92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
|
# rut.py - functions for handling Chile RUT/RUN numbers
|
||
|
|
# coding: utf-8
|
||
|
|
#
|
||
|
|
# Copyright (C) 2008-2011 Cédric Krier
|
||
|
|
# Copyright (C) 2008-2011 B2CK
|
||
|
|
# Copyright (C) 2015 Arthur de Jong
|
||
|
|
#
|
||
|
|
# This library is free software; you can redistribute it and/or
|
||
|
|
# modify it under the terms of the GNU Lesser General Public
|
||
|
|
# License as published by the Free Software Foundation; either
|
||
|
|
# version 2.1 of the License, or (at your option) any later version.
|
||
|
|
#
|
||
|
|
# This library is distributed in the hope that it will be useful,
|
||
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
# Lesser General Public License for more details.
|
||
|
|
#
|
||
|
|
# You should have received a copy of the GNU Lesser General Public
|
||
|
|
# License along with this library; if not, write to the Free Software
|
||
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||
|
|
# 02110-1301 USA
|
||
|
|
|
||
|
|
"""RUT (Rol Único Tributario, Chilean national tax number).
|
||
|
|
|
||
|
|
The RUT, the Chilean national tax number is the same as the RUN (Rol Único
|
||
|
|
Nacional) the Chilean national identification number. The number consists of
|
||
|
|
8 digits, followed by a check digit.
|
||
|
|
|
||
|
|
>>> validate('76086428-5')
|
||
|
|
'760864285'
|
||
|
|
>>> validate('CL 12531909-2')
|
||
|
|
'125319092'
|
||
|
|
>>> validate('12531909-3')
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
InvalidChecksum: ...
|
||
|
|
>>> validate('76086A28-5')
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
InvalidFormat: ...
|
||
|
|
>>> format('125319092')
|
||
|
|
'12.531.909-2'
|
||
|
|
"""
|
||
|
|
|
||
|
|
from stdnum.exceptions import *
|
||
|
|
from stdnum.util import clean
|
||
|
|
|
||
|
|
|
||
|
|
def compact(number):
|
||
|
|
"""Convert the number to the minimal representation. This strips the
|
||
|
|
number of any valid separators and removes surrounding whitespace."""
|
||
|
|
number = clean(number, ' -.').upper().strip()
|
||
|
|
if number.startswith('CL'):
|
||
|
|
number = number[2:]
|
||
|
|
return number
|
||
|
|
|
||
|
|
|
||
|
|
def calc_check_digit(number):
|
||
|
|
"""Calculate the check digit. The number passed should not have the
|
||
|
|
check digit included."""
|
||
|
|
s = sum(int(n) * (4 + (5 - i) % 6) for i, n in enumerate(number[::-1]))
|
||
|
|
return '0123456789K'[s % 11]
|
||
|
|
|
||
|
|
|
||
|
|
def validate(number):
|
||
|
|
"""Checks to see if the number provided is a valid number. This
|
||
|
|
checks the length, formatting and check digit."""
|
||
|
|
number = compact(number)
|
||
|
|
if len(number) not in (8, 9):
|
||
|
|
raise InvalidLength()
|
||
|
|
if not number[:-1].isdigit():
|
||
|
|
raise InvalidFormat()
|
||
|
|
if number[-1] != calc_check_digit(number[:-1]):
|
||
|
|
raise InvalidChecksum()
|
||
|
|
return number
|
||
|
|
|
||
|
|
|
||
|
|
def is_valid(number):
|
||
|
|
"""Checks to see if the number provided is a valid number. This
|
||
|
|
checks the length, formatting and check digit."""
|
||
|
|
try:
|
||
|
|
return bool(validate(number))
|
||
|
|
except ValidationError:
|
||
|
|
return False
|
||
|
|
|
||
|
|
|
||
|
|
def format(number):
|
||
|
|
"""Reformat the passed number to the standard format."""
|
||
|
|
number = compact(number)
|
||
|
|
return (number[:-7] + '.' + number[-7:-4] + '.' +
|
||
|
|
number[-4:-1] + '-' + number[-1])
|