export('ods')
 
@@ -659,6 +660,7 @@ class RSTTests(BaseTestCase):
         data.headers = self.headers
         data.append(self.john)
         data.append(('Wendy', '', 43))
+        data.append(('Esther', ' ', 31))
         self.assertEqual(
             data.export('rst'),
             '==========  =========  ===\n'
@@ -666,6 +668,7 @@ class RSTTests(BaseTestCase):
             '==========  =========  ===\n'
             'John        Adams      90 \n'
             'Wendy                  43 \n'
+            'Esther                 31 \n'
             '==========  =========  ==='
         )
 
@@ -1037,6 +1040,13 @@ class XLSXTests(BaseTestCase):
             data = tablib.Dataset().load(fh)
         self.assertEqual(data.headers[0], 'Hello World')
 
+    def test_xlsx_bad_dimensions(self):
+        """Test loading file with bad dimension.  Must be done with
+        read_only=False."""
+        xls_source = Path(__file__).parent / 'files' / 'bad_dimensions.xlsx'
+        with xls_source.open('rb') as fh:
+            data = tablib.Dataset().load(fh, read_only=False)
+        self.assertEqual(data.height, 3)
 
 class JSONTests(BaseTestCase):
     def test_json_format_detect(self):

tox.ini

@@ -4,12 +4,14 @@ minversion = 2.4
 envlist =
     docs
     lint
-    py{35,36,37,38}
+    py{36,37,38,39}
 
 [testenv]
 deps =
     -rtests/requirements.txt
 extras = pandas
+passenv =
+    FORCE_COLOR
 commands =
     pytest {posargs:tests}
 
@@ -35,4 +37,3 @@ skip_install = true
 [flake8]
 exclude =
     .tox
-ignore=E501,E127,E128,E124