from .. import import_it from .. import major QtDesigner = import_it("PyQt", "QtDesigner") class RedPlugin(QtDesigner.QPyDesignerCustomWidgetPlugin): # https://wiki.python.org/moin/PyQt/Using_Python_Custom_Widgets_in_Qt_Designer def __init__(self): raise Exception('This exception is being intentionally raised to demonstrate the pyqt{}-tools exception dialog.'.format(major))