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65 lines
2.1 KiB
Markdown
65 lines
2.1 KiB
Markdown
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# Heroku Buildpack: Python
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[](https://travis-ci.org/heroku/heroku-buildpack-python)
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This is the official [Heroku buildpack](https://devcenter.heroku.com/articles/buildpacks) for Python apps, powered by [Pipenv](http://docs.pipenv.org/), [pip](https://pip.pypa.io/) and other excellent software.
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Recommended web frameworks include **Django** and **Flask**. The recommended webserver is **Gunicorn**. There are no restrictions around what software can be used (as long as it's pip-installable). Web processes must bind to `$PORT`, and only the HTTP protocol is permitted for incoming connections.
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Some Python packages with obscure C dependencies are [not compatible](https://devcenter.heroku.com/articles/python-c-deps).
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See it in Action
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----------------
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Deploying a Python application couldn't be easier:
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$ ls
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Pipfile Procfile web.py
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$ heroku create --buildpack heroku/python
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$ git push heroku master
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…
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-----> Python app detected
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-----> Installing python-3.6.4
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-----> Installing pip
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-----> Installing requirements with latest pipenv…
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...
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Installing dependencies from Pipfile…
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-----> Discovering process types
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Procfile declares types -> (none)
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A `Pipfile` or `requirements.txt` must be present at the root of your application's repository.
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You can also specify the latest production release of this buildpack for upcoming builds of an existing application:
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$ heroku buildpacks:set heroku/python
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Specify a Python Runtime
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------------------------
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Specific versions of the Python runtime can be specified with a `runtime.txt` file:
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$ cat runtime.txt
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python-2.7.14
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Or, with a `Pipfile.lock` (generated from the following `Pipfile`):
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[requires]
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python_version = "2.7"
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Or, more specifically:
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[requires]
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python_full_version = "2.7.14"
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Runtime options include:
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- `python-3.6.4`
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- `python-2.7.14`
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- `pypy-5.7.1` (unsupported, experimental)
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- `pypy3-5.5.1` (unsupported, experimental)
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