From experience, the python re module does weird things sometimes. There is a be... | Hacker News

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keeperofdakeys on June 22, 2014 | parent | context | favorite | on: In search of the perfect URL validation regex

From experience, the python re module does weird things sometimes. There is a better third-party regex module, https://pypi.python.org/pypi/regex.

bgwhn on June 22, 2014 [–]

Does it use NFA?

http://swtch.com/~rsc/regexp/regexp1.html

Because the issue with the URL regex mentioned is with backtracking.

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