[Baypiggies] python list manipulation using map

[Rami Chowdhury]

On May 2, 2011, at 23:37 , Vikram K wrote:
> i have a list whose elements are strings. all the elements in the list are numbers but are represented as string type and i wish to convert them to int type. i tried using map but the output is not what i want. please help.
> 
>  x = ['0', '0', '20', '15', '42', '0', '0', '0', '0', '0', '0', '0', '0', '52', '57', '0', '254', '0', '177', '0', '617', '1021979']
> 
> >>> T2 = [map(int, i) for i in x]

map() calls the function across all elements in an iterable, and since strings are iterable in Python, the above actually calls map() on each item in your list. What you want is map(int, x) :-)

> >>> T2
> [[0], [0], [2, 0], [1, 5], [4, 2], [0], [0], [0], [0], [0], [0], [0], [0], [5, 2], [5, 7], [0], [2, 5, 4], [0], [1, 7, 7], [0], [6, 1, 7], [1, 0, 2, 1, 9, 7, 9]]
> 
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-------------
Rami Chowdhury
"Never assume malice when stupidity will suffice." -- Hanlon's Razor
+44-7581-430-517 / +88-0189-245544 / +1-408-597-7068 




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