How to fix Python ModuleNotFoundError: No module named 'grpc_tools'

In order to fix issues like

File "/home/user/test.py", line 12, in load_proto
    from grpc_tools import protoc
ModuleNotFoundError: No module named 'grpc_tools'

you need to install the grpcio-tools package. You can do this via pip:

pip install grpcio-tools