Merge pull request #8594 from minrk/missing-payload

allow payload to be undefined in execute_reply

IPython/qt/console/frontend_widget.py

@@ -764,7 +764,7 b' class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):'
     def _process_execute_ok(self, msg):
         """ Process a reply for a successful execution request.
         """
-        payload = msg['content']['payload']
+        payload = msg['content'].get('payload', [])
         for item in payload:
             if not self._process_execute_payload(item):
                 warning = 'Warning: received unknown payload of type %s'

IPython/terminal/console/interactiveshell.py

@@ -205,7 +205,7 b' class ZMQTerminalInteractiveShell(TerminalInteractiveShell):'
                 return
             elif status == 'ok':
                 # handle payloads
-                for item in content["payload"]:
+                for item in content.get('payload', []):
                     source = item['source']
                     if source == 'page':
                         page.page(item['data']['text/plain'])