update pipeline

python/pipeline/__init__.py

@@ -11,9 +11,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import logger  # this module must be the first to import
-from operator import Op, RequestOp, ResponseOp
-from pipeline_server import PipelineServer
-from pipeline_client import PipelineClient
-from local_rpc_service_handler import LocalRpcServiceHandler
-from analyse import Analyst
+from . import logger  # this module must be the first to import
+from .operator import Op, RequestOp, ResponseOp
+from .pipeline_server import PipelineServer
+from .pipeline_client import PipelineClient
+from .local_rpc_service_handler import LocalRpcServiceHandler
+from .analyse import Analyst