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Groups > comp.lang.python > #103344
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| From | Chris Angelico <rosuav@gmail.com> |
| Newsgroups | comp.lang.python |
| Subject | Re: avoid for loop calling Generator function |
| Date | Tue, 23 Feb 2016 02:46:33 +1100 |
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On Tue, Feb 23, 2016 at 2:38 AM, Arshpreet Singh <arsh840@gmail.com> wrote:
>> next(filter(print, read_pdf("book.pdf")), None)
>
> Why we are w=using filter here?
It's a beautiful hack. It'll filter according to the "print"
predicate, which always returns None, and will thus filter everything
out. One single call to next() will thus process and print the entire
PDF, and then - since it has a second parameter - return None instead
of raising StopIteration.
Or maybe it's a gross and ugly hack, with the exact same description.
ChrisA
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
avoid for loop calling Generator function Arshpreet Singh <arsh840@gmail.com> - 2016-02-22 03:15 -0800
Re: avoid for loop calling Generator function Peter Otten <__peter__@web.de> - 2016-02-22 14:34 +0100
Re: avoid for loop calling Generator function Arshpreet Singh <arsh840@gmail.com> - 2016-02-22 07:38 -0800
Re: avoid for loop calling Generator function Chris Angelico <rosuav@gmail.com> - 2016-02-23 02:46 +1100
Re: avoid for loop calling Generator function Ian Kelly <ian.g.kelly@gmail.com> - 2016-02-22 09:11 -0700
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