13. While dictionaries are designed so that we can find a value based on a key, every so often we need to perform a reverse lookup. For example, imagine a dictionary where the keys are names and the values are phone numbers. Usually we want to find the phone number based on the name, but occasionally you might need to find a name based on the phone number. Write a function called reverse_lookup(dictionary, value) that returns all the keys in the dictionary associated with the specified value. Note: In dictionaries, the keys are guaranteed to be unique, but the values are not. So your function should return a list containing all of the matching keys (if any) Example: Given this dictionary, groups = {'Apple': 'Fruit', 'Spinach: "Vegetable'. 'Banana': 'Fruit'} reverse_lookup (groups. Vegetable') ["Spinach'] reverse_lookup (groups, Fruit') ['Apple'. Banana'] reverse_lookup (groups. 'Meat') []
13. While dictionaries are designed so that we can find a value based on a key, every so often we need to perform a reverse lookup. For example, imagine a dictionary where the keys are names and the values are phone numbers. Usually we want to find the phone number based on the name, but occasionally you might need to find a name based on the phone number. Write a function called reverse_lookup(dictionary, value) that returns all the keys in the dictionary associated with the specified value. Note: In dictionaries, the keys are guaranteed to be unique, but the values are not. So your function should return a list containing all of the matching keys (if any) Example: Given this dictionary, groups = {'Apple': 'Fruit', 'Spinach: "Vegetable'. 'Banana': 'Fruit'} reverse_lookup (groups. Vegetable') ["Spinach'] reverse_lookup (groups, Fruit') ['Apple'. Banana'] reverse_lookup (groups. 'Meat') []
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
![13.
While dictionaries are designed so that we can find a value based on a key, every so often
we need to perform a reverse lookup.
For example, imagine a dictionary where the keys are names and the values are phone numbers.
Usually we want to find the phone number based on the name, but occasionally you might need to
find a name based on the phone number.
Write a function called reverse_lookup(dictionary, value) that returns all the keys in the dictionary
associated with the specified value.
Note: In dictionaries, the keys are guaranteed to be unique, but the values are not. So your function
should return a list containing all of the matching keys (if any)
Example: Given this dictionary,
groups = {'Apple': 'Fruit', 'Spinach': 'Vegetable', 'Banana': 'Fruit'}
reverse_lookup (groups. Vegetable')
["Spinach']
reverse_lookup (groups, Fruit')
['Apple'. 'Banana']
reverse_lookup (groups. 'Meat')
[]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe44c0c63-29c1-4607-8817-e55ffea125cb%2Fd074d783-6886-4c47-9073-89f25e9d4adb%2Fim3drcs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:13.
While dictionaries are designed so that we can find a value based on a key, every so often
we need to perform a reverse lookup.
For example, imagine a dictionary where the keys are names and the values are phone numbers.
Usually we want to find the phone number based on the name, but occasionally you might need to
find a name based on the phone number.
Write a function called reverse_lookup(dictionary, value) that returns all the keys in the dictionary
associated with the specified value.
Note: In dictionaries, the keys are guaranteed to be unique, but the values are not. So your function
should return a list containing all of the matching keys (if any)
Example: Given this dictionary,
groups = {'Apple': 'Fruit', 'Spinach': 'Vegetable', 'Banana': 'Fruit'}
reverse_lookup (groups. Vegetable')
["Spinach']
reverse_lookup (groups, Fruit')
['Apple'. 'Banana']
reverse_lookup (groups. 'Meat')
[]
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 2 images
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY