# -*- coding: utf-8 -*-
import re
p = re.compile(u'(\d*[.,]?\d+)\s*(?:m\u00B2|qm)')
s = u"wohnung from 71,556m² to 183.4456m²"
print(p.findall(s))
IyAtKi0gY29kaW5nOiB1dGYtOCAtKi0KaW1wb3J0IHJlCnAgPSByZS5jb21waWxlKHUnKFxkKlsuLF0/XGQrKVxzKig/Om1cdTAwQjJ8cW0pJykKcyA9IHUid29obnVuZyBmcm9tIDcxLDU1Nm3CsiB0byAxODMuNDQ1Nm3CsiIKcHJpbnQocC5maW5kYWxsKHMpKQ==