我将展示减少部分代码，这给了我一个问题。

_tkinter.TclError: image "pyimageN" doesn't exist -N停留1、2、3等的地方…

第一类使用背景图像显示菜单。

    class MenuWindow():    #in this class we show the main part of the program
        def __init__(self):
            self.Menu=Tk()
            self.MCanvas=Canvas(self.Menu)
            self.MCanvas.bind("<ButtonPress-1>",self.MenuClick)

            #unuseful lines that configure the window and the canvas#

            self.Background=PhotoImage(height=600,width=700)#a simple tkinter.PhotoImage object

            #other unuseful lines that draw the photoimage ( without reading any file, with the method put())#

            self.MCanvas.create_image((x,y),image=self.Background,state="normal")

            #unuseful lines that continue the drawing of the canvas#

第二类显示另一个窗口，在后台使用另一个图像。此类由第一类通过self.MenuClick函数的单击绑定启动。

    class EditorWindow():    #in this class we show the main part of the program
        def __init__(self):
            self.Eenu=Tk()
            self.ECanvas=Canvas(self.Eenu)

            #unuseful lines that configure the window and the canvas#

            self.Background=PhotoImage(height=600,width=700)

            #other unuseful lines that draw the photoimage ( without reading any file , with the method put() )#

            self.ECanvas.create_image((x,y),image=self.Background,state="normal")#in this line i get the error

            #unuseful lines that continue the drawing of the canvas#

完整的回溯如下：

    Exception in Tkinter callback
    Traceback (most recent call last):
      File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/tkinter/__init__.py", line 1399, in __call__
        return self.func(*args)
      File "/Users/albertoperrella/Desktop/slay.py", line 70, in MenuClick
        EditorWindow(self)
      File "/Users/albertoperrella/Desktop/slay.py", line 85, in __init__
        self.ECanvas.create_image((3,3),image=self.Background,state="normal",anchor="nw")
      File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/tkinter/__init__.py", line 2140, in create_image
        return self._create('image', args, kw)
      File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/tkinter/__init__.py", line 2131, in _create
        *(args + self._options(cnf, kw))))
    _tkinter.TclError: image "pyimage2" doesn't exist

这两个类的制作方法类似，所以我不知道为什么第二个类会出错。我确定这不是写错误，例如（用conttruct代替construct），并且我使用的图像确实存在。

所以我认为：

• 我在概念上犯了一些错误，

• 或它是python中的错误（或Tkinter的细微行为）。