Here is my code:

def numbers_in_lists(string):num = int(string)l = list(num)return lstring = '543987'

When i run it:

print numbers_in_lists(string)

I have the following error:

l = list(num)
TypeError: 'int' object is not iterable

How can i fix this?

Thanks.

num is an integer, and list() expects an iterable, hence the error. Did you want to obtain a list of integers representing the digits of num? If so you can try using map():

l = map(int, string)