import re
import locale

def test(pat, s):
    _, enc = locale.getlocale()
    if re.match(pat, s, re.I|re.L):
        print('  %r (%r) matches %r (%r)' %
              (pat, pat.decode(enc), s, s.decode(enc)))
    else:
        print("  %r (%r) doesn't match %r (%r)" %
              (pat, pat.decode(enc), s, s.decode(enc)))

print('locale', locale.setlocale(locale.LC_CTYPE, 'ru_RU.koi8-r'))
test(b'1\xa3', b'1\xb3')
test(b'1\xa3', b'1\xbc')
print('locale', locale.setlocale(locale.LC_CTYPE, 'ru_RU.cp1251'))
test(b'1\xa3', b'1\xb3')
test(b'1\xa3', b'1\xbc')

print('locale', locale.setlocale(locale.LC_CTYPE, 'ru_RU.cp1251'))
test(b'2\xa3', b'2\xb3')
test(b'2\xa3', b'2\xbc')
print('locale', locale.setlocale(locale.LC_CTYPE, 'ru_RU.koi8-r'))
test(b'2\xa3', b'2\xb3')
test(b'2\xa3', b'2\xbc')