CODEWITHSUNDEEP
pythondictionaryfrequency
user4307103
user4307103

Reputation:

How do you find which value occurs the most in a dictionary?

In a dictionary with keys and a list of values, how do you find which value is in the lists of values most frequently? I'm assuming you use for loops and append to lists but am unsure of how to do so. Also I want to print the value which is occurring most frequently?

Thank you!

Please keep in mind I'm very new to programming and am not familiar with lambda or other complicated ways to solve this.

Upvotes: 1

Views: 120

Answers (2)

chapelo
chapelo

Reputation: 2562

Sorting the dictionary by value should do it:

d = {'a': 5, 'b': 3, 'c': 5, 'd': 1, 'e': 5}

print(d[sorted(d, key=lambda k: d[k])[-1]])

Cyber is right, the above gets the largest value. See below to get the most frequent. My idea is to get the value without using the collections.Counter.

counts = {}
for k in d:
    counts[d[k]] = counts.get(d[k], 0) + 1


print(sorted(counts)[-1])   # 5
print(counts)               # {1: 1, 3: 1, 5: 3}

Upvotes: 0

Cory Kramer
Cory Kramer

Reputation: 117856

One way to do so would be to use collections.Counter

from collections import Counter

>>> d = {'a': 5, 'b': 3, 'c': 5, 'd': 1, 'e': 5}
>>> c = Counter(d.values())
>>> c
[(5, 3), (1, 1), (3, 1)]

>>> c.most_common()[0]
(5, 3)   # this is the value, and number of appearances

Upvotes: 5

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