[Fix] Support update np.ScalarType data in message_hub (#898)

* Clean the commit history

* Update message_hub.py

---------

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

mmengine/logging/message_hub.py

@@ -314,17 +314,19 @@ class MessageHub(ManagerMixin):
         return self._runtime_info[key]
 
     def _get_valid_value(
-            self, value: Union['torch.Tensor', np.ndarray, int, float]) \
-            -> Union[int, float]:
+        self,
+        value: Union['torch.Tensor', np.ndarray, np.number, int, float],
+    ) -> Union[int, float]:
         """Convert value to python built-in type.
 
         Args:
-            value (torch.Tensor or np.ndarray or int or float): value of log.
+            value (torch.Tensor or np.ndarray or np.number or int or float):
+                value of log.
 
         Returns:
             float or int: python built-in type value.
         """
-        if isinstance(value, np.ndarray):
+        if isinstance(value, (np.ndarray, np.number)):
             assert value.size == 1
             value = value.item()
         elif isinstance(value, (int, float)):

tests/test_logging/test_message_hub.py

@@ -34,14 +34,18 @@ class TestMessageHub:
 
     def test_update_scalar(self):
         message_hub = MessageHub.get_instance('mmengine')
-        # test create target `HistoryBuffer` by name
+        # Update scalar with int.
         message_hub.update_scalar('name', 1)
         log_buffer = message_hub.log_scalars['name']
         assert (log_buffer._log_history == np.array([1])).all()
-        # test update target `HistoryBuffer` by name
-        message_hub.update_scalar('name', 1)
+
+        # Update scalar with np.ndarray.
+        message_hub.update_scalar('name', np.array(1))
         assert (log_buffer._log_history == np.array([1, 1])).all()
-        # unmatched string will raise a key error
+
+        # Update scalar with np.int
+        message_hub.update_scalar('name', np.int32(1))
+        assert (log_buffer._log_history == np.array([1, 1, 1])).all()
 
     def test_update_info(self):
         message_hub = MessageHub.get_instance('mmengine')