re — 正则表达式

import re
pattern = 'this'
text = 'Does this text match the pattern?'

match = re.search(pattern, text)
s = match.start()
e = match.end()

print('Found "{}"\nin "{}"\nfrom {} to {} ("{}")'.format(match.re.pattern, match.string, s, e, text[s:e]))

Found "this"
in "Does this text match the pattern?"
from 5 to 9 ("this")