题目链接：2047. 句子中的有效单词数
如题，用正则表达式描述题中所给规则即可。
import re
class Solution:
def countValidWords(self, sentence: str) -> int:
return sum(re.fullmatch(r'([a-z]+(-[a-z]+)?)?[!.,]?', word) is not None for word in sentence.split())
题目链接：2047. 句子中的有效单词数
如题，用正则表达式描述题中所给规则即可。
import re
class Solution:
def countValidWords(self, sentence: str) -> int:
return sum(re.fullmatch(r'([a-z]+(-[a-z]+)?)?[!.,]?', word) is not None for word in sentence.split())