Python None Keyword
Assign the value None to a variable:
Definition and Usage
None keyword is used to define a null
value, or no value at all.
None is not the same as 0, False, or an empty string. None is a data type of its own (NoneType) and only None can be None.
If you do a boolean if test, what will happen? Is None True or False:
print("Do you think None is True?")
elif x is False:
print ("Do you think None is False?")
print("None is not True, or False, None is just None...")