proto: python -m grpc_tools.protoc -I./example --python_out=./example --grpc_python_out=./example --python-grpc_out=./example ./example/helloworld.proto python -m grpc_tools.protoc -I./tests --python_out=./tests --python-grpc_out=./tests ./tests/protobuf/testing.proto server: @PYTHONPATH=. python example/server.py client: @PYTHONPATH=. python example/client.py