python :getting the count for the adjectives in a string

Question

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Answer 1

您可以使用 collections.Counter :

>>> from collections import Counter

>>> adjectives = ['awesome', 'amazing', 'awesome']
>>> counts = Counter(adjectives)
>>> counts.items()
[('awesome', 2), ('amazing', 1)]

如果你愿意，可以将其转换为字典:

>>> dict(counts.items())
{'amazing': 1, 'awesome': 2}

或者您可以访问键和值:

>>> for key in counts.keys():
...     print key, counts.get(key)
awesome 2
amazing 1

编辑:

对于列表列表，您需要flatten the lists :

>>> adjectives = [['awesome', 'amazing'], ['good', 'nice' ]]
>>> counts = Counter(adjective
...                  for group in adjectives
...                  for adjective in group)
>>> counts
Counter({'awesome': 1, 'good': 1, 'amazing': 1, 'nice': 1})

或使用 itertools.chain.from_iterable :

>>> from itertools import chain
>>> Counter(chain.from_iterable(adjectives))
Counter({'awesome': 1, 'good': 1, 'amazing': 1, 'nice': 1})