diff options
| author | Arthur de Jong <arthur@arthurdejong.org> | 2012-02-18 15:16:27 +0100 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2012-02-18 15:16:27 +0100 |
| commit | ebbd1af2b947af5293ffb1b2078222ef4475b17d (patch) | |
| tree | 796ebd79ad8c3799c764334bcf871279ef4865fd /stdnum/pl | |
| parent | c75f07256957ba2759fa12e63f0645fd7d6ea567 (diff) | |
add a NIP (Numer Identyfikacji Podatkowej, Polish VAT number) module
git-svn-id: http://arthurdejong.org/svn/python-stdnum/python-stdnum@140 9dea7c4f-944c-4273-ac1a-574ede026edc
Diffstat (limited to 'stdnum/pl')
| -rw-r--r-- | stdnum/pl/__init__.py | 0 | ||||
| -rw-r--r-- | stdnum/pl/nip.py | 67 |
2 files changed, 67 insertions, 0 deletions
diff --git a/stdnum/pl/__init__.py b/stdnum/pl/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/stdnum/pl/__init__.py diff --git a/stdnum/pl/nip.py b/stdnum/pl/nip.py new file mode 100644 index 0000000..64dadf1 --- /dev/null +++ b/stdnum/pl/nip.py @@ -0,0 +1,67 @@ +# nip.py - functions for handling Polish 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 Polish NIP (Numer Identyfikacji Podatkowej, VAT) +numbers. + +The number consists of 10 digit with a straightforward weighted checksum. + +>>> compact('PL 8567346215') +'8567346215' +>>> is_valid('PL 8567346215') +True +>>> is_valid('PL 8567346216') # invalid check digits +False +>>> format('PL 8567346215') +'856-734-62-15' +""" + +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('PL'): + number = number[2:] + return number + + +def checksum(number): + """Calculate the checksum.""" + weights = (6, 5, 7, 2, 3, 4, 5, 6, 7, -1) + return sum(weights[i] * int(n) for i, n in enumerate(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 + return number.isdigit() and len(number) == 10 and \ + checksum(number) == 0 + + +def format(number): + """Reformat the passed number to the standard format.""" + number = compact(number) + return '-'.join((number[0:3], number[3:6], number[6:8], number[8:])) |