python - Tkinter 中 Listbox 和 Radiobutton 触发的事件

Question

我想制作一个由列表框所选项目的更改或单选按钮所选项目的更改触发的事件。是否可以？我使用这段代码:

def getScript(event):
    state = rb.get()
    listScript = []
    processor = ()
    processor = lb1.get(lb1.curselection())
    if processor :
        if (state == 1):
            print processor
        if (state == 2):
            pass
        if (state == 3):
            pass


frame2 = Frame(top)
frame2.pack(fill = X)
rb = IntVar()

R1 = Radiobutton(frame2, text = "Parallel Test", 
                 variable = rb, value = 1, command = getScript)
R2 = Radiobutton(frame2, text = "Non Parallel Test", 
                 variable = rb, value = 2, command = getScript)
R3 = Radiobutton(frame2, text = "Specific Test", 
                 variable = rb, value = 3, command = getScript)

R1.grid(row = 0, column = 0, padx = 10)
R2.grid(row = 0, column = 1, padx = 10)
R3.grid(row = 0, column = 2, padx = 10)

frame3 = Frame(top)
frame3.pack(fill = X)
space_frame3 = Frame(frame3, width = 10)
l5 = Label(frame3, text = "Processor Unit")
l6 = Label(frame3, text = "Script for test")
lb1 = Listbox(frame3, height = 7, exportselection = 0)
lb1.bind('<<ListboxSelect>>',getScript)
scrollbar = Scrollbar(frame3)
lb2 = Listbox(frame3, height = 7, width = 40, 
              yscrollcommand = scrollbar.set, exportselection = 0)

只要我在选择列表框中的项目之前选择了单选按钮，一切都会顺利进行。但每次我选择另一个单选按钮时，它都会返回:

TypeError: getScript() takes exactly 1 argument (0 given)

Answer 1

当你选择一个 Radiobutton 时会发生什么:

1) intVar rb 设置为按钮值

2) 命令getScript被调用。

但是，单选按钮选择不会生成任何事件，这就是为什么在这种情况下有 2 个选项:

使用 lambda 函数调用函数以提供参数作为您的命令 getScript 期望一个参数(这是错误消息)。

R1 = Radiobutton(frame2, text = "Parallel Test",
                 variable = rb, value = 1,
                 command = lambda : getScript(None) )

另一种选择是 - 因为您的目标似乎是知道选择了哪个小部件 - 使用这样的命令:

R1 = Radiobutton(frame2, text = "Parallel Test",
                 variable = rb, value = 1,
                 command = lambda : getScript(R1) )

使用带有小部件的 getSript 函数。像这样:

def getSript(widget):
    print widget["text"]