How to find the number of nested lists in a list?

Question

The function takes a list and returns an int depending on how many lists are in the list not including the list itself. (For the sake of simplicity we can assume everything

Answer 1

You can do it with a recursion function :

def count(l):
    return sum(1+count(i) for i in l if isinstance(i,list))

Demo:

>>> x=[1,2,[[[]]],[[]],3,4,[1,2,3,4,[[]] ] ]
>>> count(x)
8