由python Tkinter中的Listbox和单选按钮触发的事件

时间:2014-10-13 05:58:31

标签: python listbox tkinter radio-button eventhandler

我想创建一个事件,该事件由列表框选中项目的更改或单选按钮所选项目的更改触发。可能吗?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一个单选按钮,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)

1 个答案:

答案 0 :(得分:3)

选择Radiobutton时会发生什么:

1)intVar rb设置为按钮值

2)调用getScript命令。

但是,Radiobutton选择不会产生任何事件,这就是为什么在这种情况下有2个选项:

使用lambda函数调用函数来提供参数,因为命令getScript需要一个参数(这是错误消息)。

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

另一个选择是 - 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"]