gregmarra/the-blue-alliance — pull request #974 by legoktm (2014-04-14 04:47:02+00:00)
Title: Insights: Use collections.defaultdict

A lot of code right now is in the pattern of:

if foo in bar:
bar[foo] += 1
else:
bar[foo] = 1

This can easily be simplified with defaultdict, which was specifically
designed for this very purpose.