"ValueError: Invalid isoformat string" from a valid string

[oittaa]

BPO	46029
Nosy	@ericvsmith, @oittaa
Superseder	bpo-35829: datetime: parse "Z" timezone suffix in fromisoformat()

^{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 = None
closed_at = <Date 2021-12-10.15:11:47.725>
created_at = <Date 2021-12-10.03:01:19.019>
labels = ['type-bug', '3.10']
title = '"ValueError: Invalid isoformat string" from a valid string'
updated_at = <Date 2021-12-10.15:11:47.722>
user = 'https://github.com/oittaa'

bugs.python.org fields:

activity = <Date 2021-12-10.15:11:47.722>
actor = 'eric.smith'
assignee = 'none'
closed = True
closed_date = <Date 2021-12-10.15:11:47.725>
closer = 'eric.smith'
components = []
creation = <Date 2021-12-10.03:01:19.019>
creator = 'oittaa'
dependencies = []
files = []
hgrepos = []
issue_num = 46029
keywords = []
message_count = 2.0
messages = ['408173', '408212']
nosy_count = 2.0
nosy_names = ['eric.smith', 'oittaa']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '35829'
type = 'behavior'
url = 'https://bugs.python.org/issue46029'
versions = ['Python 3.10']

[oittaa]

Test case:

>>> import datetime
>>> datetime.datetime.fromisoformat('2021-12-10T01:00:00Z')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: Invalid isoformat string: '2021-12-10T01:00:00Z'

Basically every other programming language I tested correctly accepted this ISO/RFC3339 string as a date.

[ericvsmith]

fromisoformat() is only designed to parse the output of isformat().

See bpo-35829 for further discussion. I'm going to close this issue as a duplicate.