$ sudo pip3 install protobuf pillow lxml jupyter matplotli 

$ sudo apt-get install protobuf-compiler python3-tk 

$ mkdir src/tensorflow $ cd src/tensorflow 

$ git clone https://github.com/tensorflow/models.git 

$ model/research 

$ protoc object_detection/protos/*.proto --python_out=. 

$ source ~/tensorflow/bin/activate

 (tensorflow) $ cd src/tensorflow/models/research

 (tensorflow) $ export PYTHONPATH=$PYTHONPATH:`pwd`:`pwd`/slim

 (tensorflow) $ python object_detection/builders/model_builder_test.py

  (tensorflow) $ python object_detection/builders/model_builder_test.py

  ........... ---------------------------------------------------------------------- Ran 11 tests in 0.057s  OK

 (tensorflow) $