python
datetime.strptime's %z should support +HH
Feature or enhancement
Proposal:
The %z directive supports the UTC offset in the form ±HHMM[SS[.ffffff]]. Other parsing functions like fromisoformat on the other hand support the full format ±HH[MM[SS[.ffffff]]]. So there is no strptime format that supports the fromisoformat.
from datetime import datetime
datetime.fromisoformat("2023-05-25T15:35:05.666+01") # ok
datetime.strptime("2023-05-25T15:35:05.666+01", "%Y-%m-%dT%H:%M:%S.%f%z") # nok
The same may apply to %:z (https://github.com/python/cpython/issues/121237)
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Linked PRs
- gh-130390
I'm ready to start working on solving this issue if no one else is against it.
Also the second argument (format) in the third line has problems with the placement of :. I think you meant:
datetime.strptime("2023-05-25T15:35:05.666+01", "%Y-%m-%dT%H:%M:%S.%f%z") # nok
And another example that %z will work in the form of HHMM. As I understand it we want to achieve the same result, but without using the HHMM format:
datetime.strptime("2023-05-25T15:35:05.666+0100", "%Y-%m-%dT%H:%M:%S.%f%z") # ok
Thank you for the corrections and your work on this issue. I updated the issue with the correct string.
Implementing this for strptime is one thing, but what about strftime? This change does not conform to the 1989 C standard.
