63 lines
2 KiB
Python
63 lines
2 KiB
Python
# tva.py - functions for handling Monacan TVA numbers
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# coding: utf-8
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#
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# Copyright (C) 2017 Arthur de Jong
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301 USA
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"""n° TVA (taxe sur la valeur ajoutée, Monacan VAT number).
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For VAT purposes Monaco is treated as territory of France. The number is
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also validated the same as the French TVA, except that it is not based on
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a French SIREN.
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>>> compact('53 0000 04605')
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'FR53000004605'
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>>> validate('53 0000 04605')
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'FR53000004605'
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>>> validate('FR 61 954 506 077') # French numbers are invalid
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Traceback (most recent call last):
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...
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InvalidComponent: ...
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"""
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from __future__ import annotations
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from stdnum.exceptions import *
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from stdnum.fr import tva
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def compact(number: str) -> str:
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"""Convert the number to the minimal representation. This strips the
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number of any valid separators and removes surrounding whitespace."""
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return 'FR' + tva.compact(number)
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def validate(number: str) -> str:
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"""Check if the number is a valid VAT number. This checks the length,
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formatting and check digit."""
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number = tva.validate(number)
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if number[2:5] != '000':
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raise InvalidComponent()
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return 'FR' + number
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def is_valid(number: str) -> bool:
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"""Check if the number is a valid VAT number."""
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try:
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return bool(validate(number))
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except ValidationError:
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return False
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