Tuples

Tuples

In this tutorial, we'll store fixed ordered collections.

A tuple stores multiple values in order, like a list, but it cannot be changed after it is created.

point = (10, 20)

Tuples are useful for fixed groups of values, such as coordinates, RGB colours, or pairs.

Accessing Tuple Items

Tuples use indexes just like lists:

point = (10, 20)

print(point[0])
print(point[1])

Output:

10
20

Unpacking Tuples

Tuple unpacking lets you assign each value to a name:

point = (10, 20)
x, y = point

print(x)
print(y)

This is often clearer than using indexes again and again.

Tuples Cannot Be Changed

This gives an error:

point = (10, 20)
point[0] = 99

If you need to add, remove, or replace items, use a list instead.

One-Item Tuples

A one-item tuple needs a comma:

single = ("Python",)

Without the comma, Python treats it as just a value in parentheses.

Tuple or List?

Use a tuple when the values belong together as one fixed group:

birth_date = (2001, 5, 14)

Use a list when you expect the collection to grow or change:

shopping_list = ["bread", "milk"]
shopping_list.append("eggs")

If you are unsure, ask: "Will I need to add, remove, or replace items?" If yes, choose a list.

Practice

Create a tuple for a rectangle size, such as (width, height). Unpack it and calculate the area.