Pyqt5 button按键大小自适应

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')