Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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python

Using try/except block and a for loop

Write a function get_key that takes as input a dictionary with integers as values, and a function.
Evaluate the function on the list of values from the dictionary to obtain a value v. Return the key of the
dictionary that maps to v. If there's more than one key, break ties at random. If there's no such value
in the dictionary, return None.
Examples,
>>> animals =
{'tiger' : 5, 'bat' : 3, 'cow' : 3, 'bear' : 4}
>>> get_key(animals, max)
'tiger'
>>> random. seed(5)
>>> get_key(animals, min)
'cow'
>>> print(get_key(animals, avg))
None
where the function avg is defined as follows:
def avg(x):
return sum(x) / len(x)
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Transcribed Image Text:Write a function get_key that takes as input a dictionary with integers as values, and a function. Evaluate the function on the list of values from the dictionary to obtain a value v. Return the key of the dictionary that maps to v. If there's more than one key, break ties at random. If there's no such value in the dictionary, return None. Examples, >>> animals = {'tiger' : 5, 'bat' : 3, 'cow' : 3, 'bear' : 4} >>> get_key(animals, max) 'tiger' >>> random. seed(5) >>> get_key(animals, min) 'cow' >>> print(get_key(animals, avg)) None where the function avg is defined as follows: def avg(x): return sum(x) / len(x)
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