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import sys
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from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QGraphicsOpacityEffect, QPushButton, QGridLayout
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class MAIN(QMainWindow):
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    def __init__(self):
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        super(MAIN, self).__init__()
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        widget = QWidget()
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        layout = QGridLayout()
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        widget.setLayout(layout)
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        self.QPushButton_Test1 = QPushButton("test1")
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        layout.addWidget(self.QPushButton_Test1, 0, 0, 1, 1)
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        self.QPushButton_Test2 = QPushButton("test2")
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        layout.addWidget(self.QPushButton_Test2, 1, 0, 1, 1)
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        self.QPushButton_Test3 = QPushButton("test3")
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        layout.addWidget(self.QPushButton_Test3, 2, 0, 1, 1)
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        # TODO: 设置控件不透明度
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        opacity1 = QGraphicsOpacityEffect()
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        opacity1.setOpacity(0.5)  # 透明度 0~1
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        self.QPushButton_Test2.setGraphicsEffect(opacity1)
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        self.QPushButton_Test2.setAutoFillBackground(True)
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        opacity2 = QGraphicsOpacityEffect()
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        opacity2.setOpacity(0)  # 透明度 0~1
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        self.QPushButton_Test3.setGraphicsEffect(opacity2)
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        self.QPushButton_Test3.setAutoFillBackground(True)
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        self.setCentralWidget(widget)
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def main():
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    app = QApplication(sys.argv)
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    Main = MAIN()
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    Main.show()
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    sys.exit(app.exec_())
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    return
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if __name__ == "__main__":
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    main()