Unable to install tensorflow object detection API on windows 10

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• I am using the latest TensorFlow Model Garden release and TensorFlow 2.
• I am reporting the issue to the correct repository. (Model Garden official or research directory)
• I checked to make sure that this issue has not been filed already.

1. The entire URL of the file you are using

https://github.com/tensorflow/models/tree/master/official/...

2. Describe the bug

A clear and concise description of what the bug is.
While trying to check if object-detection-api installation is succesful,I tried to run the following command
python object_detection/builders/model_builder_tf2_test.py.
However it is giving me the error module tensorflow has no attribute contrib

3. Steps to reproduce

for installation of object-detection api

1. First, enter: !git clone https://github.com/tensorflow/models.git
2. pip install pycocotools
3. Then, download Protobuf:
   From the protoc releases page download the latest protoc--.zip. release (e.g. protoc-3.12.3-win64.zip for 64-bit Windows).
   Extract the contents of the downloaded protoc--.zip in a directory <PATH_TO_PB> of your choice (e.g. C:\Program Files\Google Protobuf).
   Open command prompt and cd to tensorflow\models\research.
   Run “<PATH_TO_PB>\protoc-3.4.0-win32\bin\protoc.exe” object_detection/protos/*.proto --python_out=.
   To test if this worked properly, go to the object_detection/protos folder, and make sure there are .py files.
   Steps to reproduce the behavior.
   4.Copy the setup.py file from tensorflow\research\object_detection\packages\tf2 to tensorflow\models\research
   5.Add tensorflow/models/research ,tensorflow/models/research/slim and tensorflow/models/research/object_detection to path.
   6.run python -m pip install --use-feature=2020-resolver .
   7.python object_detection/builders/model_builder_tf2_test.py

4. Expected behavior

A clear and concise description of what you expected to happen.
...
[ OK ] ModelBuilderTF2Test.test_create_ssd_models_from_config
[ RUN ] ModelBuilderTF2Test.test_invalid_faster_rcnn_batchnorm_update
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_invalid_faster_rcnn_batchnorm_update): 0.0s
I0608 18:49:13.183754 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_invalid_faster_rcnn_batchnorm_update): 0.0s
[ OK ] ModelBuilderTF2Test.test_invalid_faster_rcnn_batchnorm_update
[ RUN ] ModelBuilderTF2Test.test_invalid_first_stage_nms_iou_threshold
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_invalid_first_stage_nms_iou_threshold): 0.0s
I0608 18:49:13.186750 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_invalid_first_stage_nms_iou_threshold): 0.0s
[ OK ] ModelBuilderTF2Test.test_invalid_first_stage_nms_iou_threshold
[ RUN ] ModelBuilderTF2Test.test_invalid_model_config_proto
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_invalid_model_config_proto): 0.0s
I0608 18:49:13.188250 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_invalid_model_config_proto): 0.0s
[ OK ] ModelBuilderTF2Test.test_invalid_model_config_proto
[ RUN ] ModelBuilderTF2Test.test_invalid_second_stage_batch_size
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_invalid_second_stage_batch_size): 0.0s
I0608 18:49:13.190746 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_invalid_second_stage_batch_size): 0.0s
[ OK ] ModelBuilderTF2Test.test_invalid_second_stage_batch_size
[ RUN ] ModelBuilderTF2Test.test_session
[ SKIPPED ] ModelBuilderTF2Test.test_session
[ RUN ] ModelBuilderTF2Test.test_unknown_faster_rcnn_feature_extractor
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_unknown_faster_rcnn_feature_extractor): 0.0s
I0608 18:49:13.193742 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_unknown_faster_rcnn_feature_extractor): 0.0s
[ OK ] ModelBuilderTF2Test.test_unknown_faster_rcnn_feature_extractor
[ RUN ] ModelBuilderTF2Test.test_unknown_meta_architecture
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_unknown_meta_architecture): 0.0s
I0608 18:49:13.195241 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_unknown_meta_architecture): 0.0s
[ OK ] ModelBuilderTF2Test.test_unknown_meta_architecture
[ RUN ] ModelBuilderTF2Test.test_unknown_ssd_feature_extractor
INFO:tensorflow:time(main.ModelBuilderTF2Test.test_unknown_ssd_feature_extractor): 0.0s
I0608 18:49:13.197239 29296 test_util.py:2102] time(main.ModelBuilderTF2Test.test_unknown_ssd_feature_extractor): 0.0s
[ OK ] ModelBuilderTF2Test.test_unknown_ssd_feature_extractor

Ran 24 tests in 29.980s

OK (skipped=1)

5. Additional context

Include any logs that would be helpful to diagnose the problem.
File object_detection/builders/model_builder_tf2_test.py line 25 in module from object_detection.builders import box_predictor_builder
File object_detection.builders.box_predictor_builder line 20 in module from object_detection.predictors import convolutional_box_predictor
File convolutional_box_predictor line 22 in module slim=tf.contrib.slim
Error tensorflow has no attribute contrib

6. System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):
• Windows 10
• Mobile device name if the issue happens on a mobile device:
• TensorFlow installed from (source or binary) : from binary via pip install
• TensorFlow version (use command below):2.6 was installed during installation of object-detection-api
• Python version:3.8.5
• Bazel version (if compiling from source): none
• GCC/Compiler version (if compiling from source): none
• CUDA/cuDNN version:no gpu
• GPU model and memory: none