repeated_substring.py

>>> text_data_test = "Life is what life happens when you're busy life making other life plans."
>>> index_list = []
>>> flag = 0
>>> count = 0
>>> word_length = len('life')
>>> while 'life' in text_data_test:
...     return_index = text_data_test.lower().find('life')
...     print(return_index)
...     if return_index == -1:
...             break
...     if len(index_list) == 0:
...             index_list.append(return_index)
...     else:
...             index_list.append(return_index + word_length * count)
...     text_data_test = text_data_test.lower().replace('life',"",1)
...     print(text_data_test)
...     count += 1
... 
0
 is what life happens when you're busy life making other life plans.
9
 is what  happens when you're busy life making other life plans.
35
 is what  happens when you're busy  making other life plans.
49
 is what  happens when you're busy  making other  plans.