Python Set issubset() usage and example

Méthodes de collection en Python

If all elements of a set exist in another set (passed as a parameter), the issubset() method will return True. Otherwise, it returns False.

A set A is a subset of set B if all elements of set A are in set B.

Here, the set A is a subset of the set B.

The syntax of issubset() is:

A.issubset(B)

The above code checks if A is a subset of B.

issubset() return value

issubset() returns

• True if A is a subset of B

• False if A is not a subset of B

Example: How does issubset() work?

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 a subset of A
print(B.issubset(A))
# Returns False
print(A.issubset(C))
# Returns True
print(C.issubset(B))

When running the program, the output is:

True
False
False
True

If you need to check if a set is a superset of another set, you canIn PythonUseissuperset().

Méthodes de collection en Python