Mypy and Logger

gistfile1.txt

"""
To test, run:

python3.8 -m venv /tmp/e
/tmp/e/bin/pip install attrs twisted mypy
/tmp/e/bin/mypy test.py


Mypy output:

test.py:31: note: Revealed type is "test.Foo"
test.py:34: note: Revealed type is "twisted.logger._logger.Logger"
test.py:37: note: Revealed type is "test.Foo"
test.py:38: note: Revealed type is "builtins.object"
"""

from typing import ClassVar

from attr import attrs

from twisted.logger import Logger


class Foo:
    pass


@attrs(frozen=True, auto_attribs=True, slots=True, kw_only=True)
class Bar:
    foo: ClassVar[Foo] = Foo()
    reveal_type(foo)  # Revealed type is "test.Foo"

    log: ClassVar[Logger] = Logger()
    reveal_type(log)  # Revealed type is "twisted.logger._logger.Logger"

    def blah(self) -> None:
        reveal_type(self.foo)  # Revealed type is "test.Foo"
        reveal_type(self.log)  # Revealed type is "builtins.object"  <- ?????
        return None