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Add support for Mozambique TIN
Closes #360 Closes #392 Closes #473
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‎stdnum/mz/__init__.py

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# __init__.py - collection of Mozambique numbers
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# coding: utf-8
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#
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# Copyright (C) 2023 Leandro Regueiro
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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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"""Collection of Mozambique numbers."""
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from __future__ import annotations
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# provide aliases
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from stdnum.mz import nuit as vat # noqa: F401

‎stdnum/mz/nuit.py

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# nuit.py - functions for handling Mozambique NUIT numbers
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# coding: utf-8
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#
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# Copyright (C) 2023 Leandro Regueiro
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# Copyright (C) 2025 Luca Sicurello
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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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"""NUIT (Número Único de Identificação Tributaria, Mozambique tax number).
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This number consists of 9 digits, sometimes separated in three groups of three
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digits using whitespace to make it easier to read.
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The first digit indicates the type of entity. The next seven digits are a
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sequential number. The last digit is the check digit, which is used to verify
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the number was correctly typed.
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More information:
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* https://www.mobilize.org.mz/nuit-numero-unico-de-identificacao-tributaria/
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* https://www.at.gov.mz/por/Perguntas-Frequentes2/NUIT
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>>> validate('400339910')
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'400339910'
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>>> validate('400 005 834')
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'400005834'
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>>> validate('12345')
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Traceback (most recent call last):
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...
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InvalidLength: ...
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>>> format('400339910')
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'400 339 910'
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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.util import clean, isdigits
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def compact(number: str) -> str:
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"""Convert the number to the minimal representation."""
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return clean(number, ' -.').strip()
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def calc_check_digit(number: str) -> str:
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"""Calculate the check digit."""
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weights = (8, 9, 4, 5, 6, 7, 8, 9)
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check = sum(w * int(n) for w, n in zip(weights, number)) % 11
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return '01234567891'[check]
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def validate(number: str) -> str:
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"""Check if the number is a valid Mozambique NUIT number."""
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number = compact(number)
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if len(number) != 9:
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raise InvalidLength()
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if not isdigits(number):
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raise InvalidFormat()
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if calc_check_digit(number[:-1]) != number[-1]:
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raise InvalidChecksum()
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return number
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def is_valid(number: str) -> bool:
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"""Check if the number is a valid Mozambique NUIT 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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def format(number: str) -> str:
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"""Reformat the number to the standard presentation format."""
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number = compact(number)
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return ' '.join([number[:3], number[3:-3], number[-3:]])

‎tests/test_mz_nuit.doctest

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test_mz_nuit.doctest - more detailed doctests for stdnum.mz.nuit module
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Copyright (C) 2023 Leandro Regueiro
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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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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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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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This file contains more detailed doctests for the stdnum.mz.nuit module. It
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tries to test more corner cases and detailed functionality that is not really
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useful as module documentation.
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>>> from stdnum.mz import nuit
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Tests for some corner cases.
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>>> nuit.validate('400339910')
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'400339910'
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>>> nuit.validate('400 005 834')
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'400005834'
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>>> nuit.validate('100.033.593')
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'100033593'
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>>> nuit.validate('12345')
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Traceback (most recent call last):
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...
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InvalidLength: ...
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>>> nuit.validate('VV3456789')
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Traceback (most recent call last):
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...
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InvalidFormat: ...
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>>> nuit.validate('101935626')
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Traceback (most recent call last):
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...
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InvalidChecksum: ...
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>>> nuit.format('400339910')
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'400 339 910'
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>>> nuit.format('100.033.593')
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'100 033 593'
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These have been found online and should all be valid numbers.
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>>> numbers = '''
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...
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... 400339910
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... 400 005 834
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... 500171650
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... 700152855
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... 400 005 834
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... 400027145
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... 400001391
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... 400584291
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... 103017602
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... 400872120
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... 500001615
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... 400786704
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... 500 024 240
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... 400066183
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... 500006005
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... 401 191 607
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... 400 102 961
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... 105564724
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... 500003545
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... 400787451
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... 116773767
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... 111878641
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... 154695168
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... 102889010
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... 101908372
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... 149349324
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... 400339910
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... 400509182
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... 400 006 245
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... 400778922
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... 400015546
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... 401343261
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... 401120807
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... 400 108 791
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... 400 415 870
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... 108 755 423
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... 108 755 385
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... 400007225
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... 401508317
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... 400535825
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... 400418810
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... 401129006
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... 400058172
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... 400267839
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... 500017341
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... 700074854
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... 401215298
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... 400786704
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... 400058921
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... 400238685
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... 400005516
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... 500050012
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... 400 052 786
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... 400 111 200
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... 400824037
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... 400 410 151
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... 120883275
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... 100002892
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... 118924045
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... 400157715
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... 400370028
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... 129926945
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... 400364001
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... 101002561
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... 400551847
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... 400 769 052
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... 400 120 323
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... 100.033.593
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... 105032031
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... 401430989
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... 103709776
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... 500171650
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... 400316341
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... 400509182
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... 400021260
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... 400129551
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... 400187398
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... 600000063
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... 400102961
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... 400994579
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... 400905649
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... 500003839
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... 401041877
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... 400068038
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...
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... '''
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>>> [x for x in numbers.splitlines() if x and not nuit.is_valid(x)]
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[]

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