app.py

import streamlit as st
import langcodes

# https://huggingface.co/blog/streamlit-spaces
langtext = st.text_input("language code", "en")

if langcodes.tag_is_valid(langtext):
  st.write(f"{langtext} is already a valid BCP-47 language tag")
else:
  st.write(f"{langtext} is not already a valid BCP-47 language tag")
    

try:
  lang = langcodes.Language.get(langtext)
except LanguageTagError as e: 
  st.write(f"Could not simiply instantiate, try looking up instead.")
  lang = None
  




try:
  found = langcodes.find(langtext)
  lang = found
except LookupError as e:
  st.write(f"Couldn't look up langtext, sorry: {e}")
  lang = None


#st.write(f"langcodes found the following tag: {type(found)}") # a Language object
display = lang.display_name()

st.write(f"langcodes found the following tag: {lang}")
st.write(f"Display name for {lang}: {display}")