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| author | Leandro Regueiro <leandro.regueiro@gmail.com> | 2019-06-23 14:47:17 +0200 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2019-07-07 15:48:19 +0200 |
| commit | 4ad2d9cfb62aa477fb471efd6a0dd076548d976f (patch) | |
| tree | a151247ff6c5e4857be4a9e103c64a465ca3cdd7 /stdnum/ad/nrt.py | |
| parent | 510a46a8e8d08aa2f9464c6dfd086c3af80d03ce (diff) | |
Add Andorran TIN
Closes https://github.com/arthurdejong/python-stdnum/pull/145
Closes https://github.com/arthurdejong/python-stdnum/issues/119
Diffstat (limited to 'stdnum/ad/nrt.py')
| -rw-r--r-- | stdnum/ad/nrt.py | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/stdnum/ad/nrt.py b/stdnum/ad/nrt.py new file mode 100644 index 0000000..00185c9 --- /dev/null +++ b/stdnum/ad/nrt.py @@ -0,0 +1,93 @@ +# nrt.py - functions for handling Andorra NRT numbers +# coding: utf-8 +# +# Copyright (C) 2019 Leandro Regueiro +# +# 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 + +"""NRT (Número de Registre Tributari, Andorra tax number). + +The Número de Registre Tributari (NRT) is an identifier of legal and natural +entities for tax purposes. + +This number consists of one letter indicating the type of entity, then 6 +digits, followed by a check letter. + +More information: + +* https://www.oecd.org/tax/automatic-exchange/crs-implementation-and-assistance/tax-identification-numbers/Andorra-TIN.pdf + +>>> validate('U-132950-X') +'U132950X' +>>> validate('A123B') +Traceback (most recent call last): + ... +InvalidLength: ... +>>> validate('I 706193 G') +Traceback (most recent call last): + ... +InvalidComponent: ... +>>> format('D059888N') +'D-059888-N' +""" + +from stdnum.exceptions import * +from stdnum.util import clean, isdigits + + +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 validate(number): + """Check if the number is a valid Andorra NRT number. + + This checks the length, formatting and other contraints. It does not check + for control letter. + """ + number = compact(number) + if len(number) != 8: + raise InvalidLength() + if not number[0].isalpha() or not number[-1].isalpha(): + raise InvalidFormat() + if not isdigits(number[1:-1]): + raise InvalidFormat() + if number[0] not in 'ACDEFGLOPU': + raise InvalidComponent() + if number[0] == 'F' and number[1:-1] > '699999': + raise InvalidComponent() + if number[0] in 'AL' and not ('699999' < number[1:-1] < '800000'): + raise InvalidComponent() + return number + + +def is_valid(number): + """Check if the number is a valid Andorra NRT number.""" + try: + return bool(validate(number)) + except ValidationError: + return False + + +def format(number): + """Reformat the number to the standard presentation format.""" + number = compact(number) + return '-'.join([number[0], number[1:-1], number[-1]]) |