Given a list of dictionaries, how can I eliminate duplicates of one key, and sort by another

Question

I\'m working with a list of dict objects that looks like this (the order of the objects differs):

[
    {\'name\': \'Foo\', \'score         


        

Answer 1

In case you haven't heard of group by, this is nice use of it:

from itertools import groupby

data=[
    {'name': 'Foo', 'score': 1},
    {'name': 'Bar', 'score': 2},
    {'name': 'Foo', 'score': 3},
    {'name': 'Bar', 'score': 3},
    {'name': 'Foo', 'score': 2},
    {'name': 'Baz', 'score': 2},
    {'name': 'Baz', 'score': 1},
    {'name': 'Bar', 'score': 1}
]

keyfunc=lambda d:d['name']
data.sort(key=keyfunc)

ans=[]
for k, g in groupby(data, keyfunc):
    ans.append({k:max((d['score'] for d in g))})
print ans

>>>
[{'Bar': 3}, {'Baz': 2}, {'Foo': 3}]