On 2:59 PM, 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? >
The official Python documentation [1] notes that "zip() <http://docs.python.org/library/functions.html#zip> in conjunction with the * operator can be used to unzip a list". Ex: >>> L = [ (1,'a'), (2,'b'), (3,'c'), (4,'d') ] >>> zip(*L) [(1, 2, 3, 4), ('a', 'b', 'c', 'd')] HTH, John [1] http://docs.python.org/library/functions.html
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