IDE does no longer warn for non-subscripable

[luckydonald]

Describe the bug
The IDE doesn't warn when there's a index/keyword lookup operation.

Take this example:

from pydantic import BaseModel

class SomeModel(BaseModel):
   foo: str
   
instance = SomeModel(foo='fooo')
y1 = instance['foo']

Notice how the IDE doesn't warn for the use of ['foo'].
However, the result is

TypeError: 'SomeModel' object is not subscriptable

To Reproduce
Steps to reproduce the behavior:

1. Write the code above
2. See that the IDE doesn't warn.
3. Write the code in Expected Behavior
4. they should perform similar.

Expected behavior
Compare that to how the IDE handles a normal class:

class NotAPydanticModel(object):
   foo: str
   
instance = NotAPydanticModel()
y2 = instance['foo']

Notice how the IDE complains about the use of ['foo'] here.

Screenshots

It marks only the second ['foo'] as error.

Environments (please complete the following information):

• IDE: PyCharm Professional 2024.1.3
• OS: Linux fedora 6.8.11-300.fc40.x86_64 [Feature] minimum support #1 SMP PREEMPT_DYNAMIC Mon May 27 14:53:33 UTC 2024 x86_64 GNU/Linux
• Pydantic Version 2.7.4
• Plugin version 0.4.13

Additional context
Mypy has this correctly, but so should the IDE.

[luckydonald]

My guess is, because of def __class_getitem__(…) (which seems to be for generics and stuff), the IDE thinks we'll wanna use the class' getitem, i.e. instance.__class__[…].
So the IDE should ignore pydantic's BaseModel.__class_getitem__ when checking for that.

[UltimateLobster]

Encountered it as well when covnverting a TypedDict to a BaseModel. I missed to parts which still treated it as a typed dict because I didn't get any warning :(

I created my own class and implemented __class_getitem__. Pycharm understood it correctly and gave me the warnings.. It seems like a genuine bug in the plugin.