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Python Set Methods

Python Tutorial

Introduction

Python Data Types & Oper...

Python Strings

Python Lists

Python Tuples

Python Sets

Python Dictionaries

Conditional Statements

Python Loops

Python Functions

Python Modules

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File Handling

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Python Set Methods

Set Methods in Python

Beyond adding and removing items, Python sets offer methods to compare and analyze relationships between sets — just like in mathematics.

isdisjoint(): Are the sets completely different?

This method checks if two sets have no items in common.

Returns True if they are completely disjoint.
Returns False if they share even one item.

Example 1:

				
					group_a = {"Karachi", "Lahore", "Multan"}
group_b = {"Quetta", "Peshawar"}
print(group_a.isdisjoint(group_b))

Output:

				
					True

Example 2:

				
					group_a = {"Karachi", "Lahore", "Multan"}
group_b = {"Lahore", "Peshawar"}
print(group_a.isdisjoint(group_b))

Output:

				
					False

issuperset(): Does one set contain everything from another?

This method checks if all items of the second set exist in the first one.

Returns True if the first set includes all elements of the second.
Returns False otherwise.

Example 1:

				
					languages = {"Python", "Java", "C++", "JavaScript"}
required = {"Java", "Python"}
print(languages.issuperset(required))

Output:

				
					True

Example 2:

				
					languages = {"Python", "Java", "C++", "JavaScript"}
required = {"C#", "Python"}
print(languages.issuperset(required))

Output:

				
					False

issubset(): Is one set fully contained within another?

This method checks if all items of the first set exist in the second one.

Returns True if the first set is fully contained in the second.
Returns False otherwise.

Example 1:

				
					skills = {"HTML", "CSS"}
web_stack = {"HTML", "CSS", "JavaScript", "React"}
print(skills.issubset(web_stack))

Output:

				
					True

Example 2:

				
					skills = {"HTML", "SQL"}
web_stack = {"HTML", "CSS", "JavaScript", "React"}
print(skills.issubset(web_stack))

Output:

				
					False

Summary

isdisjoint() → Checks for no common items.
issuperset() → First set must contain all items of the second.
issubset() → First set must be completely inside the second.

These methods are essential when comparing data across groups, such as verifying permissions, checking coverage, or validating data categories.

Keep practicing — only on Learn With Arshyan.