{"id":55,"date":"2026-03-01T15:18:33","date_gmt":"2026-03-01T10:18:33","guid":{"rendered":"https:\/\/gigz.pk\/python\/?post_type=lesson&p=55"},"modified":"2026-03-13T09:25:42","modified_gmt":"2026-03-13T04:25:43","slug":"membership-and-identity-operators","status":"publish","type":"lesson","link":"https:\/\/gigz.pk\/python\/lesson\/membership-and-identity-operators\/","title":{"rendered":"Membership and Identity Operators"},"content":{"rendered":"\n

Membership and identity operators are used to test specific conditions in Python programs. While membership operators check whether a value exists inside a sequence, identity operators check whether two variables refer to the same object in memory.<\/p>\n\n\n\n

Understanding these operators helps in writing efficient and logical programs.<\/p>\n\n\n\n

MEMBERSHIP OPERATORS<\/strong><\/h1>\n\n\n\n

Membership operators are used to check whether a value is present in a sequence such as a string, list, or tuple.<\/p>\n\n\n\n

There are two membership operators:<\/p>\n\n\n\n

in
not in<\/p>\n\n\n\n

IN OPERATOR<\/strong><\/h1>\n\n\n\n

The in operator returns True if the specified value exists in the sequence.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

numbers = [1, 2, 3, 4, 5]
print(3 in numbers)<\/p>\n\n\n\n

Output will be True.<\/p>\n\n\n\n

Example with string:<\/p>\n\n\n\n

text = “Python Programming”
print(“Python” in text)<\/p>\n\n\n\n

Output will be True.<\/p>\n\n\n\n

NOT IN OPERATOR<\/strong><\/h1>\n\n\n\n

The not in operator returns True if the specified value does not exist in the sequence.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

numbers = [1, 2, 3, 4, 5]
print(10 not in numbers)<\/p>\n\n\n\n

Output will be True.<\/p>\n\n\n\n

IDENTITY OPERATORS<\/strong><\/h1>\n\n\n\n

Identity operators are used to compare the memory location of two objects. They check whether two variables refer to the same object.<\/p>\n\n\n\n

There are two identity operators:<\/p>\n\n\n\n

is
is not<\/p>\n\n\n\n

IS OPERATOR<\/strong><\/h1>\n\n\n\n

The is operator returns True if both variables refer to the same object in memory.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

x = [1, 2, 3]
y = x<\/p>\n\n\n\n

print(x is y)<\/p>\n\n\n\n

Output will be True because both variables point to the same object.<\/p>\n\n\n\n

IS NOT OPERATOR<\/strong><\/h1>\n\n\n\n

The is not operator returns True if two variables do not refer to the same object.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

x = [1, 2, 3]
y = [1, 2, 3]<\/p>\n\n\n\n

print(x is not y)<\/p>\n\n\n\n

Output will be True because both lists are separate objects in memory.<\/p>\n\n\n\n

DIFFERENCE BETWEEN EQUALITY AND IDENTITY<\/strong><\/h1>\n\n\n\n

The equality operator == checks whether the values are equal.
The identity operator is checks whether the objects are the same in memory.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

x = [1, 2, 3]
y = [1, 2, 3]<\/p>\n\n\n\n

print(x == y)
Output will be True<\/p>\n\n\n\n

print(x is y)
Output will be False<\/p>\n\n\n\n

WHY THESE OPERATORS ARE IMPORTANT<\/strong><\/h1>\n\n\n\n

Membership operators help in searching and validating data inside sequences. Identity operators help in understanding how objects are stored in memory.<\/p>\n\n\n\n

Mastering membership and identity operators allows you to write more efficient and logically correct Python programs.<\/p>\n\n\n

Home<\/a><\/span> \u00bb PYTHON FUNDAMENTALS (PYF) > Operators > Membership and Identity Operators<\/span><\/span><\/div>\n\n\n
<\/strong>

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