Get corpus path

    :param string name: corpus name

def get_corpus_path(name: str) -> [str, None]:
    """
    Get corpus path

    :param string name: corpus name
    """
    db = TinyDB(corpus_db_path())
    temp = Query()

    if len(db.search(temp.name == name)) > 0:
        path = get_full_data_path(db.search(temp.name == name)[0]["file"])
        db.close()

        if not os.path.exists(path):
            download(name)

        return path

    return None