typing.Self and typing_extensions.Self are not recognized in return type inference

[Hydrocallis]

Bug Description

Hi there,

I hope this finds you well. I've discovered that JEDI currently doesn't recognize Self type hints from both typing and typing_extensions modules when used as method return types.

Bug Description

JEDI fails to recognize Self type hints from both typing and typing_extensions modules when used as method return types.

Test Case

import jedi

test_code = '''
import typing
import typing_extensions

class UILayout:
    def method_typing_self(self) -> typing.Self:
        pass
    def method_typing_ext_self(self) -> typing_extensions.Self:
        pass
    def method_string_self(self) -> 'UILayout':
        pass

layout = UILayout()
result1 = layout.method_typing_self()
result2 = layout.method_typing_ext_self()  
result3 = layout.method_string_self()
'''

script = jedi.Script(code=test_code)
print("typing.Self:", [inf.description for inf in script.infer(line=14, column=0)])
print("typing_extensions.Self:", [inf.description for inf in script.infer(line=15, column=0)])
print("String annotation:", [inf.description for inf in script.infer(line=16, column=0)])

Expected vs Actual Results

Expected: All three should return ['instance UILayout']

Actual:

typing.Self: []
typing_extensions.Self: []
String annotation: ['instance UILayout'] #✅

Environment

JEDI version: [0.19.2]
Python version: [3.11.7]

Impact

This affects autocompletion experience in IDEs when using the standardized Self type (PEP 673). As a temporary workaround, string annotations can be used to achieve proper type inference.

[daskol]

It seems that jedi resolves Self hint with actual return value. If replace pass clause with returning class instance (i.e. return self) then jedi works as expected.

test_code = '''
import typing
import typing_extensions

class UILayout:
    def method_typing_self(self) -> typing.Self:
        return self
    def method_typing_ext_self(self) -> typing_extensions.Self:
        return self
    def method_string_self(self) -> 'UILayout':
        pass

layout = UILayout()
result1 = layout.method_typing_self()
result2 = layout.method_typing_ext_self()
result3 = layout.method_string_self()
'''

import jedi

script = jedi.Script(code=test_code)
print("typing.Self:", [inf.description for inf in script.infer(line=14, column=0)])
print("typing_extensions.Self:", [inf.description for inf in script.infer(line=15, column=0)])
print("String annotation:",
      [inf.description for inf in script.infer(line=16, column=0)])

$ python issue2068.py
typing.Self: ['instance UILayout']
typing_extensions.Self: ['instance UILayout']
String annotation: ['instance UILayout']

$ python -V                   
Python 3.13.7
$ pip show jedi | grep Version
Version: 0.19.2

[Hydrocallis]

Thanks!
I'll propose it to the community!