Arthur de Jong

Open Source / Free Software developer

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authorArthur de Jong <arthur@arthurdejong.org>2012-02-10 14:16:58 +0100
committerArthur de Jong <arthur@arthurdejong.org>2012-02-10 14:16:58 +0100
commit1aeeaf4eb61bffa368c502f98e7b13c46787068e (patch)
tree73d9a36e3c01743de2fdb7153dbf7a01ade77631
parent473b3cab02927707d11adb6f24e3c2c753ea2036 (diff)
add an Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number) module
git-svn-id: http://arthurdejong.org/svn/python-stdnum/python-stdnum@104 9dea7c4f-944c-4273-ac1a-574ede026edc
-rw-r--r--README1
-rw-r--r--stdnum/__init__.py1
-rw-r--r--stdnum/de/__init__.py0
-rw-r--r--stdnum/de/vat.py53
-rw-r--r--tests/test_robustness.doctest1
5 files changed, 56 insertions, 0 deletions
diff --git a/README b/README
index 36ec447..8c1a822 100644
--- a/README
+++ b/README
@@ -25,6 +25,7 @@ Currently this package supports the following formats:
* SSN (U.S. Social Security Number)
* HETU (Finnish personal identity code)
* FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
+ * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)
* IMEI (International Mobile Equipment Identity)
* IMSI (International Mobile Subscriber Identity)
* MEID (Mobile Equipment Identifier)
diff --git a/stdnum/__init__.py b/stdnum/__init__.py
index 25cc715..059314f 100644
--- a/stdnum/__init__.py
+++ b/stdnum/__init__.py
@@ -39,6 +39,7 @@ Currently this package supports the following formats:
* SSN (U.S. Social Security Number)
* HETU (Finnish personal identity code)
* FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
+ * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)
* IMEI (International Mobile Equipment Identity)
* IMSI (International Mobile Subscriber Identity)
* MEID (Mobile Equipment Identifier)
diff --git a/stdnum/de/__init__.py b/stdnum/de/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/stdnum/de/__init__.py
diff --git a/stdnum/de/vat.py b/stdnum/de/vat.py
new file mode 100644
index 0000000..0abc8c5
--- /dev/null
+++ b/stdnum/de/vat.py
@@ -0,0 +1,53 @@
+# vat.py - functions for handling German 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 German VAT (Umsatzsteur Identifikationnummer, Ust
+ID Nr.) numbers.
+
+>>> compact('DE 136,695 976')
+'136695976'
+>>> is_valid('DE136695976')
+True
+>>> is_valid('136695978')
+False
+"""
+
+from stdnum.iso7064 import mod_11_10
+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('DE'):
+ number = number[2:]
+ return number
+
+
+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 len(number) == 9 and number.isdigit() and \
+ number[0] != '0' and mod_11_10.is_valid(number)
diff --git a/tests/test_robustness.doctest b/tests/test_robustness.doctest
index 4437ebf..80297cf 100644
--- a/tests/test_robustness.doctest
+++ b/tests/test_robustness.doctest
@@ -28,6 +28,7 @@ invalid junk.
>>> from stdnum import luhn, meid, verhoeff
>>> from stdnum.br import cpf
>>> from stdnum.cz import rc
+>>> from stdnum.de import vat as de_vat
>>> from stdnum.fi import hetu
>>> from stdnum.fr import siren
>>> from stdnum.gr import vat as gr_vat