Fix bug introduced in customized trial (#1779)

src/sdk/pynni/nni/msg_dispatcher.py

@@ -184,7 +184,7 @@ class MsgDispatcher(MsgDispatcherBase):
         """
         id_ = data['parameter_id']
         value = data['value']
-        if not id_ or id_ in _customized_parameter_ids:
+        if id_ is None or id_ in _customized_parameter_ids:
             if not hasattr(self.tuner, '_accept_customized'):
                 self.tuner._accept_customized = False
             if not self.tuner._accept_customized:

test/config_test/multi_thread/multi_thread_tuner.py

+import logging
 import time
 from nni.tuner import Tuner
 
@@ -7,14 +8,18 @@ class MultiThreadTuner(Tuner):
         self.parent_done = False
 
     def generate_parameters(self, parameter_id, **kwargs):
+        logging.debug('generate_parameters: %s %s', parameter_id, kwargs)
         if parameter_id == 0:
             return {'x': 0}
         else:
             while not self.parent_done:
+                logging.debug('parameter_id %s sleeping', parameter_id)
                 time.sleep(2)
+            logging.debug('parameter_id %s waked up', parameter_id)
             return {'x': 1}
 
     def receive_trial_result(self, parameter_id, parameters, value, **kwargs):
+        logging.debug('receive_trial_result: %s %s %s %s', parameter_id, parameters, value, kwargs)
         if parameter_id == 0:
             self.parent_done = True