Widget Display logic

IPython/core/display.py

@@ -24,7 +24,6 b' import struct'
 
 from IPython.utils.py3compat import (string_types, cast_bytes_py2, cast_unicode,
                                      unicode_type)
-from IPython.html.widgets import Widget
 
 from .displaypub import publish_display_data
 
@@ -111,15 +110,16 b' def display(*objs, **kwargs):'
 
     from IPython.core.interactiveshell import InteractiveShell
 
-    if isinstance(obj, Widget):
+    if not raw:
+        format = InteractiveShell.instance().display_formatter.format
+
+    for obj in objs:
+        if hasattr(obj, '_repr_widget_'):
         obj._repr_widget_(**kwargs)
     else:
         if raw:
-            for obj in objs:
                 publish_display_data('display', obj, metadata)
         else:
-            format = InteractiveShell.instance().display_formatter.format
-            for obj in objs:
                 format_dict, md_dict = format(obj, include=include, exclude=exclude)
                 if metadata:
                     # kwarg-specified metadata gets precedence

IPython/core/displayhook.py

@@ -241,6 +241,9 b' class DisplayHook(Configurable):'
         """
         self.check_for_underscore()
         if result is not None and not self.quiet():
+            if hasattr(result, '_repr_widget_'):
+                result._repr_widget_()
+            else:
             self.start_displayhook()
             self.write_output_prompt()
             format_dict, md_dict = self.compute_format_data(result)