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Python support

Python versions

fyn has Tier 1 support for the following Python versions:

  • 3.10
  • 3.11
  • 3.12
  • 3.13
  • 3.14

As with platforms, Tier 1 support can be thought of "guaranteed to work". fyn is continuously tested against these versions.

fyn has Tier 2 support for:

  • 3.6
  • 3.7
  • 3.8
  • 3.9

fyn is "expected to work" with these versions. fyn is tested against these versions, but they have reached their end-of-life and no longer receive security fixes. We do not recommend using these versions.

fyn also has Tier 2 support for pre-releases of Python 3.15.

fyn does not work with Python versions prior to 3.6.

Python implementations

fyn has Tier 1 support for the following Python implementations:

  • CPython

As with platforms, Tier 1 support can be thought of "guaranteed to work". fyn supports managed installations of these implementations, and the builds are maintained by Astral.

fyn has Tier 2 support for:

  • PyPy
  • GraalPy
  • Pyodide

fyn is "expected to work" with these implementations. fyn also supports managed installations of these Python implementations, but the builds are not maintained by Astral.

fyn has Tier 3 support for:

  • Pyston

fyn "should work" with these implementations, but stability may vary.