Nikita Sobolev <m...@sobolevn.me> added the comment:
I confirm this happens on all recent Python versions. The source of this problem is that `argparse` uses `regex` module to replace some substrings. Direct link: https://github.com/python/cpython/blame/8ce20bbdd6d2b1277a5e74154fcdcef2cb0fee49/Lib/argparse.py#L487 Quick debug showed that without this line these tests fail: ``` ====================================================================== FAIL: test_help_when_required (test.test_argparse.TestMutuallyExclusiveFirstSuppressed) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/sobolev/Desktop/cpython/Lib/test/test_argparse.py", line 2649, in test_help_when_required self.assertEqual(format_help(), textwrap.dedent(help)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError: 'usage: PROG [-h] (-y)\n\noptions:\n -h, --help show this[42 chars]lp\n' != 'usage: PROG [-h] -y\n\noptions:\n -h, --help show this h[40 chars]lp\n' - usage: PROG [-h] (-y) ? - - + usage: PROG [-h] -y options: -h, --help show this help message and exit -y y help ====================================================================== FAIL: test_usage_when_required (test.test_argparse.TestMutuallyExclusiveFirstSuppressed) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/sobolev/Desktop/cpython/Lib/test/test_argparse.py", line 2639, in test_usage_when_required self.assertEqual(format_usage(), textwrap.dedent(expected_usage)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError: 'usage: PROG [-h] (-y)\n' != 'usage: PROG [-h] -y\n' - usage: PROG [-h] (-y) ? - - + usage: PROG [-h] -y ====================================================================== FAIL: test_help_when_required (test.test_argparse.TestMutuallyExclusiveFirstSuppressedParent) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/sobolev/Desktop/cpython/Lib/test/test_argparse.py", line 2649, in test_help_when_required self.assertEqual(format_help(), textwrap.dedent(help)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError: 'usage: PROG [-h] (-y)\n\noptions:\n -h, --help show this[42 chars]lp\n' != 'usage: PROG [-h] -y\n\noptions:\n -h, --help show this h[40 chars]lp\n' - usage: PROG [-h] (-y) ? - - + usage: PROG [-h] -y options: -h, --help show this help message and exit -y y help ====================================================================== FAIL: test_usage_when_required (test.test_argparse.TestMutuallyExclusiveFirstSuppressedParent) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/sobolev/Desktop/cpython/Lib/test/test_argparse.py", line 2639, in test_usage_when_required self.assertEqual(format_usage(), textwrap.dedent(expected_usage)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError: 'usage: PROG [-h] (-y)\n' != 'usage: PROG [-h] -y\n' - usage: PROG [-h] (-y) ? - - + usage: PROG [-h] -y ---------------------------------------------------------------------- Ran 1672 tests in 23.258s FAILED (failures=4) test test_argparse failed test_argparse failed (4 failures) == Tests result: FAILURE == 1 test failed: test_argparse Total duration: 25.6 sec Tests result: FAILURE ``` ---------- nosy: +sobolevn _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45580> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
