How to Properly Check if a Variable is Not Null in Python

1. Checking if the variable is not null [Method 1]

#variable
var = "hello python"

#check is not null
if var is not None:
    print('Var is not null')

output

Var is not null

2. Checking if the variable is not null [Method 2]

#variable
var = "hello python"

#check is not null
if var:
    print('Var is not null')

output

Var is not null

3. Checking if the variable is not null [Method 3]

test = "hello python"

# if variable is not null
if test != None :
    print('yes! the var is not null')
    

output

yes! the var is not null

Conclusion

All methods work perfectly, but method number 2 is the best way to check if a variable is not null (None)

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