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isdisjoint() function in Python

  • Difficulty Level : Basic
  • Last Updated : 05 Oct, 2021

Python set isdisjoint() function check whether the two sets are disjoint or not, if it is disjoint then it returns True otherwise it will return False. Two sets are said to be disjoint when their intersection is null. In simple words, they do not have any common element in between them. 


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Let set A = {2, 4, 5, 6}
and set B = {7, 8, 9, 10} 

Set A and set B are said to be disjoint sets as their intersection is null. They do not have any common elements in between them. 

Python isdisjoint()  Syntax


Python isdisjoint() Parameters

The isdisjoint() Python method takes only a single argument. It can also take an iterable (list, tuple, dictionary, and string) to disjoint(). The isdisjoint() method will automatically convert iterables to set and checks whether the sets are disjoint or not.

Python isdisjoint() Return Value

returns Trueif the two sets are disjoint. 
returns Falseif the twos sets are not disjoint.

Python set isdisjoint() example

Example 1: Working set isdisjoin()


# Python3 program for isdisjoint() function
set1 = {2, 4, 5, 6}
set2 = {7, 8, 9, 10}
set3 = {1, 2}
# checking of disjoint of two sets
print("set1 and set2 are disjoint?",
print("set1 and set3 are disjoint?",


set1 and set2 are disjoint? True
set1 and set3 are disjoint? False

Example 2: Python isdisjoint() with Other Iterables as arguments


# Set
A = {2, 4, 5, 6}
# List
lis = [1, 2, 3, 4, 5]
# Dictionary dict, Set is formed on Keys
dict = {1: 'Apple', 2: 'Orage'}
# Dictionary dict2
dict2 = {'Apple': 1, 'Orage': 2}
print("Set A and List lis disjoint?", A.isdisjoint(lis))
print("Set A and dict are disjoint?", A.isdisjoint(dict))
print("Set A and dict2 are disjoint?", A.isdisjoint(dict2))


Set A and List lis disjoint? False
Set A and dict are disjoint? False
Set A and dict2 are disjoint? True

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