You don't need a regex for this, as long as the prefix and suffix are fixed lengths, the following will do:
>> "a53bc_531.txt"[6:-4] '531' >>> "a53bc_2285.txt"[6:-4] '2285' [EMAIL PROTECTED] wrote: > Hi, > I have a bunch of strings like > a53bc_531.txt > a53bc_2285.txt > ... > a53bc_359.txt > > and I want to extract the numbers 531, 2285, ...,359. > > One thing for sure is that these numbers are the ONLY part that is > changing; all the other characters are always fixed. > > I know I should use regular expressions, but I'm not familar with > python, so any quick help would help, such as which commands or idioms > to use. Thanks a lot! -- Dale Strickland-Clark Riverhall Systems - www.riverhall.co.uk -- http://mail.python.org/mailman/listinfo/python-list
