Python Set Exercise with Solutions

Set in Python is an unordered collection of items. Every item is unique in it. i.e., the set doesn’t allow duplicates.

This Python set exercise aims to help you to learn and practice set operations. All questions are tested on Python 3.

This Python set exercise includes the following: –

• It contains 10 questions on set operations, manipulations, and set functions.
• This coding exercise includes set assignments, programs and challenges.

When you complete each question, you get more familiar with the Python set. Let us know if you have any alternative solutions. It will help other developers.

• Use Online Code Editor to solve exercise questions.
• Read the complete guide on Python Sets to solve this exercise.

Exercise 1: Add a list of elements to a set

Given a Python list, Write a program to add all its elements into a given set.

Given:

sample_set = {"Yellow", "Orange", "Black"}
sample_list = ["Blue", "Green", "Red"]

Expected output:

Note: Set is unordered.

{'Green', 'Yellow', 'Black', 'Orange', 'Red', 'Blue'}

sample_set = {"Yellow", "Orange", "Black"}
sample_list = ["Blue", "Green", "Red"]

sample_set.update(sample_list)
print(sample_set)

Exercise 2: Return a new set of identical items from two sets

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

Expected output:

{40, 50, 30}

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

print(set1.intersection(set2))

Exercise 3: Get Only unique items from two sets

Write a Python program to return a new set with unique items from both sets by removing duplicates.

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

Expected output:

{70, 40, 10, 50, 20, 60, 30}

Note: set is unordered, so not necessary this will be the order of the item.

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

print(set1.union(set2))

Exercise 4: Update the first set with items that don’t exist in the second set

Given two Python sets, write a Python program to update the first set with items that exist only in the first set and not in the second set.

Given:

set1 = {10, 20, 30}
set2 = {20, 40, 50}

Expected output:

set1 {10, 30}

set1 = {10, 20, 30}
set2 = {20, 40, 50}

set1.difference_update(set2)
print(set1)

Exercise 5: Remove items from the set at once

Write a Python program to remove items 10, 20, 30 from the following set at once.

Given:

set1 = {10, 20, 30, 40, 50}

Expected output:

{40, 50}

set1 = {10, 20, 30, 40, 50}
set1.difference_update({10, 20, 30})
print(set1)

Exercise 6: Return a set of elements present in Set A or B, but not both

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

Expected output:

{20, 70, 10, 60}

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

print(set1.symmetric_difference(set2))

Exercise 7: Check if two sets have any elements in common. If yes, display the common elements

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {60, 70, 80, 90, 10}

Expected output:

Two sets have items in common
{10}

set1 = {10, 20, 30, 40, 50}
set2 = {60, 70, 80, 90, 10}

if set1.isdisjoint(set2):
  print("Two sets have no items in common")
else:
  print("Two sets have items in common")
  print(set1.intersection(set2))

Exercise 8: Update set1 by adding items from set2, except common items

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

Expected output:

{70, 10, 20, 60}

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

set1.symmetric_difference_update(set2)
print(set1)

Exercise 9: Remove items from set1 that are not common to both set1 and set2

Given:

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

Expected output:

{40, 50, 30}

set1 = {10, 20, 30, 40, 50}
set2 = {30, 40, 50, 60, 70}

set1.intersection_update(set2)
print(set1)