https://github.com/python/cpython/commit/41edd371606109e93ce9d73c053109085f740d1b commit: 41edd371606109e93ce9d73c053109085f740d1b branch: 3.11 author: Mark Dickinson <[email protected]> committer: terryjreedy <[email protected]> date: 2024-01-13T13:22:31-05:00 summary:
[3.11] gh-114014: Update `fractions.Fraction()`'s rational parsing regex (GH-114015) (#114025) Fix a bug in the regex used for parsing a string input to the `fractions.Fraction` constructor. That bug led to an inconsistent exception message being given for some inputs. --------- Co-authored-by: Crowthebird <[email protected]> Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com> Co-authored-by: Adam Turner <[email protected]> files: A Misc/NEWS.d/next/Library/2024-01-13-11-34-29.gh-issue-114014.WRHifN.rst M Lib/fractions.py M Lib/test/test_fractions.py diff --git a/Lib/fractions.py b/Lib/fractions.py index f9ac882ec002fa..a7a7fea5caa4e4 100644 --- a/Lib/fractions.py +++ b/Lib/fractions.py @@ -21,17 +21,17 @@ _PyHASH_INF = sys.hash_info.inf _RATIONAL_FORMAT = re.compile(r""" - \A\s* # optional whitespace at the start, - (?P<sign>[-+]?) # an optional sign, then - (?=\d|\.\d) # lookahead for digit or .digit - (?P<num>\d*|\d+(_\d+)*) # numerator (possibly empty) - (?: # followed by - (?:/(?P<denom>\d+(_\d+)*))? # an optional denominator - | # or - (?:\.(?P<decimal>d*|\d+(_\d+)*))? # an optional fractional part - (?:E(?P<exp>[-+]?\d+(_\d+)*))? # and optional exponent + \A\s* # optional whitespace at the start, + (?P<sign>[-+]?) # an optional sign, then + (?=\d|\.\d) # lookahead for digit or .digit + (?P<num>\d*|\d+(_\d+)*) # numerator (possibly empty) + (?: # followed by + (?:/(?P<denom>\d+(_\d+)*))? # an optional denominator + | # or + (?:\.(?P<decimal>\d*|\d+(_\d+)*))? # an optional fractional part + (?:E(?P<exp>[-+]?\d+(_\d+)*))? # and optional exponent ) - \s*\Z # and optional whitespace to finish + \s*\Z # and optional whitespace to finish """, re.VERBOSE | re.IGNORECASE) diff --git a/Lib/test/test_fractions.py b/Lib/test/test_fractions.py index fc46e8674fc46e..22dbd1e06b5377 100644 --- a/Lib/test/test_fractions.py +++ b/Lib/test/test_fractions.py @@ -259,6 +259,30 @@ def testFromString(self): self.assertRaisesMessage( ValueError, "Invalid literal for Fraction: '1.1e+1__1'", F, "1.1e+1__1") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '123.dd'", + F, "123.dd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '123.5_dd'", + F, "123.5_dd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: 'dd.5'", + F, "dd.5") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '7_dd'", + F, "7_dd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '1/dd'", + F, "1/dd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '1/123_dd'", + F, "1/123_dd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '789edd'", + F, "789edd") + self.assertRaisesMessage( + ValueError, "Invalid literal for Fraction: '789e2_dd'", + F, "789e2_dd") # Test catastrophic backtracking. val = "9"*50 + "_" self.assertRaisesMessage( diff --git a/Misc/NEWS.d/next/Library/2024-01-13-11-34-29.gh-issue-114014.WRHifN.rst b/Misc/NEWS.d/next/Library/2024-01-13-11-34-29.gh-issue-114014.WRHifN.rst new file mode 100644 index 00000000000000..a6630d73435467 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2024-01-13-11-34-29.gh-issue-114014.WRHifN.rst @@ -0,0 +1 @@ +Fixed a bug in :class:`fractions.Fraction` where an invalid string using ``d`` in the decimals part creates a different error compared to other invalid letters/characters. Patch by Jeremiah Gabriel Pascual. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-checkins.python.org/ Member address: [email protected]
