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Collections (Tuple, Set, Dictionary)

Learning Objectives

• Use tuple for fixed data.
• Use set for unique values and set operations.
• Use dictionary for key-value storage.

Example

t = (10, 20, 10)
print(t.count(10), t.index(20))

s = {1, 2, 2, 3}
s.add(4)
print(s)

d = {"name": "Ravi", "marks": 88}
print(d.get("name"))
d["grade"] = "A"
print(d)

Dry Run

• Tuple keeps duplicates and order.
• Set removes duplicates automatically.
• Dictionary accesses values by key.

Practice

1. Build attendance set for unique roll numbers.
2. Store student details in dictionary and update marks.