Find the occurrence and position of the substring

for match in re.finditer(p, S)

Find the occurrence and position of the

substrings within a string.

import re

S = 'Python exercises, PHP exercises, C# exercises'
pattern = 'exercises'

for match in re.finditer(pattern, S):
    s = match.start()
    e = match.end()
    print('Found "%s" at %d:%d' % (text[s:e], s, e))

Output:

Found "exercises" at 7:16
Found "exercises" at 22:31
Found "exercises" at 36:45

See also

https://www.w3resource.com/python-exercises/re/python-re-exercise-22.php