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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_k8s_model(model_type, model_dict):
 """ Returns an instance of type specified model_type from an model instance or represantative dictionary. """

    model_dict = copy.deepcopy(model_dict)

    if isinstance(model_dict, model_type):
        return model_dict
    elif isinstance(model_dict, dict):
        # convert the dictionaries camelCase keys to snake_case keys
        model_dict = _map_dict_keys_to_model_attributes(model_type, model_dict)
        # use the dictionary keys to initialize a model of given type
        return model_type(**model_dict)
    else:
        raise AttributeError("Expected object of type 'dict' (or '{}') but got '{}'.".format(model_type.__name__, type(model_dict).__name__))