upstream/ipython Files · IPython/external/qt.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)

Chris Beaumont - - Load All Authors

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      """ A Qt API selector that can be used to switch between PyQt and PySide.

      This uses the ETS 4.0 selection pattern of:

      PySide first, PyQt with API v2. second.

      Do not use this if you need PyQt with the old QString/QVariant API.

      """

      import os

      from IPython.external.qt_loaders import (load_qt, QT_API_PYSIDE,

                                               QT_API_PYQT)

      QT_API = os.environ.get('QT_API', None)

      if QT_API not in [QT_API_PYSIDE, QT_API_PYQT, None]:

          raise RuntimeError("Invalid Qt API %r, valid values are: %r, %r" %

                             (QT_API, QT_API_PYSIDE, QT_API_PYQT))

      if QT_API is None:

          api_opts = [QT_API_PYSIDE, QT_API_PYQT]

      else:

          api_opts = [QT_API]

      QtCore, QtGui, QtSvg, QT_API = load_qt(api_opts)

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				""" A Qt API selector that can be used to switch between PyQt and PySide.

				This uses the ETS 4.0 selection pattern of:
				PySide first, PyQt with API v2. second.

				Do not use this if you need PyQt with the old QString/QVariant API.
				"""

				import os

				from IPython.external.qt_loaders import (load_qt, QT_API_PYSIDE,
				QT_API_PYQT)

				QT_API = os.environ.get('QT_API', None)
				if QT_API not in [QT_API_PYSIDE, QT_API_PYQT, None]:
				raise RuntimeError("Invalid Qt API %r, valid values are: %r, %r" %
				(QT_API, QT_API_PYSIDE, QT_API_PYQT))
				if QT_API is None:
				api_opts = [QT_API_PYSIDE, QT_API_PYQT]
				else:
				api_opts = [QT_API]

				QtCore, QtGui, QtSvg, QT_API = load_qt(api_opts)