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

with pandas it's really easy:

In [78]: d
Out[78]: 
{'match1': {'player1': 57, 'player2': 38},
 'match2': {'player1': 42, 'player3': 9},
 'match3': {'player2': 41, 'player3': 91, 'player4': 63}}

In [79]: pd.DataFrame(d).sum(axis=1).idxmax()
Out[79]: 'player3'

In [80]: pd.DataFrame(d).sum(axis=1).max()
Out[80]: 100.0

First convert it to a DataFrame, then sum over the columns, and find the max :)