Python: regular expression (re) Ignore Case

Informar a flag re.IGNORECASE para as rotinas search, match, e sub:
import re

data='''1 - test
2 - Test
3 - teSt
4 - tesT
5 - cuscuTestes
6 - None
7 - Void
8 - truncus
9 - TESTE
0 - TEST
'''


re.search('test', data, re.IGNORECASE)
re.match('teste', data, re.IGNORECASE)
re.sub('testes', 'xxx', data, flags=re.IGNORECASE)