python: Regex matching file extension

hi i am trying to get the extension of the file called in a url (eg /wp-includes/js/jquery/jquery.js?ver=1.3.2 HTTP/1.1) and get the query parameters passed to the file too.

What would be the best way to the 开发者_如何转开发extension?

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urlparse.urlparse() and os.path.splitext().