Switching Frames in Tkinter

Question

I've come across this great tutorial - https://www.youtube.com/watch?v=jBUpjijYtCk&index=4&list=PLQVvvaa0QuDclKx-QpC9wntnURXVJqLyk

its part 3, its essentially just about being able to swap out frames with the press of a button. I've pretty much followed all the steps and everything works up until about 7.06

here is the code -

import Tkinter as tk

class MainApp(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 = {}

        for F in (StartPage,PageOne):

            frame = F(container,self)

            self.frames[F] = frame

            frame.grid(row = 0, column = 0, sticky = "w")

        self.show_frame(StartPage)

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

class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)

        lbl = tk.Label(self, text = "Start Page", font =("Helvetica",12,"bold"))
        lbl.pack()

        btn = tk.Button(self,text = "Button to next frame", font = ("Helvetica",12,"bold")
                    ,command =lambda: controller.show_frame(PageOne))
    btn.pack()

class PageOne(tk.Frame):
    def __int__(self,parent,controller):
        tk.Frame.__init__(self,parent)

        lbl = tk.Label(self, text = "page 1", font =("Helvetica",12,"bold"))
        lbl.pack()

        btn1 = tk.Button(self,text = "Button to pageOne", font = ("Helvetica",12,"bold")
                    ,command =lambda: controller.show_frame(StartPage))
        btn1.pack()


app = MainApp()
app.mainloop()

an error is thrown when I implement the loop -

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 2090, in __init__
(widgetName, self._w) + extra + self._options(cnf))
_tkinter.TclError: unknown option "-use"

I've scrutinised the code pretty carefully and can't see any differences so I'm not entirely sure what it means or why its comes up? or why the same thing doesn't happen in the video, any ideas?

this code doesn't work with `NameError: name 'btn' is not defined`, and also `Tkinter` should be `tkinter`. You sure you're on python 3x? — Wayne Werner, Apr 01 '16 at 15:49
I have 8.6.4 installed on arch linux and am getting the same error — Wayne Werner, Apr 01 '16 at 15:51
@WayneWerner: nope, it has nothing to do with versions of python or tkinter. — Bryan Oakley, Apr 01 '16 at 16:12
thanks for taking the time to look at it, unfortunately it was an error of my own doing. "__int__" rather that "__init__" on the PageOne class — Treeno1, Apr 01 '16 at 18:34
Possible duplicate of [Switch between two frames in tkinter](https://stackoverflow.com/questions/7546050/switch-between-two-frames-in-tkinter) — Stevoisiak, Apr 12 '18 at 19:38

score 0 · Accepted Answer · edited May 23 '17 at 12:15

0

You've misspelled __init__ to be __int__ in PageOne, which means that the default __init__ is being run. The default __init__ method's second parameter is use rather than controller, which is why you get that particular error.

By the way, the code in that tutorial originated in a stackoverflow answer and then copied by the creator of that tutorial. You might find the original answer and some related answers useful:

https://stackoverflow.com/a/7557028/7432

edited May 23 '17 at 12:15

Community

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answered Apr 01 '16 at 16:06

Bryan Oakley

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I obviously didn't scrutinise it close enough! feel like a muppet haha. thanks for the help! – Treeno1 Apr 01 '16 at 18:26

Switching Frames in Tkinter

1 Answers1