Fwd: how to separate a list into two lists?

References	<CAN1Fwxcdtt0u_TT=civMes1hA2qvfkH2YckES7B7qRE++DXzJQ@mail.gmail.com> <CANaSqUc9qsKmg4n11GLC6bWfiFXWL80uzmxECuk=ZgR1D77V1Q@mail.gmail.com>
Date	2011-08-06 13:30 -0400
Subject	Fwd: how to separate a list into two lists?
From	Zero Piraeus <schesis@gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.1988.1312651853.1164.python-list@python.org> (permalink)

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:

> 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]

How about this?

>>> L = [("a1", "b1"), ("a2", "b2"), ("an", "bn")]
>>> L1, L2 = zip(*L)
>>> L1
('a1', 'a2', 'an')
>>> L2
('b1', 'b2', 'bn')

http://docs.python.org/library/functions.html#zip

 -[]z.

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Fwd: how to separate a list into two lists? Zero Piraeus <schesis@gmail.com> - 2011-08-06 13:30 -0400

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