Python · Theory

dict.keys()

Theory

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dict.keys() works on a dictionary — labelled data like marks["Asha"] = 90. Keys map to values. Loop with .items() when you need both.

dict.keys() — output — ['Asha', 'Ravi'].

Trap for dict.keys() — writing d[missing] in a viva. Prefer get when the key might not exist.

Diagram

{ "Asha": 90, "Ravi": 85 }
         │           │
        key        value

Exam tip

get vs [] — one sentence + tiny dict of marks.

# dict.keys()
print(list({"Asha": 90, "Ravi": 85}.keys()))

dict.keys() — output: ['Asha', 'Ravi'].