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bpo-28146: Fix a confusing error message in str.format() (GH-24213) 

Automerge-Triggered-By: GH:pitrou
(cherry picked from commit 4aeee0b47b)

Co-authored-by: Irit Katriel <iritkatriel@yahoo.com>
This commit is contained in:
Miss Islington (bot) 2021-05-13 14:24:49 -07:00 committed by GitHub
parent c4c3beb5ad
commit 2d780237d9
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 14 additions and 4 deletions
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7
Lib/test/test_unicode.py
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@ -1231,8 +1231,11 @@ def __repr__(self):
0, 1, 2, 3, 4, 5, 6, 7) 0, 1, 2, 3, 4, 5, 6, 7)
# string format spec errors # string format spec errors
self.assertRaises(ValueError, "{0:-s}".format, '') sign_msg = "Sign not allowed in string format specifier"
self.assertRaises(ValueError, format, "", "-") self.assertRaisesRegex(ValueError, sign_msg, "{0:-s}".format, '')
self.assertRaisesRegex(ValueError, sign_msg, format, "", "-")
space_msg = "Space not allowed in string format specifier"
self.assertRaisesRegex(ValueError, space_msg, "{: }".format, '')
self.assertRaises(ValueError, "{0:=s}".format, '') self.assertRaises(ValueError, "{0:=s}".format, '')
# Alternate formatting is not supported # Alternate formatting is not supported

1
Misc/NEWS.d/next/Core and Builtins/2021-01-13-19-34-41.bpo-28146.AZBBkH.rst Normal file
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@ -0,0 +1 @@
Fix a confusing error message in :func:`str.format`.

10
Python/formatter_unicode.c
View File

@ -773,8 +773,14 @@ format_string_internal(PyObject *value, const InternalFormatSpec *format,
/* sign is not allowed on strings */ /* sign is not allowed on strings */
if (format->sign != '\0') { if (format->sign != '\0') {
PyErr_SetString(PyExc_ValueError, if (format->sign == ' ') {
"Sign not allowed in string format specifier"); PyErr_SetString(PyExc_ValueError,
"Space not allowed in string format specifier");
}
else {
PyErr_SetString(PyExc_ValueError,
"Sign not allowed in string format specifier");
}
goto done; goto done;
} }