langs = []
    for lang_path in get_lang_paths():
        if lang_path.is_dir():
            langs.append(lang_path.name)
    print(json.dumps(langs))


@app.command()
def generate_docs_src_versions_for_file(file_path: Path) -> None:
    target_versions = ["py39", "py310"]
    base_content = file_path.read_text(encoding="utf-8")
    previous_content = {base_content}
    for target_version in target_versions: