langcode-search / app.py
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import streamlit as st
import langcodes
# https://huggingface.co/blog/streamlit-spaces
langtext = st.text_input("language lookup using https://github.com/rspeer/langcodes, see also https://r12a.github.io/app-subtags/", "english")
st.write("Checking whether the tag is valid. That is, the language, script, territory, and variants (if present) are all tags that have meanings assigned by IANA.")
if langcodes.tag_is_valid(langtext):
st.write(f"...True! '{langtext}' parses meaningfully as a language tag according to IANA.")
else:
st.write(f"...False! '{langtext}' doesn't parse meaningfully as a language tag according to IANA, some of its subcomponents may be invalid or it might be a natural language description.")
try:
lang = langcodes.Language.get(langtext)
# st.write(f"{lang} is the BCP-47 tag.")
if "unknown" in lang.display_name().lower():
st.write(f"Attempting to lookup the code directly gives us '{lang.display_name()}', attempting to search for it as a natural language string.")
lang = None
except langcodes.LanguageTagError as e:
st.write(f"Could not lookup code directly, attempting to search for it as a natural language string.")
lang = None
if lang is None:
try:
found = langcodes.find(langtext)
lang = found
st.write(f"natural language search found the following BCP-47 tag: {lang}")
except LookupError as e:
st.write(f"Unable to look up language code.")
st.write(f"Try also: https://r12a.github.io/app-subtags/")
st.write(f"Try also: https://glottolog.org/glottolog?search={langtext}")
lang = None
def pull_obsolete_codes(iso_code):
from requests_html import HTMLSession
session = HTMLSession()
r= session.get(f"https://iso639-3.sil.org/code/{iso_code}")
for thing in r.html.find(".views-field-nothing", clean=True):
lines = thing.text.splitlines()
# lines = text.splitlines()
obsolete_codes = {}
for line in lines:
for obsolete_code_name in ["639-1","639-2/B", "639-2/T", "639-3"]
if obsolete_code_name in line:
print(line)
code = line.split()[-1]
print(code)
obsolete_codes[obsolete_code_name] = code
return obsolete_codes
#st.write(f"langcodes found the following tag: {type(found)}") # a Language object
if lang is not None:
display = lang.display_name()
st.write(f"Best-match BCP-47 tag for '{langtext}', according to the langcodes library: {lang}")
st.write(f"Breakdown of tag components: {lang.describe()}")
st.write(f"Display name for {lang}: {lang.display_name()}")
st.write(f"Autonym for {lang}: {lang.autonym()}")
b_variant = lang.to_alpha3(variant='B')
t_variant = lang.to_alpha3(variant='T')
st.write(f"ISO 639-3 'alpha3' code, 'terminology' variant (deprecated): {t_variant}")
st.write(f"ISO 639-3 'alpha3' code, 'bibliographic' variant (deprecated): {b_variant}")
st.write(f"If it exists, the ISO 639 Code Tables entry for the T variant would be at https://iso639-3.sil.org/code/{t_variant}")
st.write(f"If it exists, the ISO 639 Code Tables entry for the B variant would be at https://iso639-3.sil.org/code/{b_variant}")
# ethnologue prefers T for german (deu), and T for French
obsolete_codes = pull_obsolete_codes(t_variant)
broader_tags = lang.broader_tags()
st.write(f"Broader tags for this language, if any: {broader_tags}")
st.write(f"Correct, standardized, BCP-47 tag for {langtext}, according to the langcodes library: {langcodes.standardize_tag(lang)}")
st.write(f"Try also: https://r12a.github.io/app-subtags/?lookup={lang}")
st.write(f"https://glottolog.org/glottolog?search={t_variant} may be of interest, with links to Ethnologue, etc. If that doesn't work, try https://glottolog.org/glottolog?search={b_variant}")