def decode(self, input, errors='<STR_LIT:strict>'):
raise NotImplementedError<EOL>
Decodes the object input and returns a tuple (output
            object, length consumed).

            input must be an object which provides the bf_getreadbuf
            buffer slot. Python strings, buffer objects and memory
            mapped files are examples of objects providing this slot.

            errors defines the error handling to apply. It defaults to
            'strict' handling.

            The method may not store state in the Codec instance. Use
            StreamReader for codecs which have to keep state in order to
            make decoding efficient.

            The decoder must be able to handle zero length input and
            return an empty object of the output object type in this
            situation.