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

从 datetime.strptime() 对 %z 指令的处理开始，并将其与 datetime.fromisoformat() 进行比较，以 issue 中的 +01 示例作为行为参考。检查同样的考虑是否适用于 %:z；当文档所述的 offset 形式能够一致地被接受，并且该示例有覆盖时，即视为完成。