Add debug statements to observe loop

IPython/terminal/pt_inputhooks/qt.py

@@ -20,6 +20,9 b' def _reclaim_excepthook():'
         sys.excepthook = shell.excepthook
 
 
+announced = 0
+
+
 def inputhook(context):
     global _appref
     app = QtCore.QCoreApplication.instance()
@@ -57,6 +60,15 b' def inputhook(context):'
 
     event_loop = QtCore.QEventLoop(app)
 
+    global announced
+    if announced == 0:
+        print(f"`inputhook` running Qt {QtCore.qVersion()} event loop.")
+        announced += 1
+    elif announced == 10:
+        announced = 0
+    else:
+        announced += 1
+
     if sys.platform == 'win32':
         # The QSocketNotifier method doesn't appear to work on Windows.
         # Use polling instead.