Python Tkinter实例没有属性'tk'

Question

AttributeError:MyGUI实例没有属性'tk'

另外,如何使创建的窗口具有固定的大小,并且无法使用鼠标调整大小？或者通过单击按钮更改标签值.

我的代码:

from Tkinter import*

class MyGUI(Frame):

    def __init__(self):
        self.__mainWindow = Tk()    

    #lbl
        self.labelText = 'label message'
        self.depositLabel = Label(self.__mainWindow, text = self.labelText)

    #buttons
        self.hi_there = Button(self.__mainWindow)
        self.hi_there["text"] = "Hello",
        self.hi_there["command"] = self.testeo

        self.QUIT = Button(self.__mainWindow)
        self.QUIT["text"] = "QUIT"
        self.QUIT["fg"]   = "red"
        self.QUIT["command"] =  self.quit

    #place on view
        self.depositLabel.pack()
        self.hi_there.pack() #placed in order!
        self.QUIT.pack()

    #What does it do?
        mainloop()

    def testeo(self):

        self.depositLabel['text'] = 'c2value'

        print "testeo"

    def depositCallBack(self,event):
        self.labelText = 'change the value'
        print(self.labelText)
        self.depositLabel['text'] = 'change the value'

myGUI = MyGUI()

怎么了？谢谢

Answer 1

你应该调用超级构造函数Frame.不确定,但我猜这会设置命令依赖的tk属性quit.之后,无需创建自己的Tk()实例.

def __init__(self):
    Frame.__init__(self)
    # self.__mainWindow = Tk()

当然,您还必须相应地更改小部件的构造函数调用,例如,

self.hi_there = Button(self)  # self, not self.__mainWindow

或更好(或至少更短):直接在构造函数中设置所有属性:

self.hi_there = Button(self, text="Hello", command=self.testeo)

还要添加self.pack()到构造函数中.

(或者,您可以将quit命令更改为self.__mainWindow.quit,但我认为以上是创建框架的更好样式,请参阅此处.)