Python set issubset(): Subset and <= Examples

A.issubset(B) returns True when every element of A is present in B. The method can test another iterable; for set-to-set comparisons you can also use A <= B.

For the reverse relationship, use issuperset(). To test for no shared elements, use isdisjoint().

Set order: sets are unordered. Whenever an example prints a set, the displayed element order can differ between runs or Python environments.

A={'x','y','z','a','b','c'}
B={'x','y','z'}
print(B.issubset(A))

Output ( All elements of B is present in inside A )

True

A={'x','y','z','a','b','c'}
B={'x','y','z','k','l','m'}
print(B.issubset(A))

Output ( There are elements in B which are not in A )

False

Using a String

String is an iterable objects

A={'y','t','W','o','e'}
B='Welcome to Python'
print(A.issubset(B))

Output ( here all elements of A is present in B )

True

Using a List

List is an iterable objects

A={'x','y'}
B=['a','b','x','y']
print(A.issubset(B))

Output

True

All Set Methods Subset / Superset / Disjoint Questions with solutions on set isdisjoint() issuperset()

tuple set Dictionary Python- Tutorials

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Python set issubset() Method

Using a String

Using a List

Subhendu Mohapatra