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

Switch correctly to the user's default matplotlib backend after inline....

Switch correctly to the user's default matplotlib backend after inline. If '%matplotlib inline' was called first, we'd incorrectly revert to inline when plain '%matplotlib' was called, instead of loading the user's default GUI. If the user called '%matplotlib' first (without 'inline') it worked correctly, but not in the other order. The fix is to read the backend from the original defaults, not from the runtime data structure.

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)