page_dumb mime bundle

IPython/core/page.py

@@ -56,8 +56,10 b' def page_dumb(strng, start=0, screen_lines=25):'
     """Very dumb 'pager' in Python, for when nothing else works.
 
     Only moves forward, same interface as page(), except for pager_cmd and
-    mode."""
-
+    mode.
+    """
+    if isinstance(strng, dict):
+        strng = strng.get('text/plain', '')
     out_ln  = strng.splitlines()[start:]
     screens = chop(out_ln,screen_lines-1)
     if len(screens) == 1: