Tuples

A tuple is like a list, but unchangeable. Once you make one, you can't add, remove, or change items.

Create a tuple

python
thistuple = ("apple", "banana", "cherry")
print(thistuple)

Tuple properties

• Ordered: items keep their order.
• Unchangeable: no add, remove, or change after creation.
• Allow duplicates: the same value can appear more than once.

One item needs a trailing comma

python
thistuple = ("apple",)
print(type(thistuple))

### <class 'tuple'>

Without the comma, ("apple") is just the string "apple".

Access items

Indexing works exactly like a list:

python
print(thistuple[0])

### apple
print(thistuple[-1])

### cherry

Length

python
print(len(thistuple))

### 3

Mixed types

python
mixed = (1, "two", 3.0, True)

Why use tuples?

• They protect data from accidental changes.
• They're faster than lists.
• They can be used as dictionary keys (lists can't).

TL;DR

• Tuples use ( ) and are unchangeable.
• They allow duplicates and are ordered.
• One-item tuples need a trailing comma.
• Good for data that shouldn't change.