>>> import collections>>> # Tally occurrences of words in a list>>> cnt = collections.Counter()>>> for word in ['red', 'blue', 'red', 'green', 'blue', 'blue']:...     cnt[word] += 1>>> cntCounter({
    'blue': 3, 'red': 2, 'green': 1})>>> c = collections.Counter('helloworld')>>> cCounter({
    'l': 3, 'o': 2, 'e': 1, 'd': 1, 'h': 1, 'r': 1, 'w': 1})>>> c.most_common(3)[('l', 3), ('o', 2), ('e', 1)]