[python] handle exceptions if they are raised by children in variable…

…s pane (#2752)

* don't time out if error

* log error but have generic output

extensions/positron-python/python_files/positron/positron_ipykernel/inspectors.py

@@ -232,7 +232,13 @@ def get_length(self) -> int:
         return len([p for p in dir(self.value) if not (p.startswith("_"))])
 
     def get_child(self, key: str) -> Any:
-        return getattr(self.value, key)
+        if isinstance(self.value, property):
+            pass
+        try:
+            return getattr(self.value, key)
+        except Exception as e:
+            logger.warning(msg=f"{type(e).__name__}: {e}")
+            return "Unable to show value."
 
     def get_items(self) -> Iterable[Tuple[str, Any]]:
         for key in dir(self.value):