95 lines
3.1 KiB
Python
95 lines
3.1 KiB
Python
# pesel.py - functions for handling REGON numbers
|
|
# coding: utf-8
|
|
#
|
|
# Copyright (C) 2015 Dariusz Choruzy
|
|
# 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
|
|
|
|
"""REGON (Rejestr Gospodarki Narodowej, Polish register of economic units).
|
|
|
|
The REGON (Rejestr Gospodarki Narodowej) is a statistical identification
|
|
number for businesses. National entities are assigned a 9-digit number, while
|
|
local units append 5 digits to form a 14-digit number.
|
|
|
|
More information can be found at:
|
|
http://bip.stat.gov.pl/en/regon/
|
|
http://www.stat.gov.pl/bip/regon_ENG_HTML.htm
|
|
https://wyszukiwarkaregon.stat.gov.pl/appBIR/index.aspx
|
|
|
|
>>> validate('192598184')
|
|
'192598184'
|
|
>>> validate('123456785')
|
|
'123456785'
|
|
>>> validate('192598183')
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
>>> validate('12345678512347')
|
|
'12345678512347'
|
|
>>> validate('12345678612342') # first check digit invalid
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
>>> validate('12345678512348') # last check digit invalid
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
"""
|
|
|
|
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."""
|
|
return clean(number, ' -').upper().strip()
|
|
|
|
|
|
def calc_check_digit(number):
|
|
"""Calculate the check digit for organisations. The number passed
|
|
should not have the check digit included."""
|
|
if len(number) == 8:
|
|
weights = (8, 9, 2, 3, 4, 5, 6, 7)
|
|
else:
|
|
weights = (2, 4, 8, 5, 0, 9, 7, 3, 6, 1, 2, 4, 8)
|
|
check = sum(w * int(n) for w, n in zip(weights, number))
|
|
return str(check % 11 % 10)
|
|
|
|
|
|
def validate(number):
|
|
"""Checks to see if the number provided is a valid REGON number. This
|
|
checks the length, formatting and check digit."""
|
|
number = compact(number)
|
|
if not number.isdigit():
|
|
raise InvalidFormat()
|
|
if len(number) not in (9, 14):
|
|
raise InvalidLength()
|
|
if number[-1] != calc_check_digit(number[:-1]):
|
|
raise InvalidChecksum()
|
|
if len(number) == 14 and number[8] != calc_check_digit(number[:8]):
|
|
raise InvalidChecksum()
|
|
return number
|
|
|
|
|
|
def is_valid(number):
|
|
"""Checks to see if the number provided is a valid REGON number. This
|
|
checks the length, formatting and check digit."""
|
|
try:
|
|
return bool(validate(number))
|
|
except ValidationError:
|
|
return False
|