Update Values in Nested Dictionary According to Nested Key - nested

Question

I have the following Structures:
MyDict = {'Team1': {'John' : 0, 'Mary' : 0},
'Team2': {'Steven' : 0, 'Gwen' : 0,'Fred' : 0},
'Team3': {'Louise' : 0, 'Alice' : 0, 'Jim' : 0},
'Team4': {'Paul' : 0, 'George' : 0},
'Team5': {'Tracey' : 0}}
MyList = ['John', 'Gwen', 'Jim', 'George', 'John', 'Gwen', 'Alice', 'Frank', 'John', 'Gwen', 'Frank', 'John', 'Gwen', 'Tracey']
The first is a nested structure with members in specific teams.
For each occurrence of the member in MyList, I need that value updated in MyDict.
Once complete, I need the printed total for each team.
So after iterating through MyList, the nested structure will look like this:
MyDict = {'Team1': {'John' : 4, 'Mary' : 0},
'Team2': {'Steven' : 0, 'Gwen' : 4,'Fred' : 0},
'Team3': {'Louise' : 0, 'Alice' : 1, 'Jim' : 1},
'Team4': {'Paul' : 0, 'George' : 1},
'Team5': {'Tracey' : 1}}
And the printed totals will look like this:
Team1: 4
Team2: 4
Team3: 2
Team4: 1
Team5: 1

Answer 1

use code below:
MyDict = {'Team1': {'John' : 0, 'Mary' : 0},
'Team2': {'Steven' : 0, 'Gwen' : 0,'Fred' : 0},
'Team3': {'Louise' : 0, 'Alice' : 0, 'Jim' : 0},
'Team4': {'Paul' : 0, 'George' : 0},
'Team5': {'Tracey' : 0}}
MyList = ['John', 'Gwen', 'Jim', 'George', 'John', 'Gwen', 'Alice', 'Frank', 'John', 'Gwen', 'Frank', 'John', 'Gwen', 'Tracey']
for name in MyList:
for key,val in MyDict.items():
if name in val:
val[name]+=1
for key,val in MyDict.items():
print(key,':',sum(val.values()))
have fun :)