unpractical printing of datetimes by the interpreter

[jeanrblt]

BPO	41750
Nosy	@abalkin, @serhiy-storchaka, @pganssle

^{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 2020-09-09.11:03:39.199>
created_at = <Date 2020-09-09.09:48:57.976>
labels = ['3.7', 'type-feature', 'library']
title = 'unpractical printing of datetimes by the interpreter'
updated_at = <Date 2020-09-09.11:03:39.196>
user = 'https://bugs.python.org/jeanrblt'

bugs.python.org fields:

activity = <Date 2020-09-09.11:03:39.196>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2020-09-09.11:03:39.199>
closer = 'serhiy.storchaka'
components = ['Library (Lib)']
creation = <Date 2020-09-09.09:48:57.976>
creator = 'jean.rblt'
dependencies = []
files = []
hgrepos = []
issue_num = 41750
keywords = []
message_count = 2.0
messages = ['376626', '376629']
nosy_count = 4.0
nosy_names = ['belopolsky', 'serhiy.storchaka', 'p-ganssle', 'jean.rblt']
pr_nums = []
priority = 'normal'
resolution = 'third party'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41750'
versions = ['Python 3.7']

[jeanrblt]

I think the way datetimes get printed by the interpreter is a bit unpractical. For example:

datetime.datetime(2020, 9, 9, 8, 0, tzinfo=<UTC>) 

The reason for the inpracticality is that this cannot be put right into python back:

>>datetime.datetime(2020, 9, 9, 8, 0, tzinfo=<UTC>)
File "<ipython-input-77-304f010bd0d1>", line 1
datetime.datetime(2020, 9, 9, 8, 0, tzinfo=<UTC>)
^
SyntaxError: invalid syntax

Would there be a way to make the output printed directly usable again in the interpreter? Printing datetime.datetime(2020, 9, 9, 8, 0, tzinfo=pytz.utc) for example, or something like that?

[serhiy-storchaka]

The UTC timezone implementation in the stdlib works well:

>>> import datetime
>>> datetime.datetime(2020, 9, 9, 8, 0, tzinfo=datetime.timezone.utc)
datetime.datetime(2020, 9, 9, 8, 0, tzinfo=datetime.timezone.utc)

I guess you use a third-part implementation of the UTC timezone. In such case please report your issue to this implementation.