def module():
from typing import Generic, TypeVar
from pydantic import BaseModel
from pydantic.generics import GenericModel, _generic_types_cache
t = TypeVar('t')
class MyGeneric(GenericModel, Generic[t]):
value: t
class Model(BaseModel):
...
concrete = MyGeneric[Model]
_generic_types_cache.clear()
second_concrete = MyGeneric[Model]
class Model(BaseModel
): # same name, but type different, so it's not in cache
...
third_concrete = MyGeneric[Model]
assert concrete is not second_concrete
assert concrete is not third_concrete
assert second_concrete is not third_concrete
assert globals()['MyGeneric[Model]'] is concrete
assert globals()['MyGeneric[Model]_'] is second_concrete
assert globals()['MyGeneric[Model]__'] is third_concrete
def module():
from typing import Generic, TypeVar
import pytest
from pydantic.generics import GenericModel, _generic_types_cache
t = TypeVar('t')
class MyGeneric(GenericModel, Generic[t]):
value: t
concrete = MyGeneric[t]
_generic_types_cache.clear()
with pytest.raises(
TypeError,
match=
r"'MyGeneric\[t\]' already defined above, please consider reusing it"
) as exc_info:
MyGeneric[t]
cause = exc_info.value.__cause__
assert isinstance(cause, NameError), cause
expected_message = f"Name conflict: 'MyGeneric[t]' in {__name__!r} is already used by {concrete!r}"
assert cause.args[
0] == expected_message, f'{cause.args[0]} != {expected_message}'