upstream/ipython Files · IPython/qt/client.py

Shut down kernels in parallel...

Shut down kernels in parallel When stopping the notebook server, it currently sends a shutdown request to each kernel and then waits for the process to finish. This can be slow if you have several kernels running. This makes it issues all the shutdown requests before waiting on the processes, so shutdown happens in parallel. KernelManager (and MultiKernelManager) gain three new public API methods to allow this: * request_shutdown (promoted from a private method) * wait_shutdown (refactored out of shutdown_kernel) * cleanup (refactored out of shutdown_kernel)

Fernando Perez - - Load All Authors

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      """ Defines a KernelClient that provides signals and slots.

      """

      # Local imports

      from IPython.utils.traitlets import Type

      from IPython.kernel.channels import (

          ShellChannel, IOPubChannel, StdInChannel, HBChannel

      )

      from IPython.kernel import KernelClient

      from .kernel_mixins import (

          QtShellChannelMixin, QtIOPubChannelMixin,

          QtStdInChannelMixin, QtHBChannelMixin,

          QtKernelClientMixin

      )

      class QtShellChannel(QtShellChannelMixin, ShellChannel):

          pass

      class QtIOPubChannel(QtIOPubChannelMixin, IOPubChannel):

          pass

      class QtStdInChannel(QtStdInChannelMixin, StdInChannel):

          pass

      class QtHBChannel(QtHBChannelMixin, HBChannel):

          pass

      class QtKernelClient(QtKernelClientMixin, KernelClient):

          """ A KernelClient that provides signals and slots.

          """

          iopub_channel_class = Type(QtIOPubChannel)

          shell_channel_class = Type(QtShellChannel)

          stdin_channel_class = Type(QtStdInChannel)

          hb_channel_class = Type(QtHBChannel)

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				""" Defines a KernelClient that provides signals and slots.
				"""

				# Local imports
				from IPython.utils.traitlets import Type
				from IPython.kernel.channels import (
				ShellChannel, IOPubChannel, StdInChannel, HBChannel
				)
				from IPython.kernel import KernelClient

				from .kernel_mixins import (
				QtShellChannelMixin, QtIOPubChannelMixin,
				QtStdInChannelMixin, QtHBChannelMixin,
				QtKernelClientMixin
				)

				class QtShellChannel(QtShellChannelMixin, ShellChannel):
				pass

				class QtIOPubChannel(QtIOPubChannelMixin, IOPubChannel):
				pass

				class QtStdInChannel(QtStdInChannelMixin, StdInChannel):
				pass

				class QtHBChannel(QtHBChannelMixin, HBChannel):
				pass


				class QtKernelClient(QtKernelClientMixin, KernelClient):
				""" A KernelClient that provides signals and slots.
				"""

				iopub_channel_class = Type(QtIOPubChannel)
				shell_channel_class = Type(QtShellChannel)
				stdin_channel_class = Type(QtStdInChannel)
				hb_channel_class = Type(QtHBChannel)