Serhiy Storchaka added the comment: I suggest to use my regular expression for haxadedecimals. Your regular expression starves from catastrophic backtracking. Compare two examples:
re.match(r'0[xX]_?[\da-fA-F]+(?:_[\da-fA-F]+)*[lL]?'+r'\b', '0x'+'0'*100+'z') re.match(r'0[xX](?:_?[\da-fA-F]+)+[lL]?'+r'\b', '0x'+'0'*100+'z') ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29869> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
