Dígito verificador del RUT en Python

rut-flask-restful-validation

# encoding=utf-8
# Idea of a Custom data types for validate the Chilean RUT in Flask-RESTful
# by @lacosox
from itertools import cycle

#rut='XXXXXXXX-X'
def chilean_rut(rut_text):
    rut_text.upper().strip().replace(".", "").replace("K", "10")
    (rut, dv)=rut_text.split('-')

    if rut.isdigit():
        reversed_digits = map(int, reversed(str(rut)))
        factors = cycle(range(2, 8))
        s = sum(d * f for d, f in zip(reversed_digits, factors))
        if  dv <>  str((-s) % 11):
            raise ValueError("Invalid RUT, DV incorrect.")
    else:
        raise ValueError("Invalid RUT, only numbers is valid.")