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

Remove 5s wait on inactivity on GUI inputhook loops...

Remove 5s wait on inactivity on GUI inputhook loops The 5s (and 1s) waits were originally added in commit 5074878, but the 5 second wait meant if you left the console for 5+ minutes idle, it would take up to 5 seconds for a response to a keypress. This tradeoff of CPU cycles for battery life seems too far. Note that commit 5074878 was originally for wx, glut and pyglet are based on the wx version and came into existence after commit 5074878.

Thomas Kluyver - - Load All Authors

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             restarter.py
        
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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