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#pyqt窗口必须在QApplication方法中使用, #要不然会报错 QWidget: Must construct a QApplication before a QWidget. windows = mywindow() # 生成过一个实例(对象), windows是实例(对象)的名字,可以随便起! # mywindows()是我们上面自定义的类. windows.show() ................
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