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gh-128016: Improved invalid escape sequence warning message (#128020)

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Umar Butler 2025-01-16 04:00:54 +11:00 • committed by GitHub
parent 40a4d88a14
commit 8d8b854824
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9 changed files with 63 additions and 25 deletions
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Lib/test/test_unparse.py
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@ -651,7 +651,9 @@ class CosmeticTestCase(ASTTestCase):
def test_backslash_in_format_spec(self):
import re
msg = re.escape("invalid escape sequence '\\ '")
msg = re.escape('"\\ " is an invalid escape sequence. '
'Such sequences will not work in the future. '
'Did you mean "\\\\ "? A raw string is also an option.')
with self.assertWarnsRegex(SyntaxWarning, msg):
self.check_ast_roundtrip("""f"{x:\\ }" """)
self.check_ast_roundtrip("""f"{x:\\n}" """)