8000 bpo-44676: Serialize the union type using only public API by serhiy-storchaka · Pull Request #27323 · python/cpython · GitHub
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bpo-44676: Serialize the union type using only public API #27323

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serhiy-storchaka merged 4 commits into from
Jul 24, 2021
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bpo-44676: Serialize the union type using only public API #27323

serhiy-storchaka merged 4 commits into from
Jul 24, 2021

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@serhiy-storchaka serhiy-storchaka commented Jul 24, 2021 •
edited by bedevere-bot
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@serhiy-storchaka serhiy-storchaka added type-feature A feature request or enhancement skip news labels Jul 24, 2021
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uriyyo commented Jul 24, 2021 •
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Should we also remove Union._from_args classmethod introduced by #27244? Basically, it was introduced for pickling support so looks like we don't need it anymore.

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Should we also remove Union._from_args classmethod introduced by #27244? Basically, it was introduced for pickling support so looks like we don't need it anymore.

Agreed. Lets remove it.

Note: we can only remove it if we're backporting this to 3.10. Pickle docs says its confirmed to be backwards compatible. So if we don't backport this, we have to leave the private method in forever :(. Either that, or we can remove serialization from 3.10, I created a PR at GH-27335 for that.

If Serhiy agrees to backporting this, we should probably consult the RM Pablo again.

Lib/copyreg.py

pickle(complex, pickle_complex, complex)

def pickle_union(obj):
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Off topic: I didn't know such a module existed 😮 . This is really cool! Thanks for teaching me something new today Serhiy.

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Fidget-Spinner commented Jul 24, 2021 •
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Copied over from GH-27244, by Yurii:

@Fidget-Spinner I just realise that Union._from_args will be removed by #27323. I think we should backport #27323 to not introduce Union._from_args at python 3.10.

I agree with Yurii's reasoning here. +1 to backport this to 3.10 to remove _from_args from the API.

Alternatively, we can remove the ability to pickle Union in 3.10 (see GH-27333).

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serhiy-storchaka commented Jul 24, 2021

Oh, I did not know this feature was backported to 3.10. It makes sense to haste and backport this PR too.

@serhiy-storchaka serhiy-storchaka merged commit 435a033 into python:main Jul 24, 2021
@serhiy-storchaka serhiy-storchaka deleted the union-pickle branch July 24, 2021 18:26
@serhiy-storchaka serhiy-storchaka added the needs backport to 3.10 only security fixes label Jul 24, 2021
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miss-islington commented Jul 24, 2021

Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10.
🐍🍒⛏🤖

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bedevere-bot commented Jul 24, 2021

GH-27340 is a backport of this pull request to the 3.10 branch.

@bedevere-bot bedevere-bot removed the needs backport to 3.10 only security fixes label Jul 24, 2021
miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Jul 24, 2021
@serhiy-storchaka @miss-islington
bpo-44676: Serialize the union type using only public API (pythonGH-2…
fe49cf5 
…7323)

Remove also the _from_args() constructor.
(cherry picked from commit 435a033)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
serhiy-storchaka added a commit that referenced this pull request Jul 24, 2021
@miss-islington @serhiy-storchaka
bpo-44676: Serialize the union type using only public API (GH-27323) (G…
0aea99e 
…H-27340)

Remove also the _from_args() constructor.
(cherry picked from commit 435a033)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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