To check if a set A is a superset of set B in Python, use the **issuperset()** method.

For instance:

A = {1, 2, 3, 4, 5, 6} B = {1, 2, 3} print(A.issuperset(B))

Result:

True

You can also use the built-in comparison operators to check for supersets in Python.

For instance, to check if set A is a superset of B, use the less than or equal `>=`

operator:

A = {1, 2, 3, 4, 5, 6} B = {1, 2, 3} print(A >= B)

Result:

True

## A Word on Set Theory

Say you have two sets A and B.

- Set A is a
**superset**of B if all the elements of set B are in set A. - Set A set is always a
**superset of itself**. - Set A is a
**proper superset**of B if set A is a superset of set B**and**the set A has elements B does not.

Here is a Venn diagram of set A being a (proper) superset of set B:

### How to Check If a Set Is a Superset in Python

In Python, there is an `issuperset()`

method you can use to check if a set is a superset of another set.

Here is the syntax:

A.issuperset(B)

This returns `True`

if `A`

is a superset of `B`

. Otherwise, it returns `False`

.

Alternatively, you can also use comparison operators to do the same:

A >= B

For instance:

A = {1, 2, 3, 4, 5, 6} B = {1, 2, 3} print(A.issuperset(B)) # Or print(A >= B)

Result:

True True

### A Set Is a Superset of Itself

A set is always a superset of itself.

You can use the `issuperset()`

method to verify this:

A = {1, 2, 3} print(A.issuperset(A)) # Or print(A >= A)

Output:

True True

### How to Check If a Set Is a Proper Superset in Python

Set A is a proper superset of set B if all the elements of set B are in set A and set A has element(s) that set B does not have.

In Python, there is no dedicated method to check if a set is a proper subset of another set.

To check if a set is a proper superset of another set, use the less-than comparison operator:

A = {1, 2, 3, 4, 5, 6} B = {1, 2, 3} # Proper superset print(A > B)

Output:

True

## Conclusion

Today you learned how to use `issuperset()`

method in Python. You also learned some basic set theory.

- Set A is a superset of set B if set A has all the elements of set B.
- Set A is a proper superset of B if all elements of set B are in set A but set A has at least one element that set B does not.
- A set is always a superset of itself.

In Python, you can check if set A is a superset of set B by:

**A.issuperset(B)****A**`>`

= B

To check if a set A is a proper superset of set B:

**A > B**

Thanks for reading. I hope you find it useful.

Happy coding!