Regex to match the first file in a rar archive file set in Python

Posted by mridang on Stack Overflow See other posts from Stack Overflow or by mridang
Published on 2010-03-29T12:41:18Z Indexed on 2010/03/29 12:43 UTC
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I need to uncompress all the files in a directory and for this I need to find the first file in the set. I'm currently doing this using a bunch of if statements and loops. Can i do this this using regex?

Here's a list of files that i need to match:

yes.rar
yes.part1.rar
yes.part01.rar
yes.part001.rar
yes.r01
yes.r001

These should NOT be matched:

no.part2.rar
no.part02.rar
no.part002.rar
no.part011.rar
no.r002
no.r02

I found a similar regex on this thread but it seems that Python doesn't support varible length lookarounds. A single line regex would be complicated but I'll document it well and it's not a problem. It's just one of those problems you beat your heap up, over.

Thanks in advance guys.

:)

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