python-stdnum commit: r130 - in python-stdnum: . stdnum stdnum/sk tests

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

Author: arthur
Date: Fri Feb 17 16:02:05 2012
New Revision: 130
URL: http://arthurdejong.org/viewvc/python-stdnum?revision=130&view=revision

Log:
add IČ DPH (Identifikačné číslo pre daň z pridanej hodnoty, Slovak VAT number) 
module

Added:
   python-stdnum/stdnum/sk/dph.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 16 21:48:25 2012        (r129)
+++ python-stdnum/README        Fri Feb 17 16:02:05 2012        (r130)
@@ -43,6 +43,7 @@
  * Αριθμός Εγγραφής Φ.Π.Α. (Cypriot VAT number)
  * UID (Umsatzsteuer-Identifikationsnummer, Austrian VAT number)
  * NIF (Número de identificação fiscal, Portuguese VAT number)
+ * IČ DPH (Identifikačné číslo pre daň z pridanej hodnoty, Slovak 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    Thu Feb 16 21:48:25 2012        (r129)
+++ python-stdnum/stdnum/__init__.py    Fri Feb 17 16:02:05 2012        (r130)
@@ -57,6 +57,7 @@
  * Αριθμός Εγγραφής Φ.Π.Α. (Cypriot VAT number)
  * UID (Umsatzsteuer-Identifikationsnummer, Austrian VAT number)
  * NIF (Número de identificação fiscal, Portuguese VAT number)
+ * IČ DPH (Identifikačné číslo pre daň z pridanej hodnoty, Slovak VAT number)
  * IMEI (International Mobile Equipment Identity)
  * IMSI (International Mobile Subscriber Identity)
  * MEID (Mobile Equipment Identifier)
@@ -65,7 +66,6 @@
  * ISIL (International Standard Identifier for Libraries and Related
    Organizations)
 
-
 Furthermore a number of generic check digit algorithms are available:
 
  * the Verhoeff algorithm

Added: python-stdnum/stdnum/sk/dph.py
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ python-stdnum/stdnum/sk/dph.py      Fri Feb 17 16:02:05 2012        (r130)
@@ -0,0 +1,65 @@
+# vat.py - functions for handling Slovak 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 Slovak IČ DPH (Identifikačné číslo pre daň z
+pridanej hodnoty, VAT) numbers.
+
+The DPH is a 10-digit number used for VAT purposes. It has a
+straightforward checksum.
+
+>>> compact('SK 202 274 96 19')
+'2022749619'
+>>> is_valid('SK 202 274 96 19')
+True
+>>> is_valid('SK 202 274 96 18')  # invalid check digits
+False
+"""
+
+from stdnum.sk import rc
+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('SK'):
+        number = number[2:]
+    return number
+
+
+def checksum(number):
+    """Calculate the checksum."""
+    return int(number) % 11
+
+
+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
+    if not number.isdigit() or len(number) != 10:
+        return False
+    # it is unclear whether the RČ can be used as a valid VAT number
+    return rc.is_valid(number) or \
+           (number[0] != '0' and int(number[2]) in (2, 3, 4, 7, 8, 9) and
+            checksum(number) == 0)

Modified: python-stdnum/tests/test_robustness.doctest
==============================================================================
--- python-stdnum/tests/test_robustness.doctest Thu Feb 16 21:48:25 2012        
(r129)
+++ python-stdnum/tests/test_robustness.doctest Fri Feb 17 16:02:05 2012        
(r130)
@@ -44,6 +44,7 @@
 >>> from stdnum.nl import bsn, onderwijsnummer, btw
 >>> from stdnum.pt import nif as pt_nif
 >>> from stdnum.ro import cf, cnp
+>>> from stdnum.sk import dph
 >>> from stdnum.us import ssn
 
 Go over each imported module and try every value.
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