python-stdnum commit: r96 - in python-stdnum: . stdnum stdnum/nl tests

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

Author: arthur
Date: Thu Feb  2 22:12:52 2012
New Revision: 96
URL: http://arthurdejong.org/viewvc/python-stdnum?revision=96&view=revision

Log:
add a BTW (the Dutch VAT number) module

Added:
   python-stdnum/stdnum/nl/btw.py
Modified:
   python-stdnum/README
   python-stdnum/stdnum/__init__.py
   python-stdnum/tests/test_robustness.doctest

Modified: python-stdnum/README
==============================================================================
--- python-stdnum/README        Thu Feb  2 22:09:26 2012        (r95)
+++ python-stdnum/README        Thu Feb  2 22:12:52 2012        (r96)
@@ -16,6 +16,7 @@
  * EAN (International Article Number)
  * BSN (Burgerservicenummer, the Dutch national identification number)
  * Onderwijsnummer (Dutch school number)
+ * BTW (the Dutch VAT number)
  * CPF (Cadastro de Pessoas Físicas, the Brazillian national identification
    number)
  * SSN (U.S. Social Security Number)

Modified: python-stdnum/stdnum/__init__.py
==============================================================================
--- python-stdnum/stdnum/__init__.py    Thu Feb  2 22:09:26 2012        (r95)
+++ python-stdnum/stdnum/__init__.py    Thu Feb  2 22:12:52 2012        (r96)
@@ -30,6 +30,7 @@
  * EAN (International Article Number)
  * BSN (Burgerservicenummer, the Dutch national identification number)
  * Onderwijsnummer (Dutch school number)
+ * BTW (the Dutch VAT number)
  * CPF (Cadastro de Pessoas Físicas, the Brazillian national identification
    number)
  * SSN (U.S. Social Security Number)

Added: python-stdnum/stdnum/nl/btw.py
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ python-stdnum/stdnum/nl/btw.py      Thu Feb  2 22:12:52 2012        (r96)
@@ -0,0 +1,52 @@
+# btw.py - functions for handling Dutch VAT numbers
+#
+# 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 Dutch VAT (BTW) numbers.
+
+>>> is_valid('00449544B01')
+True
+>>> is_valid('NL449544B01')
+True
+>>> is_valid('123456789B90')
+False
+"""
+
+from stdnum.nl import bsn
+
+
+def compact(number):
+    """Convert the number to the minimal representation. This strips the
+    number of any valid separators and removes surrounding whitespace."""
+    number = number.replace(' ', '').replace('-', '').replace('.', 
'').upper().strip()
+    if number.startswith('NL'):
+        number = number[2:]
+    return bsn.compact(number[:-3]) + number[-3:]
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid BTW number. This checks
+    the length, formatting and check digit."""
+    try:
+        number = compact(number)
+    except:
+        return False
+    return len(number) == 12 and \
+           number[9] == 'B' and \
+           number[10:].isdigit() and \
+           bsn.is_valid(number[0:9])

Modified: python-stdnum/tests/test_robustness.doctest
==============================================================================
--- python-stdnum/tests/test_robustness.doctest Thu Feb  2 22:09:26 2012        
(r95)
+++ python-stdnum/tests/test_robustness.doctest Thu Feb  2 22:12:52 2012        
(r96)
@@ -27,7 +27,7 @@
 >>> from stdnum import grid, iban, imei, imsi, isan, isbn, isil, ismn, issn, 
 >>> ean
 >>> from stdnum import luhn, meid, verhoeff
 >>> from stdnum.iso7064 import mod_11_10, mod_11_2, mod_37_2, mod_37_36, 
 >>> mod_97_10
->>> from stdnum.nl import bsn, onderwijsnummer
+>>> from stdnum.nl import bsn, onderwijsnummer, btw
 >>> from stdnum.br import cpf
 >>> from stdnum.us import ssn
 >>> from stdnum.fi import hetu
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