message: python methods should use snake case
diff: @@ -35,7 +35,7 @@ def rendezvous(channel):
  response = reply.response
  -def startTraining(channel):
  +def start_training(channel):
  stub = coordinator_pb2_grpc.CoordinatorStub(channel)
  req = coordinator_pb2.StartTrainingRequest()
  # send request to start training
  @@ -51,7 +51,7 @@ def startTraining(channel):
  # now simulate some training...
  -def endTraining(channel):
  +def end_training(channel):
  stub = coordinator_pb2_grpc.CoordinatorStub(channel)
  # build request starting with theta update
  nda1, nda2 = np.arange(20, 30), np.arange(30, 40)
  @@ -97,8 +97,8 @@ def run():
  heartbeat_thread.start()
  # do a training round
  - startTraining(channel)
  - endTraining(channel)
  + start_training(channel)
  + end_training(channel)
  try:
  # never returns unless there is an exception
  