diff --git a/__init__.py b/__init__.py
index e69de29..2832034 100644
--- a/__init__.py
+++ b/__init__.py
@@ -0,0 +1,19 @@
+# Copyright 2021 Zilliz. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
+from .longformer import Longformer
+
+
+def longformer(model_name: str):
+    return Longformer(model_name)
diff --git a/longformer.py b/longformer.py
index 0d67981..3126249 100644
--- a/longformer.py
+++ b/longformer.py
@@ -1,5 +1,4 @@
 import numpy
-from typing import NamedTuple
 import torch
 from transformers import LongformerTokenizer, LongformerModel
 import logging
@@ -14,7 +13,7 @@ log = logging.getLogger()
 
 
 @register(output_schema=['vec'])
-class LongformerEmbedding(NNOperator):
+class Longformer(NNOperator):
     """
     NLP embedding operator that uses the pretrained longformer model gathered by huggingface.
     The Longformer model was presented in Longformer: The Long-Document Transformer by Iz Beltagy,