[Python-Dev] for loop with if filter (original) (raw)

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 comprehensions 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 http://benjiyork.com

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