Drop support for Python 3.5

[twisted-trac]

	@rodrigc reported
Trac ID	trac#9958
Type	enhancement
Created	2020-09-14 04:19:56Z

Discussed here:
https://twistedmatrix.com/pipermail/twisted-python/2020-May/065066.html

1. Python 3.5.10 will be the final release of Python 3.5, in September 2020: https://www.python.org/dev/peps/pep-0478/

2. Python 3.6.0 was released in December 2016:
   https://www.python.org/dev/peps/pep-0494/

3. PyPy 7.1.1 introduced Python 3.6 support in April 2019:
   https://morepypy.blogspot.com/2019/04/pypy-711-bug-fix-release.html
   PyPy 7.3.1 is the latest PyPy version:
   https://morepypy.blogspot.com/2020/04/pypy-731-released.html

4. Python 3.6 introduced support for variable annotations (
   https://www.python.org/dev/peps/pep-0526/ )

5. Python 3.6 introduced new string interpolation (f-string) support (
   https://www.python.org/dev/peps/pep-0498/ )

6. Python 3.6 introduced support for asynchronous generators (
   https://www.python.org/dev/peps/pep-0525/ ) and asynchronous comprehensions
   ( https://www.python.org/dev/peps/pep-0530/ )

Using PEP-0526 variable annotations would be nice in the Twisted codebase, and go well with the current efforts to run mypy as part of CI.

Searchable metadata

trac-id__9958 9958
type__enhancement enhancement
reporter__rodrigc rodrigc
priority__normal normal
milestone__None None
branch__ 
branch_author__ 
status__closed closed
resolution__fixed fixed
component__core core
keywords__review review
time__1600057196488032 1600057196488032
changetime__1614628174707542 1614628174707542
version__None None
owner__graingert graingert

[twisted-trac]

	@rodrigc commented

We would need to do one more (newer than 20.3.0) public release of Twisted, and announce that Python 3.5 is going away, before we can look at dropping Python 3.5 support.

[twisted-trac]

	@graingert set owner to @graingert

[twisted-trac]

	@graingert commented

#1528

[twisted-trac]

	tagrain set status to closed

In changeset fdd57ee

#!CommitTicketReference repository="" revision="fdd57ee93cf47559413000d9588cc607ca05d3a6"
Merge pull request #1528 from graingert/drop-py35

drop support for python3.5

Fixes: ticket:9958