From 8768212e2f10ebffd0118d79eebfcc6f8debb6b2 2019-11-30 16:50:46
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2019-11-30 16:50:46
Subject: [PATCH] Handle case where the shell does not have arbitrary mimerenderer handler.

That can be the case in test-suites; for example bokeh

Closes #11976

---

diff --git a/IPython/core/displaypub.py b/IPython/core/displaypub.py
index d769692..f651a2a 100644
--- a/IPython/core/displaypub.py
+++ b/IPython/core/displaypub.py
@@ -105,7 +105,7 @@ class DisplayPublisher(Configurable):
 
         handlers = {}
         if self.shell is not None:
-            handlers = self.shell.mime_renderers
+            handlers = getattr(self.shell, 'mime_renderers', {})
 
         for mime, handler in handlers.items():
             if mime in data: