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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Subsequent datetime.now() calls return the same datetime","articleBody":"# Bug report\n\n### Bug description:\n\nSubsequent `datetime.now()` may return the same moment in time.\n\n```python\nfrom datetime import datetime, UTC\n\nnow1 = datetime.now(UTC)\nfor i in range(10_000):\n    a = i\nnow2 = datetime.now(UTC)\n\nassert now1 \u003c now2\n```\n```\n    assert now1 \u003c now2\n           ^^^^^^^^^^^\nAssertionError\n```\n\nThis does seem to work as expected:\n```python\nfrom time import sleep\nfrom datetime import datetime, UTC\n\nnow1 = datetime.now(UTC)\nsleep(0.000_000_001)\nnow2 = datetime.now(UTC)\n\nassert now1 \u003c now2\n```\n\nI'm not sure if this is a bug, but at least it's a documentation issue.\nThere's nothing in the [docs](https://docs.python.org/3/library/datetime.html#datetime.datetime.now) explicitly indicating this behavior.\n\n### CPython versions tested on:\n\n3.12\n\n### Operating systems tested on:\n\nWindows\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-124834\n* gh-125145\n* gh-125146\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/spacemanspiff2007","@type":"Person","name":"spacemanspiff2007"},"datePublished":"2024-10-01T08:27:48.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/124832/cpython/issues/124832"}