Is there a way to make collections.Counter (Python2.7) aware that its input list is sorted?

Question

The Problem

I\'ve been playing around with different ways (in Python 2.7) to extract a list of (word, frequency) tuples from a corpus, or list of strings, and comp

Answer 1

Given a sorted list of words as you mention, have you tried the traditional Pythonic approach of itertools.groupby?

from itertools import groupby
some_data = ['a', 'a', 'b', 'c', 'c', 'c']
count = dict( (k, sum(1 for i in v)) for k, v in groupby(some_data) ) # or
count = {k:sum(1 for i in v) for k, v in groupby(some_data)}
# {'a': 2, 'c': 3, 'b': 1}