python-stdnum commit: r122 - in python-stdnum: . stdnum stdnum/ro tests

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

Author: arthur
Date: Sun Feb 12 14:33:23 2012
New Revision: 122
URL: http://arthurdejong.org/viewvc/python-stdnum?revision=122&view=revision

Log:
add a CNP (Cod Numeric Personal, Romanian Numerical Personal Code) module

Added:
   python-stdnum/stdnum/ro/
   python-stdnum/stdnum/ro/__init__.py
   python-stdnum/stdnum/ro/cnp.py
Modified:
   python-stdnum/README
   python-stdnum/stdnum/__init__.py
   python-stdnum/tests/test_robustness.doctest

Modified: python-stdnum/README
==============================================================================
--- python-stdnum/README        Sun Feb 12 11:11:48 2012        (r121)
+++ python-stdnum/README        Sun Feb 12 14:33:23 2012        (r122)
@@ -29,6 +29,7 @@
  * DNI (Documento nacional de identidad, Spanish personal identity codes)
  * NIE (Número de Identificación de Extranjeros, Spanish identification number
    for foreigners)
+ * CNP (Cod Numeric Personal, Romanian Numerical Personal Code)
  * NIF (Número de Identificación Fiscal, Spanish VAT number)
  * FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
  * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)

Modified: python-stdnum/stdnum/__init__.py
==============================================================================
--- python-stdnum/stdnum/__init__.py    Sun Feb 12 11:11:48 2012        (r121)
+++ python-stdnum/stdnum/__init__.py    Sun Feb 12 14:33:23 2012        (r122)
@@ -43,6 +43,7 @@
  * DNI (Documento nacional de identidad, Spanish personal identity codes)
  * NIE (Número de Identificación de Extranjeros, Spanish identification number
    for foreigners)
+ * CNP (Cod Numeric Personal, Romanian Numerical Personal Code)
  * NIF (Número de Identificación Fiscal, Spanish VAT number)
  * FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
  * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)

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

Added: python-stdnum/stdnum/ro/cnp.py
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ python-stdnum/stdnum/ro/cnp.py      Sun Feb 12 14:33:23 2012        (r122)
@@ -0,0 +1,89 @@
+# cnp.py - functions for handling Romanian CNP 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 Romanian CNP (Cod Numeric Personal, Numerical
+Personal Code) numbers.
+
+It is a 13 digit number that includes information on the person's gender,
+birth date and country zone.
+
+>>> compact('1630615123457')
+'1630615123457'
+>>> is_valid('1630615123457')
+True
+>>> is_valid('8800101221144')  # invalid first digit
+False
+>>> is_valid('1632215123457')  # invalid date
+False
+>>> is_valid('1630615123458')  # invalid check digit
+False
+"""
+
+import datetime
+
+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 personal codes. The number passed
+    should not have the check digit included."""
+    # note that this algorithm has not been confirmed by an independent source
+    weights = (2, 7, 9, 1, 4, 6, 3, 5, 8, 2, 7, 9)
+    check = sum(weights[i] * int(n) for i, n in enumerate(number)) % 11
+    return '1' if check == 10 else str(check)
+
+
+def get_birth_date(number):
+    """Split the date parts from the number and return the birth date."""
+    centuries = {
+        '1': 1900, '2': 1900, '3': 1800, '4': 1800, '5': 2000, '6': 2000,
+    }  # we assume 1900 for the others in order to try to construct a date
+    year = int(number[1:3]) + centuries.get(number[0], 1900)
+    month = int(number[3:5])
+    day = int(number[5:7])
+    return datetime.date(year, month, day)
+
+
+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 len(number) != 13 or not number.isdigit():
+        return False
+    # first digit should be a known one (9=foreigner)
+    if number[0] not in '1234569':
+        return False
+    # check if birth date is valid
+    try:
+        birth_date = get_birth_date(number)
+        # TODO: check that the birth date is not in the future
+    except ValueError, e:
+        return False
+    # number[7:9] is the county, we ignore it for now, just check last digit
+    return calc_check_digit(number[:-1]) == number[-1]

Modified: python-stdnum/tests/test_robustness.doctest
==============================================================================
--- python-stdnum/tests/test_robustness.doctest Sun Feb 12 11:11:48 2012        
(r121)
+++ python-stdnum/tests/test_robustness.doctest Sun Feb 12 14:33:23 2012        
(r122)
@@ -39,6 +39,7 @@
 >>> from stdnum.lu import tva
 >>> from stdnum.lv import pvn
 >>> from stdnum.nl import bsn, onderwijsnummer, btw
+>>> from stdnum.ro import cnp
 >>> from stdnum.us import ssn
 
 Go over each imported module and try every value.
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