Python Sets - Comprehensive Guide with Examples and Exercises

Master Python data types with this comprehensive guide. Learn about numeric, string, boolean, and collection data types with examples, exercises, and tasks. Perfect for beginners and professionals to enhance their Python programming skills.

In Python, a set is an unordered collection of unique elements, meaning no duplicates are allowed. Sets are useful when you want to store multiple items but don’t need to keep them in a particular order, and you want to ensure that each item only appears once.

Creating a Set

You can create a set using curly braces {} or the set() function.

# Creating a set using curly braces
my_set = {1, 2, 3, 4, 5}

# Creating a set using the set() function
my_set = set([1, 2, 3, 4, 5])

Example:

# Creating a set
fruits = {"apple", "banana", "cherry", "apple"}

# Displaying the set
print(fruits)  # Output: {'apple', 'banana', 'cherry'}

Notice how apple only appears once, even though we tried to add it twice.

Task 14: Creating a Set

Write a Python program that:

• Creates a set with four different numbers.
• Prints the set.

Example Output:

Numbers: {1, 2, 3, 4}

Task 15: Removing Duplicates Using a Set

Write a Python program that:

• Takes a list with duplicate numbers.
• Converts it into a set to remove duplicates.
• Prints the unique numbers.

Example Input:

Original List: [1, 2, 2, 3, 3, 4, 5]

Example Output:

Unique Numbers: {1, 2, 3, 4, 5}

Task 17: Creating and Using a Set

Write a Python program that:

• Creates a set of unique numbers from a given list (including duplicate values).
• Prints the unique numbers.

Example Input:

Original List: [1, 2, 2, 3, 4, 4, 5]

Expected Output:

Unique Numbers: {1, 2, 3, 4, 5}

Task 18: Set Operations

Write a Python program that:

• Creates two sets: one with even numbers and one with prime numbers (both from 1 to 10).
• Finds the union (all unique numbers from both sets).
• Finds the intersection (numbers that are in both sets).
• Prints the results.

Expected Output:

Even Numbers: {2, 4, 6, 8, 10}
Prime Numbers: {2, 3, 5, 7}
Union: {2, 3, 4, 5, 6, 7, 8, 10}
Intersection: {2}

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