fixed RemoteMonitor: Json to handle np.float32 and np.int32 types (ke…

…ras-team#9261)

* casted ReduceLRonPlateau lr log to float

Previously lr log had dtype numpy.float32 which throws JSON serializable error if used along with Remote monitor callback.

* Undone changes made:Revert "casted ReduceLRonPlateau lr log to float"

This reverts commit 6d3c3dd.

* fixed RemoteMonitor json to handle np.float32 and np.int32 types

* fixed RemoteMonitor json to handle np.float32 and np.int32 types

* fixed np.int32 json unserializable error in Remotemonitor

* fix RemoteMonitor json to handle np.float32 and np.int32 types

keras/callbacks.py

@@ -546,7 +546,10 @@ def on_epoch_end(self, epoch, logs=None):
         send = {}
         send['epoch'] = epoch
         for k, v in logs.items():
-            send[k] = v
+            if isinstance(v, (np.ndarray, np.generic)):
+                send[k] = v.item()
+            else:
+                send[k] = v
         try:
             requests.post(self.root + self.path,
                           {self.field: json.dumps(send)},