CODEWITHSUNDEEP
pythondictionarypython-3.6
ICookixz
ICookixz

Reputation: 21

How do I print the top values in my dictionary

I am a computer science student and for my GCSE course we need to complete a NEA course.

I chose the task where we make a dice game and I am stuck on a bit where I sort a dictionary into the top 5 scores.

My code reads a leaderboards.txt and converts it to a dictionary. Below is Leaderboard.txt

12 p2
13 p1
1412 p5
34 p3
213 p6
9 p4

And now I cant find anywhere which tells me how I can sort a dictionary by the top values. Below is my code

highscores={}
with open("Leaderboard.txt") as f:
    for line in f:
        (key,val) = line.split(" ")
        highscores[int(key)] = val

How can I print top 5 values in the dict? Thanks

Upvotes: 1

Views: 287

Answers (3)

Sayandip Dutta
Sayandip Dutta

Reputation: 15872

Here's a solution:

from collections import Counter  

dct = {'p2':12,'p1':13,'p5':1412,'p3':34,'p6':213,'p4':9}
print(Counter(dct).most_common(5))

Output:

[('p5', 1412), ('p6', 213), ('p3', 34), ('p1', 13), ('p2', 12)]

Upvotes: 0

Sayse
Sayse

Reputation: 43320

In python 3.6, dictionaries are ordered by insertion order, so you need to extract all the keys and values, reorder them and then stick them in a new dictionary (limiting it to 5 entries whilst your at it)

original_dict = {
    12: 'p2',
    13: 'p1',
    1412: 'p5',
    34: 'p3',
    213: 'p6',
    9: 'p4'
}

sorted_items = sorted(original_dict.items(), key=lambda x: -x[0])

print({k: v for k, v in sorted_items[:5]})

{1412: 'p5', 213: 'p6', 34: 'p3', 13: 'p1', 12: 'p2'}

Upvotes: 2

Kemp
Kemp

Reputation: 3649

In order to sort the dictionary you would have to convert it to a type that can be sorted, such as a list. Alternatively, unless you have a particular need to use a dictionary, I would read the scores into a list to start with. That's a more suitable type for what you're attempting to do.

Upvotes: 0

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