How to use the manubot.util.read_serialized_data function in manubot

"""
    if variables is None:
        variables = {}
    for path in paths:
        logging.info(f"Reading user-provided templating variables at {path!r}")
        # Match only namespaces that are valid jinja2 variable names
        # http://jinja.pocoo.org/docs/2.10/api/#identifier-naming
        match = re.match(r"([a-zA-Z_][a-zA-Z0-9_]*)=(.+)", path)
        if match:
            namespace, path = match.groups()
            logging.info(
                f"Using the {namespace!r} namespace for template variables from {path!r}"
            )
        try:
            if match:
                obj = {namespace: read_serialized_data(path)}
            else:
                obj = read_serialized_dict(path)
        except Exception:
            logging.exception(f"Error reading template variables from {path!r}")
            continue
        assert isinstance(obj, dict)
        conflicts = variables.keys() & obj.keys()
        if conflicts:
            logging.warning(
                f"Template variables in {path!r} overwrite existing "
                "values for the following keys:\n" + "\n".join(conflicts)
            )
        variables.update(obj)
    logging.debug(
        f"Reading user-provided templating variables complete:\n"
        f"{json.dumps(variables, indent=2, ensure_ascii=False)}"