The Python's regex different from Perl's ,I want know what's the different?
Easy:bash$ diff <(lynx -dump http://perldoc.perl.org/perlre.html) <(lynx -dump http://docs.python.org/library/re.html)
Had you tried the great Google in the sky, you might have found such pages as:
http://mail.python.org/pipermail/python-list/2005-April/319030.html or even a popular book on the subject: http://oreilly.com/catalog/9780596002893/ -tkc -- http://mail.python.org/mailman/listinfo/python-list