def __init__(self, *args, **kwargs):
        try:
            self.model_class_path = kwargs.pop('model_class_path')
            self.content_field = kwargs.pop('content_field')
            self.filename_field = kwargs.pop('filename_field')
            self.mimetype_field = kwargs.pop('mimetype_field')
        except __HOLE__:
            raise KeyError(
                "keyword args 'model_class_path', 'content_field', "
                "'filename_field' and 'mimetype_field' are required."
            )
        super(FixedModelDatabaseFileStorage, self).__init__(*args, **kwargs)
dataset/ETHPy150Open victor-o-silva/db_file_storage/db_file_storage/storage.py/FixedModelDatabaseFileStorage.__init__