diff options
| author | Arthur de Jong <arthur@arthurdejong.org> | 2012-02-13 23:02:41 +0100 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2012-02-13 23:02:41 +0100 |
| commit | e0bb4e860b34a46202bab58e7b5110f802363550 (patch) | |
| tree | 0ceea9960e1a07d3b969ec7c1f92f9fb401cd561 /stdnum | |
| parent | 402a0d57dddce84cdfd9d37d4699eeaf4ed352d0 (diff) | |
add a Αριθμός Εγγραφής Φ.Π.Α. (Cypriot VAT number) module
git-svn-id: http://arthurdejong.org/svn/python-stdnum/python-stdnum@127 9dea7c4f-944c-4273-ac1a-574ede026edc
Diffstat (limited to 'stdnum')
| -rw-r--r-- | stdnum/__init__.py | 1 | ||||
| -rw-r--r-- | stdnum/cy/__init__.py | 0 | ||||
| -rw-r--r-- | stdnum/cy/vat.py | 68 |
3 files changed, 69 insertions, 0 deletions
diff --git a/stdnum/__init__.py b/stdnum/__init__.py index 45641dc..e03e3de 100644 --- a/stdnum/__init__.py +++ b/stdnum/__init__.py @@ -54,6 +54,7 @@ Currently this package supports the following formats: Luxembourgian VAT number) * CF (Cod de înregistrare în scopuri de TVA, Romanian VAT number) * Partita IVA (Italian VAT number) + * Αριθμός Εγγραφής Φ.Π.Α. (Cypriot VAT number) * IMEI (International Mobile Equipment Identity) * IMSI (International Mobile Subscriber Identity) * MEID (Mobile Equipment Identifier) diff --git a/stdnum/cy/__init__.py b/stdnum/cy/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/stdnum/cy/__init__.py diff --git a/stdnum/cy/vat.py b/stdnum/cy/vat.py new file mode 100644 index 0000000..b38a18f --- /dev/null +++ b/stdnum/cy/vat.py @@ -0,0 +1,68 @@ +# vat.py - functions for handling Cypriot VAT numbers +# coding: utf-8 +# +# Copyright (C) 2012 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 + +"""Module for handling Cypriot Αριθμός Εγγραφής Φ.Π.Α. (VAT) numbers. + +The number consists of 9 digits where the last one is a is a letter and +functions as a check digit. + +>>> compact('CY-10259033P') +'10259033P' +>>> is_valid('CY-10259033P ') +True +>>> is_valid('CY-10259033Z') # invalid check digit +False +""" + +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.""" + number = clean(number, ' -').upper().strip() + if number.startswith('CY'): + number = number[2:] + return number + + +def calc_check_digit(number): + """Calculate the check digit. The number passed should not have the + check digit included.""" + translation = { + '0': 1, '1': 0, '2': 5, '3': 7, '4': 9, + '5': 13, '6': 15, '7': 17, '8': 19, '9': 21, + } + return 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'[( + sum(translation[x] for x in number[::2]) + + sum(int(x) for x in number[1::2]) + ) % 26] + + +def is_valid(number): + """Checks to see if the number provided is a valid VAT number. This + checks the length, formatting and check digit.""" + try: + number = compact(number) + except: + return False + return len(number) == 9 and number[:-1].isdigit() and \ + number[0:2] != '12' and \ + number[-1] == calc_check_digit(number[:-1]) |