如何查找字符串中所有出现的单词的所有索引[重复]

Question

这是我的代码：

sentence = input("Give me a sentence ")

word = input("What word would you like to find ")


sentence_split = sentence.split()


if word in sentence_split:
   print("have found",word,)
   print("The word comes in the position" )
else:
   print("error have not found",word)

wordfound = (sentence_split.index(word)+1)

print(wordfound)

我能够获取字符串中单词第一次出现的索引。我怎样才能获得所有的出现？

Answer 1

使用re.finditer:

import re
sentence = input("Give me a sentence ")
word = input("What word would you like to find ")
for match in re.finditer(word, sentence):
    print (match.start(), match.end())

对于word = "this" 和sentence = "this is a sentence this this"，这将产生输出：

(0, 4)
(19, 23)
(24, 28)