python-stdnum branch master updated. 1.0-8-g84620f8

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http://arthurdejong.org/git/python-stdnum/commit/?id=84620f864b4c13627edc0f1c71ec43b8fec54f65

commit 84620f864b4c13627edc0f1c71ec43b8fec54f65
Author: Tuomas Toivonen <toivotuo@kasvua.org>
Date:   Sat Apr 11 22:43:40 2015 +0300

    Support Icelandic personal, organisation and VAT identifiers
    
    The package is named "is_" because "is" is a reserved word.

diff --git a/stdnum/is_/__init__.py b/stdnum/is_/__init__.py
new file mode 100644
index 0000000..a4473c9
--- /dev/null
+++ b/stdnum/is_/__init__.py
@@ -0,0 +1,24 @@
+# __init__.py - collection of Icelandic numbers
+# coding: utf-8
+#
+# Copyright (C) 2015 Tuomas Toivonen
+#
+# 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
+
+"""Collection of Icelandic numbers."""
+
+# provide vat as an alias
+from stdnum.is_ import vsk as vat
diff --git a/stdnum/is_/kennitala.py b/stdnum/is_/kennitala.py
new file mode 100644
index 0000000..5e8bab6
--- /dev/null
+++ b/stdnum/is_/kennitala.py
@@ -0,0 +1,114 @@
+# kennitala.py - functions for handling Icelandic identity codes
+# coding: utf-8
+#
+# Copyright (C) 2015 Tuomas Toivonen
+# Copyright (C) 2015 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
+
+"""Kennitala (Icelandic personal and organisation identity code).
+
+Module for handling Icelandic personal and organisation identity codes
+(kennitala).
+
+>>> validate('450401-3150')  # organisation
+'4504013150'
+>>> validate('120174-3399')  # individual
+'1201743399'
+>>> validate('530575-0299')
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> validate('320174-3399')
+Traceback (most recent call last):
+    ...
+InvalidComponent: ...
+"""
+
+import re
+import datetime
+
+from stdnum.exceptions import *
+from stdnum.util import clean
+
+
+# Icelandic personal and organisation identity codes are composed of
+# date part, a dash, two random digits, a checksum, and a century
+# indicator where '9' for 1900-1999 and '0' for 2000 and beyond. For
+# organisations instead of birth date, the registration date is used,
+# and number 4 is added to the first digit.
+_kennitala_re = re.compile(
+    r'^(?P<day>[01234567]\d)(?P<month>[01]\d)(?P<year>\d\d)'
+    r'(?P<random>\d\d)(?P<control>\d)'
+    r'(?P<century>[09])$')
+
+
+def compact(number):
+    """Convert the kennitala to the minimal representation. This
+    strips surrounding whitespace and separation dash, and converts it
+    to upper case."""
+    return clean(number, '-').upper().strip()
+
+
+def checksum(number):
+    """Calculate the checksum."""
+    weights = (3, 2, 7, 6, 5, 4, 3, 2, 1, 0)
+    return sum(weights[i] * int(n) for i, n in enumerate(number)) % 11
+
+
+def validate(number):
+    """Checks to see if the number provided is a valid kennitala. It
+    checks the format, whether a valid date is given and whether the
+    check digit is correct."""
+    number = compact(number)
+    match = _kennitala_re.search(number)
+    if not match:
+        raise InvalidFormat()
+    day = int(match.group('day'))
+    month = int(match.group('month'))
+    year = int(match.group('year'))
+    if match.group('century') == '9':
+        year += 1900
+    else:
+        year += 2000
+    # check if birth date or registration data is valid
+    try:
+        if day >= 40:  # organisation
+            datetime.date(year, month, day-40)
+        else:  # individual
+            datetime.date(year, month, day)
+    except ValueError:
+        raise InvalidComponent()
+    # validate the checksum
+    if checksum(number) != 0:
+        raise InvalidChecksum()
+    return number
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid HETU. It checks the
+    format, whether a valid date is given and whether the check digit is
+    correct."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False
+
+
+def format(number):
+    """Reformat the passed number to the standard format."""
+    number = compact(number)
+    return number[:6] + '-' + number[6:]
diff --git a/stdnum/is_/vsk.py b/stdnum/is_/vsk.py
new file mode 100644
index 0000000..0baf895
--- /dev/null
+++ b/stdnum/is_/vsk.py
@@ -0,0 +1,63 @@
+# vsk.py - functions for handling Icelandic VAT numbers
+# coding: utf-8
+#
+# Copyright (C) 2015 Tuomas Toivonen
+#
+# 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
+
+"""VSK number (Virðisaukaskattsnúmer, Icelandic VAT number).
+
+The Icelandic VAT number is five or six digits.
+
+>>> validate('IS 00621')
+'00621'
+>>> validate('IS 0062199')
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+"""
+
+from stdnum.exceptions import *
+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('IS'):
+        number = number[2:]
+    return number
+
+
+def validate(number):
+    """Checks to see if the number provided is a valid VAT number. This
+    checks the length and formatting."""
+    number = compact(number)
+    if not number.isdigit():
+        raise InvalidFormat()
+    if len(number) not in (5, 6):
+        raise InvalidLength()
+    return number
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid VAT number. This
+    checks the length and formatting."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False

-----------------------------------------------------------------------

Summary of changes:
 stdnum/{no => is_}/__init__.py    |    6 +-
 stdnum/is_/kennitala.py           |  114 +++++++++++++++++++++++++++++++++++++
 stdnum/{ee/kmkr.py => is_/vsk.py} |   34 +++++------
 3 files changed, 130 insertions(+), 24 deletions(-)
 copy stdnum/{no => is_}/__init__.py (87%)
 create mode 100644 stdnum/is_/kennitala.py
 copy stdnum/{ee/kmkr.py => is_/vsk.py} (68%)


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