🐍 Tuple

list

Good to know

⭐️ Tuples are like lists, but immutable (cannot be changed after creation). They preserve order and allow duplicates. Tuples excel when you need fixed collections, safe data, or dictionary keys.

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Creating Tuples

tools = ("fork", "spoon", "knife")
nums = (1, 2, 3, 3)
single = ("one",)     # comma required for single-element tuple
tuple_from_list = tuple([1, 2, 3]) # takes list & turns into (1,2,3)

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Unpacking Tuples

item1, item2, item3 = tools
# fork, spoon, knife

With the star operator:

first, *rest = nums
# first = 1, rest = [2, 3, 3]

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Using Tuples as Dictionary Keys

⭐️ Tuples can be used as keys because they are immutable.

coords = {}
coords[(10, 20)] = "Tree"

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Manipulate tuples

Accessing Elements

first = tools[0]
last = tools[-1]
part = tools[1:3]     # slicing works like with lists

Modify

tools[1] = "bowl"   # ❌ ERROR – cannot modify

To “modify”, create a new tuple:

new_tools = tools + ("bowl",)

Tuple Methods

nums.count(3)     # how many times 3 appears
nums.index(3)     # first index of 3