How to make if reread the entire array?

Question

Python

The essence of the question is to check the array not through for

Example:
As it should be

massiv = [10,20,30,40]
if(40 == massiv):
    print('work')

How do I know and how does not suit me

massiv = [10,20,30,40]
for i in massiv:
    if(i == 40):
        print('work')

Answer 1

if 40 in massiv:
    ....

Answer 2

foreach