On 2014-02-03 13:36, Jean Dupont wrote: > I have a list like this: > [1,2,3] > > 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 this, do lst.append(4) and then inspect dupes1 compared to dupes2/dupes3. -tkc -- https://mail.python.org/mailman/listinfo/python-list
