How to operate on nested dictionary in python 3.x?

Question

I am stuck with this question, can you solve the challenge? Here we go!

We represent scores of players across a sequence of matches in a two level dictionary as follows:

Answer 1

You can easily use a running counter to count the scores first:

from collections import Counter

def orangecap(d):
    total = Counter()
    for match_result in d.values():
        total.update(match_result)
    return total.most_common(1)[0]

Here Counter.update(iterable) will increment the counters for the players mentioned. Counter.most_common(n) specifies we want the first most common element. This will return a list and we pick the first tuple.

>>> orangecap(d)
('player3', 100)