title: Python GRPC - Connection open/close handler
body: <p>I would like to have some notification/handler whenever the grpc server opens/closes a new transport connection with some client.</p>
  
  <p>I found this <a href="https://stackoverflow.com/questions/40543439/how-to-log-client-connection-to-server-for-grpc">question</a> which leads to this <a href="https://github.com/grpc/grpc-java/issues/2132" rel="nofollow noreferrer">ServerTransportFilter</a> solution. However, this option refers to the <strong>grpc-java</strong> implementation.
  I searched for it on the python grpc package and coud not find it.</p>
  
  <p>The closest mechanism I found is the interceptor argument in the server constructor, but this happens every rpc and anyhow does not contain information regarding connection opening/closing.</p>