# onderwijsnummer.py - functions for handling onderwijsnummers # # 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 """Onderwijsnummer (Dutch school number). The onderwijsnummers (school number) is very similar to the BSN (Dutch national identification number) but for students without a BSN. It uses a small variation of the BSN checksum. >>> validate('1012.22.331') '101222331' >>> validate('100252333') Traceback (most recent call last): ... InvalidChecksum: ... >>> validate('1012.22.3333') Traceback (most recent call last): ... InvalidLength: ... >>> validate('2112.22.337') # number must start with 10 Traceback (most recent call last): ... InvalidFormat: ... """ from stdnum.exceptions import * from stdnum.nl.bsn import compact, checksum __all__ = ['compact', 'validate', 'is_valid'] def validate(number): """Checks to see if the number provided is a valid onderwijsnummer. This checks the length and whether the check digit is correct and whether it starts with the right sequence.""" number = compact(number) if not number.isdigit() or int(number) <= 0: raise InvalidFormat() if not number.startswith('10'): raise InvalidFormat() if len(number) != 9: raise InvalidLength() if checksum(number) != 5: raise InvalidChecksum() return number def is_valid(number): """Checks to see if the number provided is a valid onderwijsnummer. This checks the length and whether the check digit is correct and whether it starts with the right sequence.""" try: return bool(validate(number)) except ValidationError: return False