deserialize object from the file.

        auto detect format by file extension name if `format` is None.
        for example, `.json` will detect as `json`.

        * raise `FormatNotFoundError` on unknown format.
        * raise `SerializeError` on any serialize exceptions.

def load(self, format=None, *, kwargs={}):
        '''
        deserialize object from the file.

        auto detect format by file extension name if `format` is None.
        for example, `.json` will detect as `json`.

        * raise `FormatNotFoundError` on unknown format.
        * raise `SerializeError` on any serialize exceptions.
        '''
        return load(self, format=format, kwargs=kwargs)