builder pattern using the builder patternwe can now redo our webform generator from abc import abcmetaabstractmethod class director(objectmetaclass=abcmeta)def __init__(self)self _builder none def set_builder(selfbuilder)self _builder builder @abstractmethod def construct(selffield_list)pass def get_constructed_object(self)return self _builder constructed_object class abstractformbuilder(objectmetaclass=abcmeta)def __init__(self)self constructed_object none @abstractmethod def add_text_field(selffield_dict)pass @abstractmethod def add_checkbox(selfcheckbox_dict)pass @abstractmethod def add_button(selfbutton_dict)pass class htmlform(object)def __init__(self)self field_list [