None in Python – Object and Keyword

Introduction to None in Python

A null variable or object is define with the None keyword. The None keyword is an object in Python, and it is a data type of the NoneType class.

None can be assigned to any variable, but noneType objects cannot be created.

Note: All variables that are assigned None point to the same object. New instances of None are not created.

Syntax: The syntax of the None statement is:

None

Note: None statement supports both is and == operators.

Interesting Facts

  • It is not the same as False.
  • None is not 0.
  • Comparing None to anything will always return False except None itself.
  • None is not an empty string.

Code Examples

Example 01: Checking if a variable is None using is operator:

# Declaring a None variable
var = None

if var is None: # Checking if the variable is None
  print("None")
else:
  print("Not None")

Output:

None using is operator None in Python

Example 02: Checking if a variable is None using == operator:

# Declaring a None variable
var = None

if var == None: # Checking if the variable is None
  print("None")
else:
  print("Not None")

Output:

None using == operator None in Python

Example 03: Check the type of None object:

# Declaring a variable and initializing with None type
typeOfNone = type(None) 

print(typeOfNone)

Output:

type of None object None in Python

Example 04: Comparing None with None type:

# Comparing None with none and printing the result
print (None == None)

Output:

None with None type None in Python

Example 05: Comparing None with False type:

# Comparing none with False and printing the result
print(None == False)

Output:

None with False type

Example 06: Comparing None with empty string:

# Declaring an empty string
str = ""
# Comparing None with empty string and printing the result
print (str == None)

Output:

None with empty string

FAQs

Is None a keyword in Python?

The term None is use in Python to specify null objects and variables. While None serves some of the same functions as null in other languages, it’s a whole different beast. None is not specified to be 0 or any other value in Python because it is the null value. None is an object and a first-class citizen in Python!

Is None and null the same?

None implies nothing, and nothing is a term that expresses the absence of all things. Nothing and Null are frequently mistaken, although they are completely different ideas. Nothing denotes the lack of anything, whereas Null denotes the unknown (you do not know if there is a thing or not).

Are None and 0 the same in Python?

None is not specified to be 0 or any other value in Python because it is the null value. None is an object and a first-class citizen in Python!

Conclusion

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