PyPy Python implementation is no longer supported
Change effective on 26 September 2022
PyPy is an alternative implementation of Python.
The Heroku Python buildpack’s experimental support for PyPy runtimes has now been removed due to extremely low usage. As such, builds of apps using PyPy will now fail with a not-supported message.
Affected apps should either:
- Switch to the more commonly used CPython runtimes by updating
runtime.txtto specify a supported Python version (in the form
python-X.Y.Z) instead of
- Switch to the
containerstack and use the upstream official PyPy Docker image instead.