ipython_kernel example broken with IPython4

[jonathanrocher]

When trying to open the ipython kernel view from the example app, while having ipython4 installed, I get an error while trying to read a security file:

---------------------------------------------------------------------------
IOError                                   Traceback (most recent call last)
/home/jrocher/Projects/ETS_source/pyface/pyface/ui/qt4/action/action_item.pyc in _qt4_on_triggered(self=<pyface.ui.qt4.action.action_item._MenuItem object>)
    161 
    162             else:
--> 163                 self.controller.perform(action, action_event)
        self.controller.perform = <bound method TaskActionController.perform of <pyface.tasks.action.task_action_controller.TaskActionController object at 0x7f97466604d0>>
        action = <envisage.plugins.ipython_kernel.actions.StartQtConsoleAction object at 0x7f9746660710>
        action_event = <pyface.action.action_event.ActionEvent object at 0x7f972ad7b0b0>
    164 
    165         else:

/home/jrocher/Projects/ETS_source/pyface/pyface/tasks/action/task_action_controller.pyc in perform(self=<pyface.tasks.action.task_action_controller.TaskActionController object>, action=<envisage.plugins.ipython_kernel.actions.StartQtConsoleAction object>, event=<pyface.action.action_event.ActionEvent object>)
     29         """
     30         event.task = self.task
---> 31         return action.perform(event)
        action.perform = <bound method StartQtConsoleAction.perform of <envisage.plugins.ipython_kernel.actions.StartQtConsoleAction object at 0x7f9746660710>>
        event = <pyface.action.action_event.ActionEvent object at 0x7f972ad7b0b0>
     32 
     33     def add_to_menu(self, item):

/home/jrocher/Projects/ETS_source/envisage/envisage/plugins/ipython_kernel/actions.pyc in perform(self=<envisage.plugins.ipython_kernel.actions.StartQtConsoleAction object>, event=<pyface.action.action_event.ActionEvent object>)
     16 
     17     def perform(self, event=None):
---> 18         self.kernel.new_qt_console()
        self.kernel.new_qt_console = <bound method InternalIPKernel.new_qt_console of <envisage.plugins.ipython_kernel.internal_ipkernel.InternalIPKernel object at 0x7f97466605f0>>

/home/jrocher/Projects/ETS_source/envisage/envisage/plugins/ipython_kernel/internal_ipkernel.pyc in new_qt_console(self=<envisage.plugins.ipython_kernel.internal_ipkernel.InternalIPKernel object>)
     71         console = connect_qtconsole(
     72             self.ipkernel.connection_file, profile=self.ipkernel.profile,
---> 73             argv=['--no-confirm-exit'],
        global argv = undefined
     74         )
     75         self.consoles.append(console)

/home/jrocher/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/ipykernel/connect.pyc in connect_qtconsole(connection_file=u'kernel-27690.json', argv=['--no-confirm-exit'], profile=u'default')
    160         cf = get_connection_file()
    161     else:
--> 162         cf = find_connection_file(connection_file, profile=profile)
        cf = undefined
        global find_connection_file = <function find_connection_file at 0x7f9747a16b18>
        connection_file = u'kernel-27690.json'
        profile = u'default'
    163 
    164     cmd = ';'.join([

/home/jrocher/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/ipykernel/connect.pyc in find_connection_file(filename=u'kernel-27690.json', profile=u'default')
     83     security_dir = profile_dir.security_dir
     84     
---> 85     return jupyter_client.find_connection_file(filename, path=['.', security_dir])
        global jupyter_client.find_connection_file = <function find_connection_file at 0x7f974834aa28>
        filename = u'kernel-27690.json'
        global path = undefined
        security_dir = u'/home/jrocher/.ipython/profile_default/security'
     86 
     87 

/home/jrocher/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/jupyter_client/connect.pyc in find_connection_file(filename=u'kernel-27690.json', path=['.', u'/home/jrocher/.ipython/profile_default/security'], profile=None)
    183     
    184     if not matches:
--> 185         raise IOError("Could not find %r in %r" % (filename, path))
        global IOError = undefined
        filename = u'kernel-27690.json'
        path = ['.', u'/home/jrocher/.ipython/profile_default/security']
    186     elif len(matches) == 1:
    187         return matches[0]

IOError: Could not find u'kernel-27690.json' in ['.', u'/home/jrocher/.ipython/profile_default/security']

FYI, there are some warnings when starting the example:

$ python example.py 
DEBUG:envisage.application:---------- application starting ----------
DEBUG:envisage.plugin_manager:plugin envisage.core starting
DEBUG:envisage.provider_extension_registry:extensions to <envisage.preferences> <[[], [], [], [], []]>
DEBUG:apptools.preferences.preferences:loading preferences from </home/jrocher/.enthought/example.ipython_kernel/preferences.ini>
DEBUG:envisage.provider_extension_registry:extensions to <envisage.class_load_hooks> <[[], [], [], [], []]>
DEBUG:envisage.provider_extension_registry:extensions to <envisage.categories> <[[], [], [], [], []]>
DEBUG:envisage.provider_extension_registry:extensions to <envisage.service_offers> <[[], [], [<envisage.service_offer.ServiceOffer object at 0x7f974ae72290>], [], [<envisage.service_offer.ServiceOffer object at 0x7f974ae724d0>]]>
DEBUG:envisage.service_registry:service <1> registered envisage.plugins.ipython_kernel.internal_ipkernel.InternalIPKernel
DEBUG:envisage.service_registry:service <2> registered envisage.ui.tasks.preferences_dialog.PreferencesDialog
DEBUG:envisage.plugin_manager:plugin envisage.core started
DEBUG:envisage.plugin_manager:plugin example.plugins.ipython_kernel starting
DEBUG:envisage.plugin_manager:plugin example.plugins.ipython_kernel started
DEBUG:envisage.plugin_manager:plugin envisage.plugins.ipython_kernel starting
DEBUG:envisage.plugin_manager:plugin envisage.plugins.ipython_kernel started
DEBUG:envisage.plugin_manager:plugin envisage.plugins.ipython_kernel_ui starting
DEBUG:envisage.plugin_manager:plugin envisage.plugins.ipython_kernel_ui started
DEBUG:envisage.plugin_manager:plugin envisage.ui.tasks starting
DEBUG:envisage.plugin_manager:plugin envisage.ui.tasks started
DEBUG:envisage.application:---------- application started ----------
DEBUG:envisage.ui.tasks.tasks_application:Tasks state location is /home/jrocher/.enthought/example.ipython_kernel/tasks/qt4
Default tasks
DEBUG:envisage.provider_extension_registry:extensions to <envisage.ui.tasks.tasks> <[[], [<envisage.ui.tasks.task_factory.TaskFactory object at 0x7f974ae9a890>], [], [], []]>
/home/jrocher/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
DEBUG:envisage.provider_extension_registry:extensions to <envisage.ui.tasks.task_extensions> <[[], [], [], [<envisage.ui.tasks.task_extension.TaskExtension object at 0x7f9747989230>], [<envisage.ui.tasks.task_extension.TaskExtension object at 0x7f97479895f0>]]>
DEBUG:envisage.provider_extension_registry:extensions to <ipython_plugin.namespace> <[[], [('app', <__main__.ExampleApplication object at 0x7f974ae9a590>)], [], [], []]>
NOTE: When using the `ipython kernel` entry point, Ctrl-C will not work.

To exit, you will have to explicitly quit this process, by either sending
"quit" from a client, or using Ctrl-\ in UNIX-like environments.

To read more about this, see https://github.com/ipython/ipython/issues/2049


To connect another client to this kernel, use:
    --existing kernel-27690.json
INFO:__main__:APPLICATION INITIALIZED

[jonathanrocher]

I found a couple of ways to avoid the issue (not claiming they are the best):

1. downgrade ipython to version 2.4.
2. don't pass any connection file or profile to the connect_qtconsole function in (or comment out) https://github.com/enthought/envisage/blob/master/envisage/plugins/ipython_kernel/internal_ipkernel.py#L72 .