统计一句话中单词的数量。可以直接使用collecitons中的Counter。稍微麻烦的是句子需要parse一下。我试着用正规表达式，不过没法全部做到处理全部规则。等通过后看看有没有其他人可以做到。 from collections import Counter import re def count_words(sentence): words = re.findall(r"([\w]+'*[\w]*)+\b", sentence.replace("_", " ").lower()) return dict(Counter(words)) Updated: 19/08/2020 刚看了导师的评论，推荐不用re和dict Counter。直接写parser还有点费劲，要考虑到不同的case。 import re class Counter: def __init__(self): self.__counter = {} def count(self, word): self.__counter.setdefault(word, 0) self.__counter[word] += 1 @property def data(self): return self.__counter def count_words(sentence): #words = sentence.lower().replace(",", " ").replace(".", " ").split(" ") counter = Counter() word = "" start_word = False quote_level = 0 escape = False for c in sentence: if escape: escape = False
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