from pathlib import Path from argostranslate import package, translate import app.language def boot(load_only=None): try: check_and_install_models(load_only_lang_codes=load_only) except Exception as e: print("Cannot update models (normal if you're offline): %s" % str(e)) def check_and_install_models(force=False, load_only_lang_codes=None): if len(package.get_installed_packages()) < 2 or force: # Update package definitions from remote print("Updating language models") package.update_package_index() # Load available packages from local package index available_packages = package.get_available_packages() print("Found %s models" % len(available_packages)) if load_only_lang_codes is not None: # load_only_lang_codes: List[str] (codes) # Ensure the user does not use any unavailable language code. unavailable_lang_codes = set(load_only_lang_codes) for pack in available_packages: unavailable_lang_codes -= {pack.from_code, pack.to_code} if unavailable_lang_codes: raise ValueError( "Unavailable language codes: %s." % ",".join(sorted(unavailable_lang_codes)) ) # Keep only the packages that have both from_code and to_code in our list. available_packages = [ pack for pack in available_packages if pack.from_code in load_only_lang_codes and pack.to_code in load_only_lang_codes ] if not available_packages: raise ValueError("no available package") print("Keep %s models" % len(available_packages)) # Download and install all available packages for available_package in available_packages: print( "Downloading %s (%s) ..." % (available_package, available_package.package_version) ) download_path = available_package.download() package.install_from_path(download_path) # reload installed languages app.language.languages = translate.get_installed_languages() print( "Loaded support for %s languages (%s models total)!" % (len(translate.get_installed_languages()), len(available_packages)) )