Our today’s Python lesson shall explain how to determine whether a variable in Python is not null. 

For those who have not yet acquired, Python programming utilizes None, as known as an object, in place of null. That is why it is quite difficult for users to determine whether a Python variable is null or not if you have already got familiar with other programming languages. 

As such, when a variable is empty or to indicate default parameters that you haven’t yet specified, it acts as a form of placeholder. The None implies that the parameters are empty or default.

This little guide will assist you in deciding how to handle not null in your Python program. Let’s wait for no more but dig right in for further information!

How To Check If A Variable In Python Is Not Null?

In order to manage and verify NULL values, there are a few approaches that are vastly beneficial. Check out to see if which one is more feasible to your coding!

Method #1: Employing If Condition.

The first feasible approach to come is to use the if condition. That way, all you have to get done is merely type the syntax as follows. 

Running the code:

var = "hello kito"

#check is not null

if var:

print('Var is not null')

Output:

Var is not null

Method #2: Employing The Not Equal Operator.

Otherwise, you can also adopt the not equal operator. If the test equals none, then we could infer that it has nothing to do with being null or so.

Running the code:

test = "hello kito"

# if variable is not null

if test != None :

   print('Var is not null')

Output:

Var is not null

Method #3: Check If An Object Is None Using Python.

Last but not least, many may not think about it in the first place, but here comes the object checking technique. Saying so means if the object you are employing is none, it will also be out of the suspicion of being null.

Running the code:

var = "hello kito"

#check is not null

if var is not None:

   print('Var is not null')

The output :

Var is not null

Conclusion

Today we’ve learned a new immutable keyword and potent tool like True or False called none in Python. With the right method used in operators, none can be tested to see whether or not such a variable in Python is not null.

By addressing the Null problem for None to be useful in tracebacks, we can even resolve and pinpoint the precise issue, which we can then resolve.

So, now that you’ve racked up practical insight for your expertise, it is then time to get down the way and seize the success yourself! Also, don’t forget to catch up with our latest updates in the upcoming posts! See then!