Python set issubset() method returns True if all elements of a set A are present in another set B which is passed as an argument, and returns False if all elements are not present in Python.
Python Set issubset() Method Syntax:
Syntax: set_obj.issubset(other_set)
Parameter:
- other_set: any other set to compare with.
Return: bool
Python set issubset() Method Example:
Python3
s1 = {1, 2, 3, 4, 5} s2 = {4, 5} # Output True, since, s2 elements in s1 print(s2.issubset(s1)) |
Output:
True
Python set issubset() method
Example 1: How Python set issubset() work
Python
A = {4, 1, 3, 5} B = {6, 0, 4, 1, 5, 0, 3, 5} # Returns True print(A.issubset(B)) # Returns False # B is not subset of A print(B.issubset(A)) |
Output:
True False
Example 2: Working with three-set using issubset()
Python
# Another Python program to demonstrate working # of issubset(). A = {1, 2, 3} B = {1, 2, 3, 4, 5} C = {1, 2, 4, 5} # Returns True print(A.issubset(B)) # Returns False # B is not subset of A print(B.issubset(A)) # Returns False print(A.issubset(C)) # Returns True print(C.issubset(B)) |
Output:
True False False True
