Python Set issuperset() Method

The issuperset() method checks whether a set contains all elements of another set (or iterable). It returns True if the set is a superset of the specified set (or iterable), and False otherwise.

Syntax

set1.issuperset(set2)

Parameters

set2 (required): The set or iterable to compare against.

Return Value

Returns True if the set contains all elements of the other set.

Returns False otherwise.

Examples

Example 1: Check if one set contains all elements of another

set1 = {1, 2, 3, 4, 5}
set2 = {1, 2, 3}
set3 = {1, 2, 9}

print(set1.issuperset(set2)) # Output: True
print(set1.issuperset(set3)) # Output: False

Example 2: Equal sets

A set is a superset of itself.

set1 = {1, 2, 3}
set2 = {1, 2, 3}

print(set1.issuperset(set2)) # Output: True

Example 3: With different iterable types

The issuperset() method also works with iterables of different types, such as lists or tuples.

set1 = {1, 2, 3, 4, 5}
list1 = [1, 2, 3]  # a list
tuple1 = (1, 2, 5) # a tuple

print(set1.issuperset(list1)) # Output: True
print(set1.issuperset(tuple1)) # Output: True

Using The `>=` Operator

You can also use the >= operator to check whether one set is a superset of another.

For example:

set1 = {1, 2, 3, 4, 5}
set2 = {1, 2, 3}  

print(set1 >= set2) # Output: True

Proper Superset

A superset is a set that contains all elements of another set and is strictly larger. The two sets cannot be equal.