Python None keyword
Definition and Usage
None keyword is used to define null value, or no value at all.
None is different from 0, False or empty string. None is its own data type (NoneType), and only None can be None.
More Instances
Instance
If you do a boolean if test, what will happen? None is True or False:
x = None if x: print("Do you think None is True") else: print("None is not True...")