strange side effect with lists!?
Michael Hoffman
m.h.3.9.1.without.dots.at.cam.ac.uk at example.com
Wed Oct 13 04:52:03 EDT 2004
Wolfgang.Stoecher at profactor.at wrote:
>
>>>>l1 = [1] # define list
>>>>l2 = l1 # copy of l1 ?
Nope, l2 is l1:
>>> l2 is l1
True
The same happens for any mutable object.
If you want to just do a surface-level copy of l1, you can use l1[:].
But if any of the items in l1 are mutable objects, you probably want to
use copy.deepcopy().
--
Michael Hoffman
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