题解 | #单词倒排#
单词倒排
https://www.nowcoder.com/practice/81544a4989df4109b33c2d65037c5836
思路一: 使用正则表达式找到所有单词, reverse, 符合长度条件输出
##
import re
x = input()
words = re.findall(r"[a-zA-Z]+",x)
words.reverse()
length = []
for i in words:
length.append(len(i))
if min(length)<=20 and len(x) in range(1,10001):
print(" ".join(words))
思路二:
x = input()
for i in range(len(x)):
if not x[i].isalpha(): # 寻找str里面不为字母的元素
x = x.replace(x[i], " ") # 用空格替代
sentence_list = x.split(" ") # 将所有单词存放到list中
sentence_list.reverse() # reverse list
print(" ".join(sentence_list))
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