assign multiple instances of a class to variables

Python. I need to assign multiple class instances to number of variables. First i tried this:

a = b = c = []

but they all refer to the same object, which is not what I need.开发者_如何学运维 This works better:

(a, b, c) = [[] for i in range(3)]

but it seems a bit too verbose. Is there a shorter way to do this?

UPDATE: OK, so this is not really Pythonic to cram everything into one line, question resolved.

But if this worked it'd be really cool:

a,b,c = []*3

And this line creates three references to the same object:

a,b,c = [[]] * 3

Oh well...

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a, b, c = [], [], []

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simply:

a = []
b = []
c = []

(python is not perl, there is no need for one-liners)

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a = []
b = a[:]
import copy
c = copy.copy(b)

You could use these if you want them all initialized to something other than []