How to group same Dictionary values together in Python and Count the Value?

Question

How do you print a dictionary in Python where if the value matches another value in the dictionary, they are printed on the same line?

Code:

result = {'light':4,'plane':4, 'vehicle':5}

print(result)

Current Output:

{'light': 4, 'plane': 4, 'vehicle': 5}

Expected Output:

4 light, plane
5 vehicle

How would you also count the frequency of the words as in the expected output? For example, light + plane is 2.

f.e. this answer https://stackoverflow.com/a/485368/7505395 from the dupe (there are some handling grouping for multiple values) — Patrick Artner, May 23 '18 at 05:29

score 1 · Accepted Answer · edited May 23 '18 at 06:05

1

You can try like this :

from collections import defaultdict

v = defaultdict(list)
d = {'light':4,'plane':4, 'vehicle':5}

for key, value in sorted(d.items()):
    v[value].append(key)

This will also work :

k = {}

for key, value in sorted(d.items()):
    k.setdefault(value, []).append(key)

UPDATE : If you want to print it in your desired format :

for i, j in v.items():
    print(i,", ".join(l for l in j))

O/P will be like :

4 light, plane
5 vehicle

UPDATE 2: The code to print in the desired format mentioned above is completed below:

from collections import defaultdict
v = defaultdict(list)
d = {'light':4,'plane':4, 'vehicle':5}
for key, value in sorted(d.items()):
    v[value].append(key)
for i, j in v.items():
    print(i,", ".join(l for l in j))

edited May 23 '18 at 06:05

Dave

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answered May 23 '18 at 05:24

Vikas Periyadath

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How would I count the total of all words? – Dave May 23 '18 at 06:21
what you mean by total of all words ? for a list you can use len – Vikas Periyadath May 23 '18 at 06:23
For example, I want to break the code when a certain amount of words is met. Vehicle, light and plane = a total of 3 words. – Dave May 23 '18 at 06:24
1

if you want the total of all words from main dict you can use `len(d.keys())` – Vikas Periyadath May 23 '18 at 06:26

How to group same Dictionary values together in Python and Count the Value?

1 Answers1