Debug

Author: ianthomas23

ipykernel/subshell_manager.py

@@ -225,6 +225,7 @@ def _send_on_shell_channel(self, msg) -> None:
         assert current_thread().name == SHELL_CHANNEL_THREAD_NAME
         with self._lock_shell_socket:
             self._shell_socket.send_multipart(msg)
+            self._shell_socket.flush()
 
     def _stop_subshell(self, subshell_thread: SubshellThread) -> None:
         """Stop a subshell thread and close all of its resources."""