Store a set in a dictionary's value

[bowlofred]

# a dict value that is a set
d['Cubs'] = set()
# adding members to the set
d['Cubs'].add(1907)
d['Cubs'].add(1908)
d['Cubs'].add(2016)
# display contents of the set
print(d['Cubs'])

This might be a nice place to use a defaultdict. If it defaults to a set, you don't have to create the set for each winner before adding to it.

from collections import defaultdict
d = defaultdict(set)
d['White Sox'].add(1906)
d['Cubs'].add(1907)
print(d['Cubs'])