Handle traceback generated by a KeyboardInterrupt when stopping the server (Spyder case)

Author: dalthviz

vpython/no_notebook.py

@@ -22,6 +22,31 @@
 from .rate_control import rate
 
 
+# Redefine `Thread.run` to not show a traceback for Spyder when stopping
+# the server by raising a KeyboardInterrupt or SystemExit.
+if _in_spyder:
+    def install_thread_stopped_message():
+        """
+        Workaround to prevent showing a traceback when VPython server stops.
+
+        See:
+        https://bugs.python.org/issue1230540
+        """
+        run_old = threading.Thread.run
+
+        def run(*args, **kwargs):
+            try:
+                run_old(*args, **kwargs)
+            except (KeyboardInterrupt, SystemExit):
+                print("VPython server stopped.")
+            except:
+                raise
+        threading.Thread.run = run
+
+    install_thread_stopped_message()
+
+
+
 # Check for Ctrl+C. SIGINT will also be sent by our code if WServer is closed.
 def signal_handler(signal, frame):
     stop_server()