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

I would suggest using Willem Van Onsem answer, but if you don't want to import then here is an alternative.

data = {
    'match1': {
        'player1': 57,
        'player2': 38},
    'match2': {
        'player3': 9,
        'player1': 42},
    'match3': {
        'player2': 41,
        'player4': 63,
        'player3': 91}
    }


def orangecap(data):
    totals = {}
    for d in data.values():
        for k, v in d.items():
            totals[k] = totals.setdefault(k, 0) + v

    return max(totals.items(), key = lambda t:t[1])

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