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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def show():
 """Try showing the most desirable GUI This function cycles through the currently registered graphical user interfaces, if any, and presents it to the user. """


    parent = None
    current = QtWidgets.QApplication.activeWindow()
    while current:
        parent = current
        current = parent.parent()

    window = (_discover_gui() or _show_no_gui)(parent)

    return window