Undefined variable T using generic on Class (PEP695)

[trentontrees]

Bug description

# pylint: disable=missing-module-docstring
class Simple[T]:
  def __init__(self, value: T):
    self.value = value

Configuration

No response

Command used

python3.12 -m pylint a.py

Pylint output

************* Module a
a.py:3:28: E0602: Undefined variable 'T' (undefined-variable)

Expected behavior

There should be no error E0602 reported.

Pylint version

pylint 3.0.3
astroid 3.0.2
Python 3.12.1 (main, Dec  7 2023, 20:45:44) [Clang 15.0.0 (clang-1500.0.40.1)]

OS / Environment

OSX - Sonoma 14.1.2 (23B92)

Additional dependencies

No response

[jacobtylerwalls]

Thanks for the report.

Test case as a diff:

diff --git a/tests/functional/u/undefined/undefined_variable_py312.py b/tests/functional/u/undefined/undefined_variable_py312.py
index 0ca2475eb..88a542653 100644
--- a/tests/functional/u/undefined/undefined_variable_py312.py
+++ b/tests/functional/u/undefined/undefined_variable_py312.py
@@ -4,4 +4,5 @@ def f[T](a: T) -> T:
     print(a)
 
 class ChildClass[T, *Ts, **P]:
-    ...
+    def __init__(self, value: T):
+        self.value = value

[winstxnhdw]

I am getting the following error for generics on functions.

Unused variable 'T' Pylint(W0612:unused-variable)

I am on pylint 3.1.0

[e-hart]

Same issue here.

Pylint Version

pylint 3.1.0
astroid 3.1.0
Python 3.12.0  [Clang 13.0.0 (clang-1300.0.29.30)]

OS / Environment

macOS Big Sur 11.7.8 (20G1351)

[lord-haffi]

Don't know if it's related to this one, but I'm getting the same error with

class A[T]:
    pass

class B[T](A[T]):
    pass

It throws E0602: Undefined variable 'T' (undefined-variable) (only) in line class B[T](A[T]):.

pylint 3.2.6
astroid 3.2.4
Python 3.12.1

[Chris3606]

Same with the following class:

class MyClass[T]:
    def func(self, x: T, y: T):
        print(x, y)

Version info:

pylint 3.2.6
astroid 3.2.4
Python 3.12.5 

[manuel-gallina]

Same issue with

pylint 3.3.1
astroid 3.3.5
Python 3.12.5