/usr/lib/python3/dist-packages/aeidon/languages.py is in python3-aeidon 1.3.1-1.
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# Copyright (C) 2005 Osmo Salomaa
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Names and ISO 639 codes for languages and conversions between them."""
import aeidon
import json
import os
from aeidon.i18n import d_
_languages = {}
def _init_languages():
"""Initialize the dictionary mapping codes to names."""
# Prefer globally installed iso-codes, JSON over XML,
# fall back on possibly bundled JSON.
path = "/usr/share/iso-codes/json/iso_639-2.json"
if os.path.isfile(path):
return _init_languages_json(path)
path = "/usr/share/xml/iso-codes/iso_639.xml"
if os.path.isfile(path):
return _init_languages_xml(path)
path = os.path.join(aeidon.DATA_DIR, "iso-codes", "iso_639-2.json")
if os.path.isfile(path):
return _init_languages_json(path)
def _init_languages_json(path):
"""Initialize the dictionary mapping codes to names."""
with open(path, "r") as f:
iso = json.load(f)
for language in iso["639-2"]:
code = language.get("alpha_2", None)
name = language.get("name", None)
if not code or not name: continue
_languages[code] = name
def _init_languages_xml(path):
"""Initialize the dictionary mapping codes to names."""
import xml.etree.ElementTree as ET
for element in ET.parse(path).findall("iso_639_entry"):
code = element.get("iso_639_1_code", None)
name = element.get("name", None)
if not code or not name: continue
_languages[code] = name
def code_to_name(code):
"""Convert ISO 639 `code` to localized language name."""
if not _languages:
_init_languages()
with aeidon.util.silent(LookupError):
return d_("iso_639", _languages[code])
return code
def is_valid(code):
"""Return ``True`` if `code` is a valid ISO 639 language code."""
if not _languages:
_init_languages()
return code in _languages
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