Question

How to get the starting index for all occurrences of a substring in a string with Python

Answer 1

s = 'abcdabcdefgabaab'
  
sub = 'ab'

lst = [] 

lst = [i for i in range(len(s)) if s.startswith(sub, i)] 
  
print(lst) 


        
'''
run:
 
[0, 4, 11, 14]
        
'''

 

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Answer 2

import re 

s = 'abcdabcdefgabaab'
  
sub = 'ab'

lst = [] 

lst = [i.start() for i in re.finditer(sub, s)]
  
print(lst) 


        
'''
run:
 
[0, 4, 11, 14]
        
'''

 

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