检查在CheckButtons中选择了哪个项目

Question

嗨有一个有3个选项的盒子。我试图知道选择了哪个项目。有没有办法找出哪个项目被选中并记得？因为，我不希望能够同时选择2个项目。我可以检查每个选项的布尔值吗？我认为，如果＆＃39; Mils / sec＆＃39;是真是假......如果点击另一个项目，我可以将其切换为相反。

由于

def func(label): # graph ax2
    global milse2a, milse4a, check
    if label == 'Distance (mils) Pk-Pk':
        if (milse2a == 0):
            milse2a = 1
            print(check.get_active())
            print(check.get())
            print(check.state()) #.state() didn't work
            #check.state(['selected'])
            #print(check.get_active(check.state()))
            #if label == 'Distance (m) Pk-Pk''
            #check = CheckButtons(rax, ('Mils/sec','Distance (mils) Pk-Pk', 'Distance (m) Pk-Pk'), (True, False, False))
            #CheckButt
            print('milse2a', milse2a)
        else:
            milse2a = 0
            print('milse2a', milse2a)
    if label == 'Distance (m) Pk-Pk':
        if (milse2b == 0):
            milse2b = 1
            print('milse2', milse4a)
        else:
            milse4a = 0
            print('milse2', milse4a)

rax = plt.axes([0.15, 0.62, 0.14, 0.045])
    check = CheckButtons(rax, ('Mils/sec','Distance (mils) Pk-Pk', 'Distance (m) Pk-Pk'), (False, False, False))
    enter code here