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55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
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# Heroku Buildpack: Python
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This is the official [Heroku buildpack](https://devcenter.heroku.com/articles/buildpacks) for Python apps, powered by [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 `$PORT`, and only the HTTP protocol is permitted for incoming connections.
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Some Python packages with obscure C dependencies (e.g. scipy) are [not compatible](https://devcenter.heroku.com/articles/python-c-deps).
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See it in Action
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----------------
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Deploying a Python application couldn't be easier:
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$ ls
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Procfile requirements.txt 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-2.7.12
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$ pip install -r requirements.txt
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Collecting requests (from -r requirements.txt (line 1))
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Downloading requests-2.10.0-py2.py3-none-any.whl (501kB)
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Installing collected packages: requests
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Successfully installed requests-2.10.0
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-----> Discovering process types
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Procfile declares types -> (none)
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A `requirements.txt` file 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-3.5.2
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Runtime options include:
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- `python-2.7.12`
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- `python-3.5.2`
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- `pypy-5.3.1` (unsupported, experimental)
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- `pypy3-2.4.0` (unsupported, experimental)
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