self.button_Adaptive = QtWidgets.QSizePolicy(
QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding) # 按钮大小自适应
self.button_start = QtWidgets.QPushButton('开始')
self.button_start.setSizePolicy(self.button_Adaptive)
self.button_start.setObjectName('button_start')
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