!8535 add export air test

From: @changzherui
Reviewed-by: @kingxian
Signed-off-by: @kingxian

mindspore/train/callback/_time_monitor.py

@@ -36,7 +36,7 @@ class TimeMonitor(Callback):
         self.epoch_time = time.time()
 
     def epoch_end(self, run_context):
-        epoch_seconds = (time.time() - self.epoch_time) * 1000
+        epoch_seconds = time.time() - self.epoch_time
         step_size = self.data_size
         cb_params = run_context.original_args()
         if hasattr(cb_params, "batch_num"):
@@ -49,4 +49,4 @@ class TimeMonitor(Callback):
             return
 
         step_seconds = epoch_seconds / step_size
-        print("Epoch time: {:5.3f}, per step time: {:5.3f}".format(epoch_seconds, step_seconds), flush=True)
+        print("Epoch time: {:5.3f}s, per step time: {:5.3f}s".format(epoch_seconds, step_seconds), flush=True)

mindspore/train/serialization.py

@@ -378,7 +378,8 @@ def load_param_into_net(net, parameter_dict, strict_load=False):
         logger.debug("%s", param_name)
 
     logger.info("Load parameter into net finish.")
-    logger.warning("{} parameters in the net are not loaded.".format(len(param_not_load)))
+    if param_not_load:
+        logger.warning("{} parameters in the net are not loaded.".format(len(param_not_load)))
     return param_not_load