python / python/cpython

Add ISO Basic format support to datetime.isoformat() and date.isoformat()

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#118,948 13 comments 2 reactions 0 assignees View on GitHub

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extension-modules stdlib type-feature
Dominant language
Python
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Description

Feature or enhancement

Proposal:

In additional to the popular ISO 8601 Extended format, there's also an ISO 8601 Basic format for datetimes which is useful for filenames and URL components as it avoids characters such as eg. colon and is more compact. datetime.fromisoformat already supports parsing this format.

Example code:

datetime.isoformat(basic=True)
# 20240422T204705.335-0400
date.isoformat(basic=True)
# 20240422
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-120553

Contributor guide

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Review linked PR gh-120553 and the existing datetime.isoformat() and date.isoformat() entry points first. Confirm the proposed basic=True examples for datetime and date, including compact offsets and the absence of separators, and verify that the resulting behavior is covered before considering the issue done.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
25/100

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