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

Make traitlets notify check more robust against classes redefining equality and bool...

Make traitlets notify check more robust against classes redefining equality and bool Before this change, numpy arrays caused problems since comparing two numpy arrays returns an array of truth values, rather than a single truth value. This change guards against redefining the semantics of comparison by notifying on a trait change if the equality comparison returns anything other than an explicit True value.

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)