Lists, Tuples & Sets

What are Collections?

Collections are used to store multiple values in a single variable.

Python provides different collection types. In this lesson, we will learn:

1. Lists

A list is an ordered and changeable collection of items.

Lists are created using square brackets [].

fruits = ["Apple", "Banana", "Mango"]

print(fruits)

['Apple', 'Banana', 'Mango']

Accessing List Items

fruits = ["Apple", "Banana", "Mango"]

print(fruits[0])
print(fruits[2])

Apple
Mango

2. List Methods

Python provides several methods for modifying lists.

append()   Add an item
remove()   Remove an item
pop()      Remove an item by position
sort()     Sort the list

Example

numbers = [3, 1, 4]

numbers.append(5)
numbers.sort()

print(numbers)

[1, 3, 4, 5]

3. Tuples

A tuple is an ordered collection that cannot be changed after creation.

Tuples are created using parentheses ().

colors = ("Red", "Green", "Blue")

print(colors)
print(colors[0])

('Red', 'Green', 'Blue')
Red

4. Sets

A set is an unordered collection of unique values.

Sets are created using curly brackets {}.

numbers = {1, 2, 3, 3, 4}

print(numbers)

{1, 2, 3, 4}

Duplicate values are automatically removed from a set.

5. List vs Tuple vs Set

List  → Ordered, Changeable, Allows duplicates

Tuple → Ordered, Unchangeable, Allows duplicates

Set   → Unordered, Changeable, No duplicates

6. Practical Example

We can use a list to store the marks of a student.

marks = [80, 75, 90, 85, 88]

total = sum(marks)

print("Total Marks =", total)
print("Highest Marks =", max(marks))

Total Marks = 418
Highest Marks = 90

Quick Quiz