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How to test a variable is null in python

Hello Guys, How are you all? Hope You all Are Fine. Today We Are Going To learn about How to test a variable is null in python in Python. So Here I am Explain to you all the possible Methods here.

Without wasting your time, Let’s start This Article.

Table of Contents

How to test a variable is null in python?

  1. How to test a variable is null in python?

    Testing for name pointing to None and name existing are two semantically different operations.

  2. test a variable is null in python

    Testing for name pointing to None and name existing are two semantically different operations.

Method 1

Testing for name pointing to None and name existing are two semantically different operations.

To check if val is None:

if val is None:
    pass  # val exists and is None

To check if name exists:

try:
    val
except NameError:
    pass  # val does not exist at all

Method 2

try:
    if val is None: # The variable
        print('It is None')
except NameError:
    print ("This variable is not defined")
else:
    print ("It is defined and has a value")

Summery

It’s all About this issue. Hope all Methods helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which Method worked for you? Thank You.

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