Broken IPython example

It seems like the IPython widget is implemented in neither backends. Or is this because I have the wrong version of IPython? In which case the error message is not terribly informative.

parietal ~/dev/enthought/ets/pyface/examples $ python ipython_shell.py

Traceback (most recent call last):

  File "ipython_shell.py", line 51, in 

    window.open()

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/i_window.py", line 145, in open

    self._create()

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/ui/wx/application_window.py", line 150, in _create

    contents = self._create_contents(body)

  File "ipython_shell.py", line 39, in _create_contents

    self._shell = IPythonWidget(parent)

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/toolkit.py", line 92, in __init__

    raise NotImplementedError("the %s pyface backend doesn't implement %s" % (ETSConfig.toolkit, oname))

NotImplementedError: the wx pyface backend doesn't implement IPythonWidget

parietal ~/dev/enthought/ets/pyface/examples $ export ETS_TOOLKIT=qt4

parietal ~/dev/enthought/ets/pyface/examples $ python ipython_shell.py

Traceback (most recent call last):

  File "ipython_shell.py", line 51, in 

    window.open()

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/i_window.py", line 145, in open

    self._create()

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/ui/qt4/application_window.py", line 123, in _create

    contents = self._create_contents(self.control)

  File "ipython_shell.py", line 39, in _create_contents

    self._shell = IPythonWidget(parent)

  File "/home/varoquau/dev/enthought/ets/pyface/pyface/toolkit.py", line 92, in __init__

    raise NotImplementedError("the %s pyface backend doesn't implement %s" % (ETSConfig.toolkit, oname))

NotImplementedError: the qt4 pyface backend doesn't implement IPythonWidget