1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
# dni.py - functions for handling Spanish personal 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
"""DNI (Documento Nacional de Identidad, Spanish personal identity codes).
The DNI is a 9 digit number used to identify Spanish citizens. The last
digit is a checksum letter.
Foreign nationals, since 2010 are issued an NIE (Número de Identificación
de Extranjeros, Foreigner's Identity Number) instead.
>>> validate('54362315-K')
'54362315K'
>>> validate('54362315Z') # invalid check digit
Traceback (most recent call last):
...
InvalidChecksum: ...
>>> validate('54362315') # digit missing
Traceback (most recent call last):
...
InvalidLength: ...
"""
from stdnum.exceptions import *
from stdnum.util import clean, isdigits
def compact(number):
"""Convert the number to the minimal representation. This strips the
number of any valid separators and removes surrounding whitespace."""
return clean(number, ' -').upper().strip()
def calc_check_digit(number):
"""Calculate the check digit. The number passed should not have the
check digit included."""
return 'TRWAGMYFPDXBNJZSQVHLCKE'[int(number) % 23]
def validate(number):
"""Check if the number provided is a valid DNI number. This checks the
length, formatting and check digit."""
number = compact(number)
if not isdigits(number[:-1]):
raise InvalidFormat()
if len(number) != 9:
raise InvalidLength()
if calc_check_digit(number[:-1]) != number[-1]:
raise InvalidChecksum()
return number
def is_valid(number):
"""Check if the number provided is a valid DNI number. This checks the
length, formatting and check digit."""
try:
return bool(validate(number))
except ValidationError:
return False
|