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# nace.py - functions for handling EU NACE classification
# coding: utf-8
#
# Copyright (C) 2017-2019 Arthur de Jong
#
# 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
"""NACE (classification for businesses in the European Union).
The NACE (nomenclature statistique des activités économiques dans la
Communauté européenne) is a 4-level (and up to 4 digit) code for classifying
economic activities. It is the European implementation of the UN
classification ISIC.
The first 4 digits are the same in all EU countries while additional levels
and digits may be vary between countries. This module validates the numbers
according to revision 2 and based on the registry as published by the EC.
More information:
* https://en.wikipedia.org/wiki/Statistical_Classification_of_Economic_Activities_in_the_European_Community
* https://ec.europa.eu/eurostat/ramon/nomenclatures/index.cfm?TargetUrl=LST_NOM_DTL&StrNom=NACE_REV2&StrLanguageCode=EN&IntPcKey=&StrLayoutCode=HIERARCHIC
>>> validate('A')
'A'
>>> validate('62.01')
'6201'
>>> str(get_label('62.01'))
'Computer programming activities'
>>> validate('62.05')
Traceback (most recent call last):
...
InvalidComponent: ...
>>> validate('62059') # does not validate country-specific numbers
Traceback (most recent call last):
...
InvalidLength: ...
>>> format('6201')
'62.01'
""" # noqa: E501
import warnings
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 info(number):
"""Lookup information about the specified NACE. This returns a dict."""
number = compact(number)
from stdnum import numdb
info = dict()
for _n, i in numdb.get('eu/nace').info(number):
if not i:
raise InvalidComponent()
info.update(i)
return info
def get_label(number):
"""Lookup the category label for the number."""
return info(number)['label']
def label(number): # pragma: no cover (deprecated function)
"""DEPRECATED: use `get_label()` instead.""" # noqa: D40
warnings.warn(
'label() has been to get_label()',
DeprecationWarning, stacklevel=2)
return get_label(number)
def validate(number):
"""Check if the number is a valid NACE. This checks the format and
searches the registry to see if it exists."""
number = compact(number)
if len(number) > 4:
raise InvalidLength()
elif len(number) == 1:
if not number.isalpha():
raise InvalidFormat()
else:
if not isdigits(number):
raise InvalidFormat()
info(number)
return number
def is_valid(number):
"""Check if the number is a valid NACE. This checks the format and
searches the registry to see if it exists."""
try:
return bool(validate(number))
except ValidationError:
return False
def format(number):
"""Reformat the number to the standard presentation format."""
return '.'.join((number[:2], number[2:])).strip('.')
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