How to write this as a list comprehension?
Piet van Oostrum
piet at vanoostrum.org
Sat Jan 18 05:00:36 EST 2014
Rustom Mody <rustompmody at 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 at vanoostrum.org>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]
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