For this problem, you are given a mostly-working version of the Friend and FriendsDB classes from hw6 and hw7, and we will add new method to FriendsDB -- group friends_by_food. group_friends_by_food returns a dictionary mapping from each of the favorite foods enjoyed by any friend to a list of the friends who enjoy that food, sorted in alphabetical order. (You can use the friends_who_love method to generate these lists.) A sample run should look like this: >>> friend1 = Friend ("sarah", 165) >>> friend1.add_favorite_food("strawberries") >>> friend2 - Friend("dweezil", 175) >>> friend2.add_favorite_food ("pizza") >>> friend3 = Friend("bimmy", 60) >>> friend3.add favorite_food("pizza") >>> friend3.add favorite_food ("strawberries") >>> db = FriendsDB() >>> db.add friend(friend1) >>> db.add_friend(friend2) >>> db.add friend(friend3) >>> db.group_friends by_food() {'strawberries': ['bimmy', 'sarah'], 'pizza': ['bimmy', 'dweezil']}

For this problem, you are given a mostly-working version of the Friend and FriendsDB classes from hw6 and hw7, and we will add new method to FriendsDB -- group friends_by_food. group_friends_by_food returns a dictionary mapping from each of the favorite foods enjoyed by any friend to a list of the friends who enjoy that food, sorted in alphabetical order. (You can use the friends_who_love method to generate these lists.) A sample run should look like this: >>> friend1 = Friend ("sarah", 165) >>> friend1.add_favorite_food("strawberries") >>> friend2 - Friend("dweezil", 175) >>> friend2.add_favorite_food ("pizza") >>> friend3 = Friend("bimmy", 60) >>> friend3.add favorite_food("pizza") >>> friend3.add favorite_food ("strawberries") >>> db = FriendsDB() >>> db.add friend(friend1) >>> db.add_friend(friend2) >>> db.add friend(friend3) >>> db.group_friends by_food() {'strawberries': ['bimmy', 'sarah'], 'pizza': ['bimmy', 'dweezil']}

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

7. group_friends_by_food
For this problem, you are given a mostly-working version of the Friend and FriendsDB classes from hw6 and hw7, and
we will add new method to FriendsDB -- group_friends_by_food. group_friends_by_food returns a dictionary mapping
from each of the favorite foods enjoyed by any friend to a list of the friends who enjoy that food, sorted in alphabetical
order. (You can use the friends_who_love method to generate these lists.)
A sample run should look like this:
|>>> friend1 = Friend ("sarah", 165)
>>> friend1.add_favorite_food ("strawberries")
>>> friend2 - Friend ("dweezil", 175)
>>> friend2.add_favorite_food("pizza")
>>> friend3 = Friend("bimmy", 60)
>>> friend3.add_favorite_food("pizza")
>>> friend3.add_favorite_food("strawberries")
>>> db = FriendsDB()
>>> db.add friend (friend1)
>>> db.add_friend(friend2)
>>> db.add friend(friend3)
>>> db.group_friends_by_food()
{'strawberries': ['bimmy', 'sarah'], 'pizza': [' bimmy', 'dweezil']}

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7. group_friends_by_food For this problem, you are given a mostly-working version of the Friend and FriendsDB classes from hw6 and hw7, and we will add new method to FriendsDB -- group_friends_by_food. group_friends_by_food returns a dictionary mapping from each of the favorite foods enjoyed by any friend to a list of the friends who enjoy that food, sorted in alphabetical order. (You can use the friends_who_love method to generate these lists.) A sample run should look like this: >>> friend1 = Friend("sarah", 165) >>> friend1.add favorite_food("strawberries") >>> friend2 Friend("dweezil", 175) >>> friend2.add_favorite_food("pizza") >>> friend3 Friend("bimmy", 60) >>> friend3.add_favorite_food("pizza") >>> friend3.add favorite_food ("strawberries") >>> db FriendsDB() %3D >>> db.add_ friend(friend1) >>> db.add_friend(friend2) >>> b.add_friend (friend3) >>> db.group_friends_by_food() {'strawberries': ['bimmy', 'sarah'], 'pizza': ['bimmy', 'dweezil']}