Declare support for Python 3.10

[hugovk]

Python 3.10 was released on 2021-10-04:

• https://discuss.python.org/t/python-3-10-0-is-now-available/10955

[jmcnamara]

Thanks. Merged.

I'll add it to the test matrix as well.

[hugovk]

It just so happens that 3.x currently points to 3.10 so it's already in the test matrix :)

I'd recommend testing against all supported versions, the tests run quickly enough. Also I'd suggest only supporting Python versions supported by the core team, currently 3.6+.

cycle	latest	release	eol
3.10	3.10.0	2021-10-04	2026-10-04
3.9	3.9.8	2020-10-05	2025-10-05
3.8	3.8.12	2019-10-14	2024-10-14
3.7	3.7.12	2018-06-27	2023-06-27
3.6	3.6.15	2016-12-23	2021-12-23
3.5	3.5.10	2015-09-30	2020-09-13
3.4	3.4.10	2014-03-16	2019-03-18

[jmcnamara]

It just so happens that 3.x currently points to 3.10 so it's already in the test matrix :)

I was referring to my local test matrix (be8d1cb) but I should really (as you say) turn on the other versions in the GitHub actions testing. I had them on before but 99% of the time they are unnecessary for most people so I turned them off. I'll turn them on again.

Also I'd suggest only supporting Python versions supported by the core team, currently 3.6+.

Yeah. I'd like to (and probably will) drop 3.4 at least.

Anyway thanks for the prompt.

[hugovk]

Please see PR #842 :)

[MartinPacker]

I think I would recommend 3.8+ - though this is obviously a moving window.

(3.8 has the Walrus Operator which I've found - in my md2pptx project - to yield benefits.)

"Recommend" is not the same as "require", of course.

[hugovk]

Python 3.6 and 3.7 account for 61% of downloads: #842