Pytype

Assess

Tools

Google's long-standing Python type checker for static analysis.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by framework updates, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

6InfoQ·10/18/2026framework_update
Google Switches from Pytype to Pyrefly for Python Type Checking
Google has replaced its long-running Python type checker, Pytype, with Pyrefly, an open-source tool originally created by Meta. The move is intended to improve type-checking speed and accuracy while reducing infrastructure costs.