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Re: How to write this as a list comprehension?

From Jussi Piitulainen <jpiitula@ling.helsinki.fi>
Newsgroups comp.lang.python
Subject Re: How to write this as a list comprehension?
Date 2014-01-18 18:00 +0200
Organization A noiseless patient Spider
Message-ID <qotha91nutu.fsf@ruuvi.it.helsinki.fi> (permalink)
References <m2sism42n8.fsf@cochabamba.vanoostrum.org> <mailman.5671.1390034188.18130.python-list@python.org> <ff9f6177-b41c-446c-9f57-dbc9b6488b6f@googlegroups.com>

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Rustom Mody writes:

> On Saturday, January 18, 2014 2:06:29 PM UTC+5:30, Peter Otten wrote:
>
> > What would a list-comp with `let` or `where` look like? Would it
> > win the beauty contest against the loop?
> 
> For me this is neat
> 
> [somefunc(mn,day,wd,name) for (then, name) in mylist let (_,mn,dy,_,_,_,wd,_,_) = localtime(then)]
>    
> Others may not find it so!
> 
> See it across > 1 line (as I guess it will come after being posted!)
> and its not so neat.

I would write that on three lines anyway, properly indented:

  [ somefunc(mn,day,wd,name)
    for (then, name) in mylist
    let (_,mn,dy,_,_,_,wd,_,_) = localtime(then) ]

It could be made to use existing keywords:

  [ somefunc(mn,day,wd,name)
    for (then, name) in mylist
    with localtime(then) as (_,mn,dy,_,_,_,wd,_,_) ]

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Thread

How to write this as a list comprehension? Piet van Oostrum <piet@vanoostrum.org> - 2014-01-18 00:19 +0100
  Re: How to write this as a list comprehension? Dan Stromberg <drsalists@gmail.com> - 2014-01-17 15:49 -0800
  Re: How to write this as a list comprehension? Rustom Mody <rustompmody@gmail.com> - 2014-01-17 19:25 -0800
    Re: How to write this as a list comprehension? Piet van Oostrum <piet@vanoostrum.org> - 2014-01-18 11:00 +0100
  Re: How to write this as a list comprehension? Peter Otten <__peter__@web.de> - 2014-01-18 09:36 +0100
    Re: How to write this as a list comprehension? Rustom Mody <rustompmody@gmail.com> - 2014-01-18 07:20 -0800
      Re: How to write this as a list comprehension? Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-01-18 18:00 +0200
        Re: How to write this as a list comprehension? "Rhodri James" <rhodri@wildebst.org.uk> - 2014-01-19 23:41 +0000
          Re: How to write this as a list comprehension? Piet van Oostrum <piet@vanoostrum.org> - 2014-01-20 12:02 +0100
            Re: How to write this as a list comprehension? Rustom Mody <rustompmody@gmail.com> - 2014-01-20 03:47 -0800
  Re: How to write this as a list comprehension? matej@ceplovi.cz (Matěj Cepl) - 2014-01-18 11:57 +0100
  Re: How to write this as a list comprehension? Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2014-01-18 12:53 +0100
    Re: How to write this as a list comprehension? Piet van Oostrum <piet@vanoostrum.org> - 2014-01-18 18:40 +0100
  Re: How to write this as a list comprehension? John Allsup <pydev@allsup.co> - 2014-01-19 01:24 +0000
    Re: How to write this as a list comprehension? Piet van Oostrum <piet@vanoostrum.org> - 2014-01-19 23:06 +0100

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