Add Pyrefly configuration for Beam Python

[jrmccluskey]

Adds a pyrefly.toml file suppressing every check that the Beam Python code base currently fails in anticipation of the adoption of Pyrefly both internally and externally.

Part of #37699

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Summary of Changes

Hello @jrmccluskey, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces the initial configuration for Pyrefly, a static analysis tool, into the Apache Beam Python SDK. The primary goal is to enable the adoption of Pyrefly by establishing a baseline configuration that temporarily ignores many existing violations, allowing for a gradual integration and future enforcement of code quality standards.

Highlights

• Pyrefly Configuration Added: A new pyrefly.toml configuration file has been added to the sdks/python directory to integrate Pyrefly, a static analysis tool, into the Beam Python codebase.
• Initial Check Suppression: The configuration initially suppresses a large number of Pyrefly checks, including bad-param-name-override, bad-override, bad-argument-type, and many others. This is done to allow for the adoption of Pyrefly without immediately failing existing code, with a clear TODO to reduce ignored checks in the future.
• Project Scope Defined: The pyrefly.toml file specifies project-includes = ["apache_beam"] and sets the python-version to 3.10.0, along with ignore-missing-imports = ["*"] and untyped-def-behavior = "skip-and-infer-return-any".

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Changelog

• sdks/python/pyrefly.toml
  • Added a new configuration file for Pyrefly.
  • Configured project scope, Python version, and untyped definition behavior.
  • Suppressed numerous Pyrefly error checks to facilitate initial integration.

Activity

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[jrmccluskey]

R: @damccorm @tvalentyn

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