How to “test” NoneType in python?

Question

I have a method that sometimes returns a NoneType value. So how can I question a variable that is a NoneType? I need to use if method, for example

if not new:

new = '#'

I know that is the wrong way and I hope you understand what I meant.

Answer 1

As you want to “test” NoneType in python you can use is an operator, like as follows:-

if variable is None:

if variable is not None:

Comparisons to singletons like None should always be done with is or is not, never the equality operators.