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bdw/broken-re.py

Created March 25, 2014 14:11
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showing python re is subtly broken
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broken-re.py
#!/usr/bin/env python
import re
s = r'"foo \" bar" baz "quix"'
# same regex right?
p_a = r'"(\\"|[^"])*"'
p_b = r'"([^"]|\\")*"'
# no
print(re.match(p_a, s).group(0))
print(re.match(p_b, s).group(0))
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