add strptime(s, '%s')

[4kir4]

BPO	22246
Nosy	@abalkin, @4kir4, @pganssle
Files	draft-strptime-%s.diff

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/abalkin'
closed_at = None
created_at = <Date 2014-08-21.23:48:56.540>
labels = ['type-feature', 'library']
title = "add strptime(s, '%s')"
updated_at = <Date 2020-03-18.18:00:00.204>
user = 'https://github.com/4kir4'

bugs.python.org fields:

activity = <Date 2020-03-18.18:00:00.204>
actor = 'brett.cannon'
assignee = 'belopolsky'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2014-08-21.23:48:56.540>
creator = 'akira'
dependencies = []
files = ['36431']
hgrepos = []
issue_num = 22246
keywords = ['patch']
message_count = 3.0
messages = ['225624', '238840', '270534']
nosy_count = 3.0
nosy_names = ['belopolsky', 'akira', 'p-ganssle']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue22246'
versions = ['Python 3.6']

[4kir4]

bpo-12750 makes strftime('%s') portable. For symmetry,
datetime.strptime(s, '%s') could be enabled to return local time as an
aware (to avoid loosing info) datetime object for a given integer
(seconds since the Epoch) timestamp string.

I've uploaded a prototype patch with a draft implementation, docs, and
tests.

[BreamoreBoy]

It's a comprehensive patch so can we have a formal review please.

[abalkin]

With PEP-495, conversion from timestamp to naive datetime will no longer loose information. In light of this, I would like to reconsider what strftime('%s') should return in the absence of %z.

[StanFromIreland]

This is a duplicate: #56959