为什么python photoimages不存在？ [英] why python photoimages don't exist?

问题描述

我将显示代码的缩小部分，这给我一个问题。

I will show a reduced portion of the code that gives me a problem.

_ tkinter.TclError：imagepyimageN不存在 - 其中N保留1或2或3等...

"_tkinter.TclError: image "pyimageN" doesn't exist" - where N stays for 1 or 2 or 3 etc...

有一个第一堂课显示在后台使用图片的菜单。

There is a first class that shows a menu using an image in the background.

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#

第二个类显示另一个窗口，在后台使用另一个图像。这个类是由第一个类通过函数self.MenuClick的点击绑定启动的。

And a second class that shows another window, using another image in the background. This class is launched by the first class via click binding of the function self.MenuClick.

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#

完成回溯如下：

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

这两个类是以类似的方式制作的，所以我不知道为什么我会在第二个类中得到错误。我确信这不是写错误，例如（构造而不是构造），并且我正在使用的图像实际存在。

The two classes are made in a similar way, so I don't know why I get the error with the second one. I am sure that it isn't a writing error e.g.(conttruct instead of construct) and that the images I am using actually exist.

所以我认为：

• 我犯了一些概念错误，

• I am making some concept mistakes,

或者它是python中的错误（或TkInter的微妙行为）

or it is a bug (or subtle behaviour of TkInter) in python

推荐答案

我解决了我自己的问题：

I solved myself the problem :

我定义的第二个类是问题因为它使用了另一个根窗口，别名Tk（）。相当于普通的Tk（）窗口是Toplevel（）与root相同但没有自己的解释器上下文。

the second class i defined was the problem cause it used another root window , alias Tk() .an equivalent to the normal Tk() window is the Toplevel() that is the same as a root but hasn't its own interpreter context.

很快，为了解决问题，我必须改变fisrt的编辑器窗口的 init （）方法

shortly , to solve the problem i had to change the fisrt line of the init() method of the EditorWindow class from

        self.Eenu=Tk()

到

        self.Eenu=Toplevel() 

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