upstream/ipython Files · IPython/html/widgets/widget_image.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)

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             widget_image.py
        
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      """ImageWidget class.  

      Represents an image in the frontend using a widget.

      """

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

      # Copyright (c) 2013, the IPython Development Team.

      #

      # Distributed under the terms of the Modified BSD License.

      #

      # The full license is in the file COPYING.txt, distributed with this software.

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

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

      # Imports

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

      import base64

      from .widget import DOMWidget

      from IPython.utils.traitlets import Unicode, CUnicode, Bytes

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

      # Classes

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

      class ImageWidget(DOMWidget):

          _view_name = Unicode('ImageView', sync=True)

          # Define the custom state properties to sync with the front-end

          format = Unicode('png', sync=True)

          width = CUnicode(sync=True)

          height = CUnicode(sync=True)

          _b64value = Unicode(sync=True)

          value = Bytes()

          def _value_changed(self, name, old, new):

              self._b64value = base64.b64encode(new)

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				"""ImageWidget class.

				Represents an image in the frontend using a widget.
				"""
				#-----------------------------------------------------------------------------
				# Copyright (c) 2013, the IPython Development Team.
				#
				# Distributed under the terms of the Modified BSD License.
				#
				# The full license is in the file COPYING.txt, distributed with this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------
				import base64

				from .widget import DOMWidget
				from IPython.utils.traitlets import Unicode, CUnicode, Bytes

				#-----------------------------------------------------------------------------
				# Classes
				#-----------------------------------------------------------------------------
				class ImageWidget(DOMWidget):
				_view_name = Unicode('ImageView', sync=True)

				# Define the custom state properties to sync with the front-end
				format = Unicode('png', sync=True)
				width = CUnicode(sync=True)
				height = CUnicode(sync=True)
				_b64value = Unicode(sync=True)

				value = Bytes()
				def _value_changed(self, name, old, new):
				self._b64value = base64.b64encode(new)