Converting a list of strings into a list of integers?

David Robinow drobinow at gmail.com
Sun Jul 22 19:03:10 CEST 2012


On Sun, Jul 22, 2012 at 12:20 PM, Jan Riechers <janpeterr at freenet.de> wrote:
> On 22.07.2012 18:39, Alister wrote:
>> looks like a classic list comprehension to me and can be achieved in a
>> single line
>> MODUS_LIST=[int(x) for x in options.modus_list]
> Hi,
>
> I am not sure why everyone is using the for-iterator option over a "map",
> but I would do it like that:
> MODUS_LIST= map(int, options.modus_list)
>
> "map" works on a list and does commandX (here "int" conversion, use "str"
> for string.. et cetera) on sequenceY, returning a sequence. More in the help
> file.
>
> And if I'm not completely mistaken, it's also the quicker way to do
> performance wise. But I can't completely recall the exact reason.
 Because if you don't have a functional background 'map' is
unfamiliar. Although I've been aware of it for years I still can't
remember if it's map(int, list) or map(list,int) and although with a
small effort I could force it into my brain, I know that many of the
people reading my code are as ignorant as I am. The list comprehension
seems clearer to me.



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