121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
# nace.py - functions for handling EU NACE classification
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# coding: utf-8
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#
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# Copyright (C) 2017-2025 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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"""NACE (classification for businesses in the European Union).
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The NACE (nomenclature statistique des activités économiques dans la
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Communauté européenne) is a 4-level (and up to 4 digit) code for classifying
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economic activities. It is the European implementation of the UN
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classification ISIC.
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The first 4 digits are the same in all EU countries while additional levels
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and digits may be vary between countries. This module validates the numbers
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according to revision 2 and based on the registry as published by the EC.
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More information:
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* https://en.wikipedia.org/wiki/Statistical_Classification_of_Economic_Activities_in_the_European_Community
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* https://ec.europa.eu/eurostat/ramon/nomenclatures/index.cfm?TargetUrl=LST_NOM_DTL&StrNom=NACE_REV2&StrLanguageCode=EN&IntPcKey=&StrLayoutCode=HIERARCHIC
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>>> validate('A')
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'A'
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>>> validate('62.01')
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'6201'
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>>> get_label('62.01')
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'Computer programming activities'
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>>> validate('62.05')
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Traceback (most recent call last):
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...
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InvalidComponent: ...
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>>> validate('62059') # does not validate country-specific numbers
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Traceback (most recent call last):
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...
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InvalidLength: ...
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>>> format('6201')
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'62.01'
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""" # noqa: E501
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from __future__ import annotations
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import warnings
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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. This strips the
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number of any valid separators and removes surrounding whitespace."""
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return clean(number, '.').strip()
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def info(number: str) -> dict[str, str]:
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"""Lookup information about the specified NACE. This returns a dict."""
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number = compact(number)
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from stdnum import numdb
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info = dict()
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for _n, i in numdb.get('eu/nace').info(number):
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if not i:
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raise InvalidComponent()
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info.update(i)
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return info
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def get_label(number: str) -> str:
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"""Lookup the category label for the number."""
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return info(number)['label']
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def label(number: str) -> str: # pragma: no cover (deprecated function)
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"""DEPRECATED: use `get_label()` instead.""" # noqa: D40
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warnings.warn(
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'label() has been to get_label()',
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DeprecationWarning, stacklevel=2)
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return get_label(number)
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def validate(number: str) -> str:
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"""Check if the number is a valid NACE. This checks the format and
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searches the registry to see if it exists."""
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number = compact(number)
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if len(number) > 4:
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raise InvalidLength()
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elif len(number) == 1:
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if not number.isalpha():
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raise InvalidFormat()
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else:
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if not isdigits(number):
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raise InvalidFormat()
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info(number)
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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 NACE. This checks the format and
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searches the registry to see if it exists."""
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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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return '.'.join((number[:2], number[2:])).strip('.')
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