72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
# vat.py - functions for handling Swiss social security numbers
|
|
#
|
|
# Copyright (C) 2014 Denis Krienbuehl
|
|
#
|
|
# 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
|
|
|
|
"""Swiss social security number ("Sozialversicherungsnummer").
|
|
|
|
Also known as "Neue AHV Nummer".
|
|
|
|
The Swiss Sozialversicherungsnummer is used to identify indivduals for taxation
|
|
and pension purposes.
|
|
|
|
The number is validated using EAN-13, though dashes are substitued for dots.
|
|
|
|
>>> compact('756.9217.0769.85')
|
|
'7569217076985'
|
|
>>> format('7569217076985')
|
|
'756.9217.0769.85'
|
|
>>> validate('7569217076985')
|
|
'7569217076985'
|
|
>>> validate('756.9217.0769.85')
|
|
'7569217076985'
|
|
>>> validate('756.9217.0769.84')
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
"""
|
|
|
|
from stdnum.exceptions import ValidationError
|
|
from stdnum import ean
|
|
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."""
|
|
return clean(number, ' .').strip()
|
|
|
|
|
|
def format(number):
|
|
"""Reformat the passed number to the standard format."""
|
|
number = compact(number)
|
|
return '.'.join((number[:3], number[3:7], number[7:11], number[11:]))
|
|
|
|
|
|
def validate(number):
|
|
"""Checks to see if the number provided is a valid
|
|
Swiss Sozialversicherungsnummer."""
|
|
return ean.validate(compact(number))
|
|
|
|
|
|
def is_valid(number):
|
|
"""Checks to see if the number provided is a valid
|
|
Sozialversicherungsnummer."""
|
|
try:
|
|
return bool(validate(number))
|
|
except ValidationError:
|
|
return False
|