Question

Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression d[“susan”]?

(a) Since “susan” is not a value in the set, Python raises a KeyError exception

(b) It is executed fine and no exception is raised, and it returns None

(c) Since “susan” is not a key in the set, Python raises a KeyError exception

(d) Since “susan” is not a key in the set, Python raises a syntax error

I had been asked this question during an online exam.

My query is from Dictionary in chapter Dictionary, Functions and Built-in Functions of Python

Answer 1

Correct choice is (c) Since “susan” is not a key in the set, Python raises a KeyError exception

Easiest explanation - Execute in the shell to verify.