collections.deque is not recognised as MutableSequence

[timrichardson]

In Python 3.5.1, deque should be a MutableSequence (https://bugs.python.org/issue23704)
By mypy does not recognise it as such

import typing
from collections import deque


dq = deque() # type: typing.MutableSequence

error: Incompatible types in assignment (expression has type deque[None], variable has type MutableSequence[Any])

[JukkaL]

Thanks for reporting this! This is a library stub problem and stubs now live in https://github.com/python/typeshed. Would you mind creating an issue at typeshed?

[timrichardson]

done
python/typeshed#43