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From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: The Cost of Dynamism (was Re: Pyhon 2.x or 3.x, which is faster?)
Date: Wed, 23 Mar 2016 00:00:25 +1100
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On Tue, Mar 22, 2016 at 11:52 PM, Jussi Piitulainen
<jussi.piitulainen@helsinki.fi> wrote:
> Now you can ask for the next item that satisfies a condition using a
> generator expression:
>
> next(symbol for symbol in stream if not symbol.isspace())
> ---> '/'
>
> next(symbol for symbol in stream if not symbol.isspace())
> ---> '*'

Or use filter(), which is sometimes clearer:

# You probably want a more sophisticated function here
def nonspace(ch): return not ch.isspace()

next(filter(nonspace, stream))

ChrisA