def METHOD_NAME(into, d):
    """merge two containers
    into is updated, d has priority
    """
    if isinstance(into, dict):
        for key in d.keys():
            if key not in into:
                into[key] = d[key]
            else:
                into[key] = METHOD_NAME(into[key], d[key])
        return into
    elif isinstance(into, list):
        return into + d
    else:
        return d