Operator "==" not supported for types Type[]

[ytimenkov]

Environment data

• Language Server version: Pylance language server 2020.12.0 (pyright ea581b3f)
• OS and version: Ubuntu 20.20
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.8.5 venv

Expected behaviour

I'm writing default exception handler and there I need to compare exception types:

import json
import sys
from types import TracebackType
from typing import Type, cast


def exception_handler(
    etype: Type[BaseException], exc: BaseException, tb: TracebackType
):
    if etype == json.decoder.JSONDecodeError:
        exc = cast(json.decoder.JSONDecodeError, exc)
        print(f"Invalid json:\n{exc.doc!r}")


sys.excepthook = exception_handler

json.loads("invalid")

Actual behaviour

Pylance complains:

Operator "==" not supported for types "Type[BaseException]" and "Type[JSONDecodeError]"
  Operator "==" not supported for types "Type[BaseException]" and "Type[JSONDecodeError]"Pylance (reportGeneralTypeIssues)

However running prints:

Invalid json:
'invalid'

[erictraut]

Thanks for the bug report. This will be fixed in the next release.

[jakebailey]

This issue has been fixed in version 2020.12.1, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#2020121-9-december-2020