- layer: only calculate rms_error_accu() if status report is necessary

- Status: added wants_report

src/rbm/status.py

@@ -15,17 +15,15 @@ class Status:
 				print(f"{key}              : {value}{unit}")
 
 	def on_change(self, status: dict) -> bool:
-		do_continue = True
-		if status == {}:
-			self.progress = -1
-
-		if "progress" in status.keys():
-			progress = status["progress"]['value']
-			if self.progress < 0 or progress - self.progress >= self.update_interval:
-				self.progress = progress
-				do_continue = self.on_report(status=status)
+		do_continue = self.on_report(status=status)
 
 		return do_continue
 
+	def want_report(self, progress) -> bool:
+		if self.progress < 0 or progress - self.progress >= self.update_interval:
+			self.progress = progress
+			return True
+		return False
+
 	def on_report(self, status: dict) -> bool:
 		return True