What is a Tuple?
A tuple in Python is like a list, but immutable (unchangeable). Think of it as a shopping receipt —you can't modify what's already printed!
Why Use Tuples?
- Faster than lists
- Protects data from accidental changes
- Can be used as dictionary keys
Creating a Tuple
Tuples are created using parentheses ().
tuple_example = ("apple", "banana", "cherry")
print(tuple_example) # Outputs: ('apple', 'banana', 'cherry')
Single-Item Tuple?
If a tuple has only one item, you must add a comma , at the end.
single_item = ("apple",) # Tuple
not_a_tuple = ("apple") # Just a string Accessing Tuple Items
Works just like lists!
print(tuple_example[0]) # Outputs: apple
print(tuple_example[-1]) # Outputs: cherry
Tuples are Immutable!
Once created, you can't change tuple elements.
tuple_example[1] = "mango" # Error! Tuples cannot be modified
Tuple Methods
Even though tuples are immutable, they have some useful methods.
count() – Counts occurrences of an item:
tuple_numbers = (1, 2, 3, 2, 2, 4)
print(tuple_numbers.count(2)) # Outputs: 3
index() – Finds the index of an item:
print(tuple_numbers.index(3)) # Outputs: 2
Looping Through a Tuple
You can loop through a tuple just like a list.
for item in tuple_example:
print(item)
Summary
| Concept | Description |
|---|---|
| Tuple | Ordered, immutable collection of items |
| Indexing | Access items using index numbers |
| Immutability | Cannot be modified after creation |
| Methods | .count(), .index() |
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