Who Called? — medium Python for AI problem | Incognition

Who Called?

10 pts · 10 coins

Python for AIMedium

Who Called?

A phone book maps names to phone numbers. You see a number on your screen and want to know who it is.

Write reverse_book(phone_book) that returns a new dictionary that maps each number to its name.

No two people share a number.
An empty phone book gives an empty dictionary.

Examples

phone_book = {'ada': '555-01', 'bo': '555-02'}

returns {'555-01': 'ada', '555-02': 'bo'}

phone_book = {"grace": "900-11", "linus": "900-22", "ada": "900-33"}

returns {'900-11': 'grace', '900-22': 'linus', '900-33': 'ada'}

phone_book = {}

returns {}

Hints

solution.py

1def reverse_book(phone_book):
2    # your code here
3    pass
4