How to create a gRPC server in Python using proto3?

Question

According to this http://www.grpc.io/docs/tutorials/basic/python.html#creating-the-server and the examples here https://github.com/grpc/grpc/tree/v1.0.0/examples/python/route_guide, when I generate my _pb2.py file, several classes named *Stub and *Servicer should be created. However, my generated _pb2.py file doesn't contain anything like this.

This is how I generate my _pb2.py file:

protoc --proto_path=.venv/lib/python3.5/site-packages/grpc/tools/_proto/ --proto_path=.  --python_out=voyager/ voyager.proto

Is there something special about proto3 that means that these classes aren't generated? Or a protoc flag that I'm missing? I can't seem to figure out how to create a gRPC server.

Eric Anderson · Accepted Answer · 2016-09-27 22:30:16Z

2

It looks like you are missing --grpc_python_out=voyager/. There are two plugins involved: Protobuf Python and gRPC Python. You are only running the Protobuf one.

answered Sep 27, 2016 at 22:30

Eric Anderson

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