Can't type hints for collections.Counter

[grasssand]

Environment data

• Language Server version: 2020.8.0
• OS and version: Manjaro
• Python version (& distribution if applicable, e.g. Anaconda): 3.8.5

Expected behaviour

no warning

Actual behaviour

Expected class type but received "_Alias"

Logs

Code Snippet / Additional information

import collections
from typing import ChainMap, Counter, DefaultDict, OrderedDict

a: Counter = collections.Counter()

a1: Counter[str] = collections.Counter()

b: OrderedDict = collections.OrderedDict()

c: ChainMap = collections.ChainMap()

d: DefaultDict = collections.defaultdict()

[erictraut]

Thanks for the bug report. I wasn't aware there was a special alias "Counter" exported by the typing module. I've added support for it. This issue will be fixed in the next release of Pylance.

[jakebailey]

This issue has been fixed in version 2020.8.1, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#202081-13-august-2020