[Python-Dev] for loop with if filter

Benji York benji at benjiyork.com
Fri Nov 16 15:26:06 CET 2007

Gustavo Carneiro wrote:
 > I am finding myself often doing for loops over a subset of a list, like:
 >         for r in results:
 >             if r.numNodes != numNodes:
 >                 continue
 >             # do something with r
 > It would be nice if the plain for loop was as flexible as list 
 > and allowed an optional if clause, like this:
 >         for r in results if r.numNodes == numNodes:
 >             # do something with r

You can do the same today, sans sugar:

     for r in (s for s in results if s.numNodes == numNodes):
         # do something with r
Benji York

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