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astral-sh/ruff
#19791Labels
help wantedContributions especially welcomeContributions especially welcomeruntime semanticsAccurate modeling of how Python's semantics work at runtimeAccurate modeling of how Python's semantics work at runtime
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Description
Summary
Defining a module level __getattr__ is not picked up by ty: https://play.ty.dev/d17f33d6-87ec-4305-b390-9a15f9d88e7c
ty:
❯ ty check --output-format=concise main.py
WARN ty is pre-release software and not ready for production use. Expect to encounter bugs, missing features, and fatal errors.
main.py:1:23: error[unresolved-import] Module `upper` has no member `whatever`
main.py:3:1: warning[undefined-reveal] `reveal_type` used without importing it
main.py:3:13: info[revealed-type] Revealed type: `str`
main.py:4:1: warning[undefined-reveal] `reveal_type` used without importing it
main.py:4:13: info[revealed-type] Revealed type: `Unknown`
Found 5 diagnostics
mypy and pyright supports this:
❯ mypy main.py
main.py:3: note: Revealed type is "builtins.str"
main.py:4: note: Revealed type is "builtins.str"
Success: no issues found in 1 source file
❯ pyright main.py
/private/tmp/stuff.XZqSg2LO0/main.py
/private/tmp/stuff.XZqSg2LO0/main.py:3:13 - information: Type of "hi" is "str"
/private/tmp/stuff.XZqSg2LO0/main.py:4:13 - information: Type of "whatever" is "str"
0 errors, 0 warnings, 2 informations
Version
ty 0.0.1-alpha.16 (c452e53 2025-07-25)
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help wantedContributions especially welcomeContributions especially welcomeruntime semanticsAccurate modeling of how Python's semantics work at runtimeAccurate modeling of how Python's semantics work at runtime