How do I print the top values in my dictionary

Question

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

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

I can do that but the thing is how can I print the top 5 scores? — ICookixz, Nov 15 '19 at 10:22
Take a look at https://stackoverflow.com/questions/9001509/how-can-i-sort-a-dictionary-by-key — Encrypted, Nov 15 '19 at 10:22
Does this answer your question? [How do I sort a dictionary by value?](https://stackoverflow.com/questions/613183/how-do-i-sort-a-dictionary-by-value) — YellowAfterlife, Nov 15 '19 at 10:28

Sayse · Accepted Answer · 2019-11-15T10:28:33.003

2

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'}

edited Nov 15 '19 at 10:28

answered Nov 15 '19 at 10:25

Sayse

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good answer, i would just add that for the users data they read data from a file so they will have string data so they will need to wrap `x[0]` as `int(x[0])` to be sure to sort score numerically. – Chris Doyle Nov 15 '19 at 10:27
@ChrisDoyle - Thats true although the op already does that in their question – Sayse Nov 15 '19 at 10:29
Thanks it works, do you know how I can print it so that when it is printed, It is in a better format? – ICookixz Nov 15 '19 at 10:30
@ICookixz - You need to iterate over the items in your output dictionary and then format them however you like – Sayse Nov 15 '19 at 10:31
1

@Sayse ah ok it seems someone has edited the OP question changing int() to str() for some reason on the dict key. I have updated the OP question to use int() again as it orignally did. – Chris Doyle Nov 15 '19 at 11:30
How can I do that? @Sayse – ICookixz Nov 15 '19 at 12:00

Sayandip Dutta · Answer 2 · 2019-11-15T10:37:11.307

0

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)]

edited Nov 15 '19 at 10:37

answered Nov 15 '19 at 10:26

Sayandip Dutta

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score 0 · Answer 3 · answered Nov 15 '19 at 10:26

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.

How do I print the top values in my dictionary

3 Answers3