PyQt5 QButtonGroup QCheckBox的互斥

	def set_turn_speed(self):
		cb_group = QButtonGroup()
		self.cb_speed1.setCheckable(True)
		self.cb_speed2.setCheckable(True)
		cb_group.addButton(self.cb_speed1, 0)
		cb_group.addButton(self.cb_speed2, 1)
		cb_group.setExclusive(True)         # 设置button互斥
		self.cb_speed1.clicked.connect(self.set_speed1)
		self.cb_speed2.clicked.connect(self.set_speed2)

	def set_speed1(self):
		global speed
		self.cb_speed1.setChecked(True)
		self.cb_speed2.setChecked(False)
		speed = int(46)

	def set_speed2(self):
		global speed
		self.cb_speed2.setChecked(True)
		self.cb_speed1.setChecked(False)
		speed = int(63)

在窗口中可能有几个选择，但只能单选，因此可以使用QButtonGroup和QCheckBox来实现，比如有一个全局变量，选择1的时候写一个值，选择2的时候写另一个值。