Check if None in nested list

Question

How to find a None in a nested listed. When I run the following code, the Hello is not printed. I do not know how to spot a None in the list of a list. Can you please help me with this simple question.

myList = [[0,1,2],[5,None,300]]

if None in myList:

print("Hello")

Answer 1

You could use any:

myList = [[0,1,2],[5,None,300]]
if any(None in l for l in myList):
    print("Hello")

Or itertools.chain:

from itertools import chain
if None in chain(*myList):
    print("Hello")