Identity Operators

Identity Operators:

+-----------+--------------------------------+
|   is      |  is having the same id()?      |
|   is not  |  is not having the same id()?  |
+-----------+--------------------------------+

Using identity operators we can check if two objects share the same memory location. We can check this with the id() function also. The expression a is b results in True if id(a) is equal to id(b).

Example:

a = 5
b = 5
if a is b:
    print("a and b have same identity:")
    print("id:",id(a),"and",id(b))
else:
    print("a and b have different identities:")
    print("id:",id(a),"and",id(b))
b = 10
if a is b:
    print("a and b have the same identity: ")
    print("id:",id(a),"and",id(b))
else:
    print("a and b have different identities:")
    print("id:",id(a),"and",id(b))

Output:

a and b have same identity:
id: 140719525389264 and 140719525389264
a and b have different identities:
id: 140719525389264 and 140719525389424

We can also find the type of an object using identity operators. The following example converts the variable code to a string if code is not of type string.

code = 91
if type(code) is not str:
    print("Country code: +" + str(code))

Output:

Country code: +91

.