Python NOT EQUAL operator

In this article, we are going to see != (Not equal) operators. In Python != is defined as not equal to operator. It returns True if operands on either side are not equal to each other, and returns False if they are equal. 

Note: It is important to keep in mind that this comparison operator will return True if  the values are same but are of different data types.

Syntax: Value A != Value B

Example 1: Comparing different values of the same data type

Python3

A = 1
B = 2
C = 2

print(A!=B)
print(B!=C)

Output:

True
False

Example 2: Comparing same values of different data type

Python3

A = 1
B = 1.0
C = "1"

print(A!=B)
print(B!=C)
print(A!=C)

Output:

False
True
True

Example 3: Python not equal with custom object

The __ne__() gets called whenever the not equal operator is used. We can override this function to alter the nature of the not equal operator.

Python3

class Student:

    def __init__(self, name):
        self.student_name = name

    def __ne__(self, x):
        # return true for different types
        # of object
        if type(x) != type(self):
            return True

        # return True for different values
        if self.student_name != x.student_name:
            return True
        else:
            return False

s1 = Student("Shyam")
s2 = Student("Raju")
s3 = Student("babu rao")

print(s1 != s2)
print(s2 != s3)

Output:

True
True