我收到此错误 -

KeyError: <class '__main__.PublishPage'>

这是我的代码 -

p = 0
#N,python,python-3.x,user-interface,tkinter"/>
	














    

		

        

            
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首页  > 解决方案 > 我收到 KeyError：

我收到此错误 -



KeyError: <class '__main__.PublishPage'>




这是我的代码 -



p = 0
#N












python - 我收到 KeyError：

我收到此错误 -



KeyError: <class '__main__.PublishPage'>




这是我的代码 -



p = 0
#N






问题描述



我收到此错误 -



KeyError: <class '__main__.PublishPage'>




这是我的代码 -



p = 0
#Now, Adding the different pages for the game
class HeadlineGame(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        frame = StartPage(container, self)
        self.frames[StartPage] = frame

        frame.grid(row=0, column=0, sticky="nsew")
        self.show_frame(StartPage)

    def show_frame(self, controller):
        frame = self.frames[controller]
        frame.tkraise()

class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        publishbutton = tk.Button(self, image=publishimg, borderwidth=0, command= lambda: controller.show_frame(PublishPage))
        publishbutton.image = publishimg
        publishbutton.place(x=503, y=315)

class PublishPage(tk.Frame):
        def __init__(self, parent, controller):
         button2 = tk.Button(self, text="Test")
         button2.grid(row=0, column=0)



app = HeadlineGame()
app.geometry('1366x768')
app.mainloop()




我试图解决这个问题，但无济于事。这是 lambda 命令的问题吗？我想要它，以便当我按下按钮时，它会将我带到第二帧，即使这个特定问题无法解决，有没有办法实现这一点？



谢谢你。



编辑回溯错误：



> Exception in Tkinter callback Traceback (most recent call last):   File
> "C:\Users\DELL\AppData\Local\Programs\Python\Python38-32\lib\tkinter\__init__.py",
> line 1883, in __call__
>     return self.func(*args)   File "C:\Users\DELL\Desktop\Python\intro.py", line 276, in <lambda>
>     publishbutton = tk.Button(self, image=publishimg, borderwidth=0, command= lambda: controller.show_frame(PublishPage))   File
> "C:\Users\DELL\Desktop\Python\intro.py", line 197, in show_frame
>     frame = self.frames[controller] KeyError: <class '__main__.PublishPage'>











我建议重构这样的东西。show_frame()现在将负责根据请求实例化一个新框架；你不必管理self.frames自己。



class HeadlineGame(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        self.container = container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}
        self.show_frame(StartPage)

    def show_frame(self, controller):
        if controller not in self.frames:
            self.frames[controller] = frame = controller(self.container, self)
            frame.grid(row=0, column=0, sticky="nsew")
        frame = self.frames[controller]
        frame.tkraise()


class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        publishbutton = tk.Button(
            self, image=publishimg, borderwidth=0, command=lambda: controller.show_frame(PublishPage)
        )
        publishbutton.image = publishimg
        publishbutton.place(x=503, y=315)


class PublishPage(tk.Frame):
    def __init__(self, parent, controller):
        button2 = tk.Button(self, text="Test")
        button2.grid(row=0, column=0)


app = HeadlineGame()
app.geometry("1366x768")
app.mainloop()



标签： pythonpython-3.xuser-interfacetkinter


解决方案









我建议重构这样的东西。show_frame()现在将负责根据请求实例化一个新框架；你不必管理self.frames自己。



class HeadlineGame(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        self.container = container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}
        self.show_frame(StartPage)

    def show_frame(self, controller):
        if controller not in self.frames:
            self.frames[controller] = frame = controller(self.container, self)
            frame.grid(row=0, column=0, sticky="nsew")
        frame = self.frames[controller]
        frame.tkraise()


class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        publishbutton = tk.Button(
            self, image=publishimg, borderwidth=0, command=lambda: controller.show_frame(PublishPage)
        )
        publishbutton.image = publishimg
        publishbutton.place(x=503, y=315)


class PublishPage(tk.Frame):
    def __init__(self, parent, controller):
        button2 = tk.Button(self, text="Test")
        button2.grid(row=0, column=0)


app = HeadlineGame()
app.geometry("1366x768")
app.mainloop()











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