1 def index_words1(text):
 2     result = []
 3     if text:
 4         result.append(0)
 5     for index, letter in enumerate(text):
 6         if letter == ‘ ‘:
 7             result.append(index+1)
 8     return result
 9 
10 
11 def index_words2(text):
12     if text:
13         yield 0
14     for index, letter in enumerate(text):
15         if letter == ‘ ‘:
16             yield index+1
17 
18 
19 if __name__ == ‘__main__‘:
20     hhh = ‘Every dog has its day!‘
21     result = index_words1(hhh)
22     print(‘result1‘, result)
23     result = list(index_words2(hhh))
24     print(‘result2:‘, result)