77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
# nie.py - functions for handling Spanish foreigner identity codes
|
|
# coding: utf-8
|
|
#
|
|
# Copyright (C) 2012, 2013 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
|
|
|
|
"""NIE (Número de Identificación de Extranjeros, Spanish foreigner number).
|
|
|
|
The NIE is an identification number for foreigners. It is a 9 digit number
|
|
where the first digit is either X, Y or Z and last digit is a checksum
|
|
letter.
|
|
|
|
>>> validate('x-2482300w')
|
|
'X2482300W'
|
|
>>> validate('x-2482300a') # invalid check digit
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
>>> validate('X2482300') # digit missing
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidLength: ...
|
|
"""
|
|
|
|
from stdnum.es import dni
|
|
from stdnum.exceptions import *
|
|
|
|
|
|
__all__ = ['compact', 'is_valid']
|
|
|
|
|
|
# use the same compact function as DNI
|
|
compact = dni.compact
|
|
|
|
|
|
def calc_check_digit(number):
|
|
"""Calculate the check digit. The number passed should not have the
|
|
check digit included."""
|
|
# replace XYZ with 012
|
|
number = str('XYZ'.index(number[0])) + number[1:]
|
|
return dni.calc_check_digit(number)
|
|
|
|
|
|
def validate(number):
|
|
"""Checks to see if the number provided is a valid NIE. This checks
|
|
the length, formatting and check digit."""
|
|
number = compact(number)
|
|
if not number[1:-1].isdigit() or number[:1] not in 'XYZ':
|
|
raise InvalidFormat()
|
|
if len(number) != 9:
|
|
raise InvalidLength()
|
|
if calc_check_digit(number[:-1]) != number[-1]:
|
|
raise InvalidChecksum()
|
|
return number
|
|
|
|
|
|
def is_valid(number):
|
|
"""Checks to see if the number provided is a valid NIE. This checks
|
|
the length, formatting and check digit."""
|
|
try:
|
|
return bool(validate(number))
|
|
except ValidationError:
|
|
return False
|