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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"argparse.ArgumentParser.parses_args does not honor exit_on_error=False when given unrecognized arguments","articleBody":"# Bug report\n\n### Bug description:\n\nAs reported in [Discourse](https://discuss.python.org/t/about-the-exit-on-error-setting-in-argparse/56702), even though the documentation on the `exit_on_error` argument for `argparse.ArgumentParser` says:\n\n\u003e [`exit_on_error`](https://docs.python.org/3/library/argparse.html#exit-on-error) - Determines whether or not `ArgumentParser` exits with error info when an error occurs. (default: `True`)\n\nThe `parse_args` method would still exit with error info when there are unrecognized arguments:\n```python\nimport argparse\nparser = argparse.ArgumentParser(exit_on_error=False)\ntry:\n    parser.parse_args('invalid arguments'.split())\nexcept argparse.ArgumentError:\n    print('ArgumentError caught.')\n```\nwhich outputs:\n```\nusage: test.py [-h]\ntest.py: error: unrecognized arguments: invalid arguments\n```\n\n### CPython versions tested on:\n\n3.12, CPython main branch\n\n### Operating systems tested on:\n\nLinux, Windows\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-121019\n* gh-121031\n* gh-121032\n* gh-121056\n* gh-121128\n* gh-121129\n* gh-121510\n* gh-121516\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/blhsing","@type":"Person","name":"blhsing"},"datePublished":"2024-06-26T03:01:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/121018/cpython/issues/121018"}