This is an example repository showing what happens if you use gevent with grpc, and demonstrating that
running grpc calls in a gevent.threadpool allows gevent to run normally.
You can run make setup, or read the Makefile and copy the directions there as you see fit.
In one terminal:
$ go run server.goIn another terminal:
$ python client.py
2018-01-05 16:53:24.637027 [ 1] Started
2018-01-05 16:53:24.637386 [ 1] Spawned
2018-01-05 16:53:24.637804 [ 2] Started
2018-01-05 16:53:24.638113 [ 2] Spawned
2018-01-05 16:53:24.638290 [ 3] Started
2018-01-05 16:53:24.638590 [ 3] Spawned
...
2018-01-05 16:53:25.645519 [ 1] Received
2018-01-05 16:53:25.645593 [ 2] Received
2018-01-05 16:53:25.645652 [11] Received
2018-01-05 16:53:26.642848 [ 4] Received
...
Finished in 0:00:10.016921Note that python client.py plain will attempt to use gevent with grpc and just be synchronous (taking >50 s), whereas the default python client.py uses the gevent threadpool to actually do concurrent grpc requests and finishes in ~10 seconds.