[newbie] copying identical list for a function argument
python.list at tim.thechases.com
Mon Feb 3 22:51:23 CET 2014
On 2014-02-03 13:36, Jean Dupont wrote:
> I have a list like this:
> The argument of my function should be a repeated version e.g.
> [1,2,3],[1,2,3],[1,2,3],[1,2,3] (could be a different number of
> times repeated also)
> what is the prefered method to realize this in Python?
> any help would be really appreciated
It depends on whether you want the contained list to be the *same*
list or *copies* of that list. You can do either of the following:
lst = [1,2,3]
dupes1 = [lst[:] for _ in range(5)]
dupes2 = [lst for _ in range(5)]
dupes3 = [lst] * 5
The dupes2 and dupes3 should be the same (the latter is a simpler
syntax for it): each contains the same list multiple times. To see
and then inspect dupes1 compared to dupes2/dupes3.
More information about the Python-list