Reduce mypy errors (Part 10)

[twisted-trac]

	@rodrigc reported
Trac ID	trac#9862
Type	enhancement
Created	2020-06-21 05:06:57Z

This is a continuation of ticket:9861

In cases where an import can fail, such as:

try:
    from twisted.internet.stdio import StandardIO, PipeAddress
except ImportError:
    # fallback if pywin32 is not installed
    StandardIO = None
    PipeAddress = None

mypy will fail with:

src/twisted/internet/endpoints.py:45:5: error: Cannot assign multiple types to name "StandardIO" without an explicit "Type[...]" annotation  [misc]
src/twisted/internet/endpoints.py:45:18: error: Incompatible types in assignment (expression has type "None", variable has type "Type[StandardIO]")  [assignment]

It will be good to clean these errors up.

Searchable metadata

trac-id__9862 9862
type__enhancement enhancement
reporter__rodrigc rodrigc
priority__normal normal
milestone__publish_types publish types
branch__ 
branch_author__ 
status__closed closed
resolution__fixed fixed
component__core core
keywords__None None
time__1592716017576122 1592716017576122
changetime__1594360403322407 1594360403322407
version__None None
owner__Craig_Rodrigues__rodrigc_____ Craig Rodrigues <rodrigc@...>

[twisted-trac]

	@rodrigc commented

#1307

[twisted-trac]

	@rodrigc commented

Approved here: #1307 (review)

[twisted-trac]

	@rodrigc set owner to @rodrigc @rodrigc set status to closed

In changeset 3ddea5f

#!CommitTicketReference repository="" revision="3ddea5f4ff78b1c775a226069348c03365271be9"
Merge pull request #1307 from twisted/9862-rodrigc-mypy

[mypy] suppress errors after ImportError

Author: rodrigc
Reviewer: adiroiban
Fixes: ticket:9862