Python check multiple variables for none

 

I have multiple variables in my python script.

I would like to check if any variable is None out of my variables.

Following are my variables:

a = 'a'
b = 'b'
c = None

Python has a built in method called “all” which return True if all elements of the iterable are true (or if the iterable is empty).

So here I am using all method to check if any declared variables are None. I am using following code:

print all([a, b, c])

Output:

False

print all([a, b])

Output:

True

If we observe above two print statements with all method, first statement output is False since variable c is None and second statement output is True since variables a and b are not None.