For this sample, we've already generated the server and client stubs from helloworld.proto and we'll be using a specific reference platform.
Install gRPC:
  $ pip install grpcio
Or, to install it system wide:
	$ sudo pip install grpcio
Download the example
  $ # Clone the repository to get the example code:
  $ git clone https://github.com/grpc/grpc
  $ # Navigate to the "hello, world" Python example:
  $ cd grpc/examples/python/helloworld
Run the server
$ python2.7 greeter_server.py &
Run the client
$ python2.7 greeter_client.py
You can find a more detailed tutorial in gRPC Basics: Python