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From: Peter Pearson <pkpearson@nowhere.invalid>
Newsgroups: comp.lang.python
Subject: Re: filter a list of strings
Date: 5 Dec 2015 19:42:04 GMT
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On Thu, 3 Dec 2015 10:27:19 +0100, <c.buhtz@posteo.jp> wrote:
[snip]
> I often saw constructions like this
>   x for x in y if ...
> But I don't understand that combination of the Python keywords (for,
> in, if) I allready know. It is to complex to imagine what there really
> happen.

Don't give up!  List comprehensions are one of the coolest things
in Python.  Maybe this simple example will make it click for you:

>>> [x**2 for x in [1,2,3,4] if x != 2]
[1, 9, 16]

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