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Add support for Mozambique TIN
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Fixes #360
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@unho
unho committed Feb 5, 2023
1 parent 6d366e3 commit 7db8c74
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24 changes: 24 additions & 0 deletions stdnum/mz/__init__.py
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# __init__.py - collection of Mozambique numbers
# coding: utf-8
#
# Copyright (C) 2023 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

"""Collection of Mozambique numbers."""

# provide aliases
from stdnum.mz import nuit as vat # noqa: F401
84 changes: 84 additions & 0 deletions stdnum/mz/nuit.py
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# nuit.py - functions for handling Mozambique NUIT numbers
# coding: utf-8
#
# Copyright (C) 2023 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

"""NUIT (Número Único de Identificação Tributaria, Mozambique tax number).
This number consists of 9 digits, sometimes separated in three groups of three
digits using whitespace to make it easier to read.
The first digit indicates the type of entity. The next seven digits are a
sequential number. The last digit is the check digit, which is used to verify
the number was correctly typed.
More information:
* https://www.mobilize.org.mz/nuit-numero-unico-de-identificacao-tributaria/
* http://www.at.gov.mz/por/Perguntas-Frequentes2/NUIT
>>> validate('400339910')
'400339910'
>>> validate('400 005 834')
'400005834'
>>> validate('12345')
Traceback (most recent call last):
...
InvalidLength: ...
>>> format('400339910')
'400 339 910'
"""

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, ' -.').strip()


def validate(number):
"""Check if the number is a valid Mozambique NUIT number.
This checks the length and formatting.
"""
number = compact(number)
if len(number) != 9:
raise InvalidLength()
if not isdigits(number):
raise InvalidFormat()
return number


def is_valid(number):
"""Check if the number is a valid Mozambique NUIT 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[:3], number[3:-3], number[-3:]])
143 changes: 143 additions & 0 deletions tests/test_mz_nuit.doctest
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test_mz_nuit.doctest - more detailed doctests for stdnum.mz.nuit module

Copyright (C) 2023 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


This file contains more detailed doctests for the stdnum.mz.nuit module. It
tries to test more corner cases and detailed functionality that is not really
useful as module documentation.

>>> from stdnum.mz import nuit


Tests for some corner cases.

>>> nuit.validate('400339910')
'400339910'
>>> nuit.validate('400 005 834')
'400005834'
>>> nuit.validate('100.033.593')
'100033593'
>>> nuit.validate('12345')
Traceback (most recent call last):
...
InvalidLength: ...
>>> nuit.validate('VV3456789')
Traceback (most recent call last):
...
InvalidFormat: ...
>>> nuit.format('400339910')
'400 339 910'
>>> nuit.format('100.033.593')
'100 033 593'


These have been found online and should all be valid numbers.

>>> numbers = '''
...
... 400339910
... 400 005 834
... 500171650
... 700152855
... 400 005 834
... 400027145
... 400001391
... 400584291
... 103017602
... 101935626
... 400872120
... 500001615
... 400786704
... 500 024 240
... 400066183
... 500006005
... 401 191 607
... 400 102 961
... 105564724
... 500003545
... 400787451
... 116773767
... 111878641
... 154695168
... 102889010
... 101908372
... 149349324
... 400339910
... 400509182
... 400 006 245
... 400778922
... 400015546
... 401343261
... 401120807
... 400 108 791
... 400 415 870
... 108 755 423
... 108 755 385
... 400007225
... 401508317
... 400535825
... 400418810
... 401129006
... 400058172
... 400267839
... 500017341
... 700074854
... 401215298
... 400786704
... 400058921
... 400238685
... 400005516
... 500050012
... 400 052 786
... 400 111 200
... 400824037
... 400 410 151
... 120883275
... 100002892
... 118924045
... 400157715
... 400370028
... 129926945
... 400364001
... 101002561
... 400551847
... 400 769 052
... 400 120 323
... 100.033.593
... 105032031
... 401430989
... 103709776
... 500171650
... 400316341
... 400509182
... 400021260
... 400129551
... 400187398
... 600000063
... 400102961
... 400994579
... 400905649
... 500003839
... 401041877
... 400 380 972
... 400068038
...
... '''
>>> [x for x in numbers.splitlines() if x and not nuit.is_valid(x)]
[]

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