python-stdnum commit: r133 - in python-stdnum: . stdnum stdnum/hu tests

[Commits of the python-stdnum project <python-stdnum-commits [at] lists.arthurdejong.org>]

Author: arthur
Date: Fri Feb 17 17:01:58 2012
New Revision: 133
URL: http://arthurdejong.org/viewvc/python-stdnum?revision=133&view=revision

Log:
add an ANUM (Közösségi adószám, Hungarian VAT number) module

Added:
   python-stdnum/stdnum/hu/
   python-stdnum/stdnum/hu/__init__.py
   python-stdnum/stdnum/hu/anum.py
Modified:
   python-stdnum/README
   python-stdnum/stdnum/__init__.py
   python-stdnum/tests/test_robustness.doctest

Modified: python-stdnum/README
==============================================================================
--- python-stdnum/README        Fri Feb 17 16:36:45 2012        (r132)
+++ python-stdnum/README        Fri Feb 17 17:01:58 2012        (r133)
@@ -46,6 +46,7 @@
  * IČ DPH (Identifikačné číslo pre daň z pridanej hodnoty, Slovak VAT number)
  * ALV nro (Arvonlisäveronumero, Finnish VAT number)
  * DIČ (Daňové identifikační číslo, Czech VAT number)
+ * ANUM (Közösségi adószám, Hungarian VAT number)
  * IMEI (International Mobile Equipment Identity)
  * IMSI (International Mobile Subscriber Identity)
  * MEID (Mobile Equipment Identifier)

Modified: python-stdnum/stdnum/__init__.py
==============================================================================
--- python-stdnum/stdnum/__init__.py    Fri Feb 17 16:36:45 2012        (r132)
+++ python-stdnum/stdnum/__init__.py    Fri Feb 17 17:01:58 2012        (r133)
@@ -60,6 +60,7 @@
  * IČ DPH (Identifikačné číslo pre daň z pridanej hodnoty, Slovak VAT number)
  * ALV nro (Arvonlisäveronumero, Finnish VAT number)
  * DIČ (Daňové identifikační číslo, Czech VAT number)
+ * ANUM (Közösségi adószám, Hungarian VAT number)
  * IMEI (International Mobile Equipment Identity)
  * IMSI (International Mobile Subscriber Identity)
  * MEID (Mobile Equipment Identifier)

Added: python-stdnum/stdnum/hu/__init__.py
==============================================================================

Added: python-stdnum/stdnum/hu/anum.py
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ python-stdnum/stdnum/hu/anum.py     Fri Feb 17 17:01:58 2012        (r133)
@@ -0,0 +1,59 @@
+# anum.py - functions for handling Hungarian 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 Hungarian ANUM (Közösségi adószám, VAT) numbers.
+
+It is an 8-digit taxpayer registration number that includes a weighted
+checksum.
+
+>>> compact('HU-12892312')
+'12892312'
+>>> is_valid('HU-12892312')
+True
+>>> is_valid('HU-12892313')  # 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('HU'):
+        number = number[2:]
+    return number
+
+
+def checksum(number):
+    """Calculate the checksum."""
+    weights = (9, 7, 3, 1, 9, 7, 3, 1)
+    return sum(weights[i] * int(n) for i, n in enumerate(number)) % 10
+
+
+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 number.isdigit() and len(number) == 8 and checksum(number) == 0

Modified: python-stdnum/tests/test_robustness.doctest
==============================================================================
--- python-stdnum/tests/test_robustness.doctest Fri Feb 17 16:36:45 2012        
(r132)
+++ python-stdnum/tests/test_robustness.doctest Fri Feb 17 17:01:58 2012        
(r133)
@@ -37,6 +37,7 @@
 >>> from stdnum.fi import hetu, alv
 >>> from stdnum.fr import siren
 >>> from stdnum.gr import vat as gr_vat
+>>> from stdnum.hu import anum
 >>> from stdnum.iso7064 import mod_11_10, mod_11_2, mod_37_2, mod_37_36, 
 >>> mod_97_10
 >>> from stdnum.it import iva
 >>> from stdnum.lu import tva
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