Question

I have a dictionary with each key containing a list as a value. And I’m trying to go over all the items in the lists, and let’s say I’m trying to print all the items as I go through, I wrote:

for item in aDict: 
    for item2 in aDict[item]: 
        print item2

This prints out the items in the list for the first value, then it gives me an error saying “iteration over non-sequence”. Why is this and how should I do this?

Thanks in advance.

Answer 1

I’m assuming one of the items in aDict is not a sequence, string, list, tuple etc:

>>> aDict = { 'a' : [1, 2, 3,], 'b' : [4, 5, 6,], 'c' : [7, 8, 9,] }
>>> for item in aDict:
...     for item2 in aDict[item]:
...         print item2
...
1
2
3
7
8
9
4
5
6
>>>