Python · Theory

List vs Set vs Tuple vs Dictionary

Theory

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List vs Set vs Tuple vs Dictionary

Four built-ins cover almost every fresher program. List: ordered, mutable, duplicates OK — [1, 2, 2]. Tuple: ordered, immutable — (1, 2). Set: unordered unique — {1, 2}. Dict: key → value — {"Asha": 90}. Draw a 4-row table in your head: order? can change? duplicates or keys?

That table beats a long speech. Example: unique emails → set. Student record → dict. Marks in exam order → list. RGB colour → tuple. Don’t say “they are all collections” and stop.

List vs Set vs Tuple vs Dictionary — output: list keeps two A, tuple keeps two A, set one A, dict key A→1.

Diagram

point = (3, 4)   immutable
     x=3     y=4

Exam tip

Four-row table: order, mutable, duplicates/keys.

Example

# Collections compared
print(["A", "A"])
print(("A", "A"))
print({"A", "A"})
print({"A": 1})

List vs Set vs Tuple vs Dictionary — output: list keeps two A, tuple keeps two A, set one A, dict key A→1.

Short notes

DefList ordered mutable
RuleTuple ordered immutable
RememberSet unique
UseDict key→value

Python · Theory

List vs Set vs Tuple vs Dictionary

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Theory

40/268

List vs Set vs Tuple vs Dictionary

That table beats a long speech. Example: unique emails → set. Student record → dict. Marks in exam order → list. RGB colour → tuple. Don’t say “they are all collections” and stop.

List vs Set vs Tuple vs Dictionary — output: list keeps two A, tuple keeps two A, set one A, dict key A→1.

Diagram

point = (3, 4)   immutable
     x=3     y=4

Exam tip

Four-row table: order, mutable, duplicates/keys.

Example

# Collections compared
print(["A", "A"])
print(("A", "A"))
print({"A", "A"})
print({"A": 1})

List vs Set vs Tuple vs Dictionary — output: list keeps two A, tuple keeps two A, set one A, dict key A→1.

Short notes

DefList ordered mutable
RuleTuple ordered immutable
RememberSet unique
UseDict key→value

List vs Set vs Tuple vs Dictionary

Example

Short notes

Questions

List vs Set vs Tuple vs Dictionary

Example

Short notes

Questions