adding values of dictionaries in python

Question

I want to add the score of individual players and want to display the most runs scored by the player. This is the example of dictionaries that i am referring:

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

I tried many solutions but unable to make a logic so that it will add the scores of individual players from different matches. Any help will be appreciable. Thanks in advance.

Answer 1

Iterate over the nested dictionary and add up scores to a dictionary of player totals.

def find_totals(d):
    total = {}
    for match, results in d.items():
        for player, score in results.items():
            total[player] = total.get(player, 0) + score
    return total

Sample Output

>>> d = {'match1':{'player1':57, 'player2':38}, 'match2':{'player3':9, 'player1':42}, 'match3':{'player2':41, 'player4':63, 'player3':91}}
>>> print find_totals(d)
{'player2': 79, 'player3': 100, 'player1': 99, 'player4': 63}