seriously, appreciate man !! hah
but, use advantage of python :)

2 things

• really like it :)
• He didn't use i for loop

The error message clearly explains everything: you can't iterate over None.

You're trying to iterate over None, that's what the error means. Did you check the input was a list before trying to iterate over it?

a or b might be nil or null or None or nothing

Hello Coder's Family,
I Passed all test (5 out of 5) But this error show up

Traceback (most recent call last):
File "main.py", line 21, in
test.assert_equals(comp(a1, a2), False)
File "/home/codewarrior/solution.py", line 3, in comp
for a in array2:
TypeError: 'NoneType' object is not iterable

Why and anyone explain me

simple and clear, GOOD :)