python - 如何将字符串转换成字典，并统计每个单词的个数

Question

我只是想知道我将如何转换一个字符串，例如“hello there hi there”，并将它变成一个字典，然后使用这个字典，我想计算字典中每个单词的数量，并返回它按字母顺序排列。所以在这种情况下它会返回:

[('hello', 1), ('hi', 1), ('there', 2)]

任何帮助将不胜感激

Answer 1

>>> from collections import Counter
>>> text = "hello there hi there"
>>> sorted(Counter(text.split()).items())
[('hello', 1), ('hi', 1), ('there', 2)]

class collections.Counter([iterable-or-mapping])

A Counter is a dict subclass for counting hashable objects. It is an unordered collection where elements are stored as dictionary keys and their counts are stored as dictionary values. Counts are allowed to be any integer value including zero or negative counts. The Counter class is similar to bags or multisets in other languages.