how to separate a list into two lists?

bud only at fleshwound.org
Sat Aug 6 20:13:20 CEST 2011


On Sun, 07 Aug 2011 01:07:00 +0800, smith jack wrote:

> if a list L is composed with tuple consists of two elements, that is L =
> [(a1, b1), (a2, b2) ... (an, bn)]
> 
> is there any simple way to divide this list into two separate lists ,
> such that L1 = [a1, a2... an]
> L2=[b1,b2 ... bn]
> 
> i do not want to use loop, any methods to make this done?


(x,y) = [ [z[i] for z in L] for i in range(len(L[0]))]

x
: ['a1', 'a2', 'an']

y
: ['b1', 'b2', 'bn']





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