Tuples in Python

Tuples are another versatile data structure in Python, similar to lists but with one key difference: they are immutable. This means once a tuple is created, its elements cannot be changed.

Creating Tuples

Tuples are created by placing items inside parentheses (), separated by commas. You can also create a tuple without parentheses (called tuple packing).

# Tuple with parentheses
fruits = ("apple", "banana", "cherry")

# Tuple without parentheses (tuple packing)
colors = "red", "green", "blue"

# Single-item tuple (note the trailing comma)
single = ("apple",)

# Empty tuple
empty = ()

Accessing Elements

Accessing elements in a tuple is identical to lists, using zero-based indexing.

fruits = ("apple", "banana", "cherry")
print(fruits[0])  # Output: apple
print(fruits[-1]) # Output: cherry

Tuple Slicing

Slicing works the same way as it does for lists and strings.

numbers = (0, 1, 2, 3, 4, 5)
print(numbers[1:4])  # Output: (1, 2, 3)

Tuple Unpacking

You can extract the values of a tuple into multiple variables.

fruits = ("apple", "banana", "cherry")
(green, yellow, red) = fruits

print(green)  # Output: apple
print(yellow) # Output: banana
print(red)    # Output: cherry

Tuple Methods

Since tuples are immutable, they only have two built-in methods.

Method	Description
count(item)	Returns the number of times a value occurs in a tuple
index(item)	Searches for a specific value and returns its first position

numbers = (1, 2, 3, 2, 4)
print(numbers.count(2)) # Output: 2
print(numbers.index(3)) # Output: 2

Tuples vs. Lists

Feature	Tuple	List
Mutability	Immutable (cannot change)	Mutable (can change)
Syntax	Parentheses ()	Square brackets []
Performance	Faster than lists	Slower than tuples
Use Case	Fixed collections of data	Data that needs to be modified