Method __subclasscheck__

code/interface.py:47–51

(cls, subclass)

        return cls.__subclasscheck__(type(instance))

    def __subclasscheck__(cls, subclass):
        return (hasattr(subclass, 'load_data_source') and
                callable(subclass.load_data_source) and
                hasattr(subclass, 'extract_text') and
                callable(subclass.extract_text))

class UpdatedInformalParserInterface(metaclass=ParserMeta):
    """This interface is used for concrete classes to inherit from.