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Re: How to write this as a list comprehension?

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Rustom Mody <rustompmody@gmail.com> writes:

> On Saturday, January 18, 2014 4:49:55 AM UTC+5:30, Piet van Oostrum wrote:
[...]
>
>> Python misses a 'where' or 'let'-like construction as in Haskell.
>
> +1
> Yes Ive often been bitten by the lack of a 'comprehension-let'

If it used only in a comprehension as in my example you can write instead of 'where vars = expr':
   for vars in [expr], unnecessarily construction a one element list.
If there would be a syntax like:
   for vars = expr
this could be avoided.
>
> Something like this is possible??
>
>
> [somefunc(mn,day,wd,name) for (_, mn,dy,_,_,_,wd,_,_), name) in
> [localtime(then), name for then, name in mylist]]
It works modulo some corrections in the parentheses:

[somefunc(mn,day,wd,name) for (_, mn,dy,_,_,_,wd,_,_), name in
  [(localtime(then), name) for then, name in mylist]]
but I find that hardly more elegant.
-- 
Piet van Oostrum <piet@vanoostrum.org>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]

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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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