错误:
python3 ~/tools/openvino/model-optimizer/mo.py --input_model /home/fang/tools/open_model_zoo/tools/downloader/public/squeezenet1.1/squeezenet1.1.caffemodel --data_type FP16 --output_dir ./public/squeezenet1.1/fp16/
 Model Optimizer arguments:
 Common parameters:
     - Path to the Input Model:     /home/fang/tools/open_model_zoo/tools/downloader/public/squeezenet1.1/squeezenet1.1.caffemodel
     - Path for generated IR:     /home/fang/tools/open_model_zoo/tools/downloader/./public/squeezenet1.1/fp16/
     - IR output name:     squeezenet1.1
     - Log level:     ERROR
     - Batch:     Not specified, inherited from the model
     - Input layers:     Not specified, inherited from the model
     - Output layers:     Not specified, inherited from the model
     - Input shapes:     Not specified, inherited from the model
     - Mean values:     Not specified
     - Scale values:     Not specified
     - Scale factor:     Not specified
     - Precision of IR:     FP16
     - Enable fusing:     True
     - Enable grouped convolutions fusing:     True
     - Move mean values to preprocess section:     False
     - Reverse input channels:     False
 Caffe specific parameters:
     - Path to Python Caffe* parser generated from caffe.proto:     /home/fang/tools/openvino/model-optimizer/mo/front/caffe/proto
     - Enable resnet optimization:     True
     - Path to the Input prototxt:     /home/fang/tools/open_model_zoo/tools/downloader/public/squeezenet1.1/squeezenet1.1.prototxt
     - Path to CustomLayersMapping.xml:     Default
     - Path to a mean file:     Not specified
     - Offsets for a mean file:     Not specified
 Model Optimizer version:     unknown version
 [ WARNING ]  
 Detected not satisfied dependencies:
     protobuf: installed: 3.0.0, required: == 3.6.1
Please install required versions of components or use install_prerequisites script
 /home/fang/tools/openvino/model-optimizer/install_prerequisites/install_prerequisites_caffe.sh
 Note that install_prerequisites scripts may install additional components.
 [ ERROR ]  -------------------------------------------------
 [ ERROR ]  ----------------- INTERNAL ERROR ----------------
 [ ERROR ]  Unexpected exception happened.
 [ ERROR ]  Please contact Model Optimizer developers and forward the following information:
 [ ERROR ]  No module named 'generator'
 [ ERROR ]  Traceback (most recent call last):
   File "/home/fang/tools/openvino/model-optimizer/mo/main.py", line 307, in main
     return driver(argv)
   File "/home/fang/tools/openvino/model-optimizer/mo/main.py", line 272, in driver
     ret_res = emit_ir(prepare_ir(argv), argv)
   File "/home/fang/tools/openvino/model-optimizer/mo/main.py", line 227, in prepare_ir
     import_extensions.load_dirs(argv.framework, extensions, get_front_classes)
   File "/home/fang/tools/openvino/model-optimizer/mo/utils/import_extensions.py", line 104, in load_dirs
     load_dir(framework, path, get_front_classes)
   File "/home/fang/tools/openvino/model-optimizer/mo/utils/import_extensions.py", line 89, in load_dir
     import_by_path(os.path.join(path, *p), [ext, *p])
   File "/home/fang/tools/openvino/model-optimizer/mo/utils/import_extensions.py", line 33, in import_by_path
     importlib.import_module('{}.{}'.format('.'.join(middle_names), name))
   File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
   File "<frozen importlib._bootstrap>", line 971, in _find_and_load
   File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
   File "<frozen importlib._bootstrap_external>", line 678, in exec_module
   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
   File "/home/fang/tools/openvino/model-optimizer/mo/ops/expand_dims_test.py", line 20, in <module>
     from generator import generator, generate
 ModuleNotFoundError: No module named 'generator'
[ ERROR ]  ---------------- END OF BUG REPORT --------------
 [ ERROR ]  -------------------------------------------------
解决:
python3 -m pip install coverage m2r pyenchant pylint Sphinx safety test-generator