Python: appending one list inside a list of lists

Asked Sep 12 '17 at 18:37

Active Sep 12 '17 at 18:37

Viewed 36 times

I have initialized a list of empty lists, like so:

>>> myList = [[]]*5
>>> myList
[[], [], [], [], []]

and I'm wanting to append one of those lists with something:

>>> myList[2].append(3)

but it appends 3 to all of my lists:

>>> myList
[[3], [3], [3], [3], [3]]

How can I append to just one of these lists?

asked Sep 12 '17 at 18:37

Brad Flynn

2

You have a list with 5 references to a *single list object*. – Martijn Pieters Sep 12 '17 at 18:39
Ahh that makes sense, thanks! – Brad Flynn Sep 12 '17 at 18:42

0 Answers0