if foo is None: ...
Read: None vs Null
Example check null Python
A simple example code to test for None use is the operator.
a = None if a is None: print("a is", a) else: print("Value of a", a)
value = None # Using the 'is' operator if value is None: print("The value is None") # Using the equality operator '==' if value == None: print("The value is None") # Alternatively, you can use the 'not' operator to check if a value is not None if value is not None: print("The value is not None")
Python if not null or empty
Even space or defined variable is counted as a not a null variable in Python. You should define it as a None.
var = " " if var is not None: print('Var is not null')
Var is not null
None is a special object that represents the absence of a value. It is commonly used to indicate the absence of a meaningful result or to initialize a variable that will be assigned a value later on.
Do comment if you have any doubts or suggestions on this Python Basic topic
Note: IDE: PyCharm 2021.3.3 (Community Edition)
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.