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-rw-r--r--Lib/fractions.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/fractions.py b/Lib/fractions.py
index 738a0d4c30..43b72ae414 100644
--- a/Lib/fractions.py
+++ b/Lib/fractions.py
@@ -26,7 +26,7 @@ _RATIONAL_FORMAT = re.compile(r"""
(?=\d|\.\d) # lookahead for digit or .digit
(?P<num>\d*|\d+(_\d+)*) # numerator (possibly empty)
(?: # followed by
- (?:/(?P<denom>\d+(_\d+)*))? # an optional denominator
+ (?:\s*/\s*(?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