upstream/ipython Files · IPython/kernel/ioloop/restarter.py

This feature was discussed in , but it doesn't look like anything was ever incorporated into the IPython Notebook....

This feature was discussed in , but it doesn't look like anything was ever incorporated into the IPython Notebook. Here's a brief overview of the changes: - Display of messages from other clients can be toggled on and off from within a notebook, either using the ``<M-m>e`` keyboard shortcut in the web UI, or through the option in the "Kernel" menu. - notebook.js controls whether messages are displayed through a callback that is invoked from kernel.js when no callbacks are available for a message. - The UI displays ``execute_input`` messages originating from an other clients in new cells at the end of the notebook. Output messages (``execute_result`` et al.) will only be displayed if a cell exists with a matching message ID. Pending design questions: - Should each ``execute_input`` message cause a new cell to be created? - Should new cells be placed at the end of the notebook, or elsewhere? If the latter, what criteria should be followed?

Thomas Kluyver - - Load All Authors

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      """A basic in process kernel monitor with autorestarting.

      This watches a kernel's state using KernelManager.is_alive and auto

      restarts the kernel if it dies.

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2013  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      from __future__ import absolute_import

      from zmq.eventloop import ioloop

      from IPython.kernel.restarter import KernelRestarter

      from IPython.utils.traitlets import (

          Instance,

      )

      #-----------------------------------------------------------------------------

      # Code

      #-----------------------------------------------------------------------------

      class IOLoopKernelRestarter(KernelRestarter):

          """Monitor and autorestart a kernel."""

          loop = Instance('zmq.eventloop.ioloop.IOLoop', allow_none=False)

          def _loop_default(self):

              return ioloop.IOLoop.instance()

          _pcallback = None

          def start(self):

              """Start the polling of the kernel."""

              if self._pcallback is None:

                  self._pcallback = ioloop.PeriodicCallback(

                      self.poll, 1000*self.time_to_dead, self.loop

                  )

                  self._pcallback.start()

          def stop(self):

              """Stop the kernel polling."""

              if self._pcallback is not None:

                  self._pcallback.stop()

                  self._pcallback = None

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				"""A basic in process kernel monitor with autorestarting.

				This watches a kernel's state using KernelManager.is_alive and auto
				restarts the kernel if it dies.
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2013 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------

				from __future__ import absolute_import

				from zmq.eventloop import ioloop


				from IPython.kernel.restarter import KernelRestarter
				from IPython.utils.traitlets import (
				Instance,
				)

				#-----------------------------------------------------------------------------
				# Code
				#-----------------------------------------------------------------------------

				class IOLoopKernelRestarter(KernelRestarter):
				"""Monitor and autorestart a kernel."""

				loop = Instance('zmq.eventloop.ioloop.IOLoop', allow_none=False)
				def _loop_default(self):
				return ioloop.IOLoop.instance()

				_pcallback = None

				def start(self):
				"""Start the polling of the kernel."""
				if self._pcallback is None:
				self._pcallback = ioloop.PeriodicCallback(
				self.poll, 1000*self.time_to_dead, self.loop
				)
				self._pcallback.start()

				def stop(self):
				"""Stop the kernel polling."""
				if self._pcallback is not None:
				self._pcallback.stop()
				self._pcallback = None