fix reference bug

paddle_hub/__init__.py

@@ -17,12 +17,12 @@ from .dir import MODULE_HOME
 from .dir import CACHE_HOME
 from . import module
 from . import tools
-from . import data
+from . import io
 from .module.module import Module, create_module
 from .module.base_processor import BaseProcessor
 from .module.signature import Signature, create_signature
 from .module.manager import default_module_manager
 from .tools.logger import logger
 from .tools.paddle_helper import connect_program
-from .data.type import DataType
+from .io.type import DataType
 from .hub_server import default_hub_server

paddle_hub/tools/downloader.py

@@ -26,7 +26,7 @@ import tempfile
 import tarfile
 from paddle_hub.tools import utils
 from paddle_hub.tools.logger import logger
-from paddle_hub.data.reader import csv_reader
+from paddle_hub.io.reader import csv_reader
 
 __all__ = ['Downloader']