不确定我的代码有什么问题（Tkinter BEGINNER）

Question

I'm making a pretty simple GUI and each frame should have a Continue and Exit button. I need the continue button to open a new frame with writing, widgets...etc on it.

The first frame ( frame1 ) works when I call the frame_2 function.
But from this I do not know how to open a frame_3 and destroy frame 2 properly.

Here is the code so far:

import tkinter
from tkinter.constants import *
tk = tkinter.Tk()


def frame_2(): #ENTERING AGE
    frame1.grid_forget()
    frame1.destroy()
    frame2 = tkinter.Frame(tk, borderwidth=2,)
    frame2.pack(fill=BOTH,expand=1,pady=50,padx=80)

    need_info = tkinter.Label(frame2, text="I need some information first...")
   need_info.grid(row=0, column=0) #displays text at top of frame

    enter_age = tkinter.Label(frame2, text="Please enter your age!")
    enter_age.grid(row=2, column=0) #displays second line of text

    age = tkinter.Entry(frame2, width=10)
    age.grid(row=3, column=0)

    nextpage = tkinter.Button(frame2,text="Continue",command=frame2.destroy)
    nextpage.grid(row=10, column=0)
    exitapp = tkinter.Button(frame2,text="Exit",command=tk.destroy) #exits programme
    exitapp.grid(row=12, column=0)


def frame_three(): #ENTERING EDUCATION
    frame_2().grid.forget()
    frame_2().destroy()
    frame3 = tkinter.Frame(tk, borderwidth=2)
    frame3.pack(fill=BOTH,expand=1,pady=50,padx=80)

def frame_3(): #ENTERING EDUCATION
    frame_2().grid.forget()
    frame_2().destroy()
    frame3 = tkinter.Frame(tk, borderwidth=2)
    frame3.pack(fill=BOTH,expand=1,pady=50,padx=80)
    age_confirm = tkinter.Label(frame3, text="You entered 38!")
    age_confirm.grid(row=0, column=0)
    nextpage.grid(row=10, column=0)
    exitapp = tkinter.Button(frame2,text="Exit",command=tk.destroy) #exits programme
    exitapp.grid(row=12, column=0)





frame1 = tkinter.Frame(tk, borderwidth=2) #WELCOME PAGE, a.k.a The first frame
frame1.pack(fill=BOTH,expand=1,pady=50,padx=80)
label = tkinter.Label(frame1, text="Welcome to NAME GAME! I'm going to guess who you are...")
label.grid(row=0, column=0) #displays text at top of frame


nextpage = tkinter.Button(frame1,text="Continue",command=frame_2)

def frame_2(): #ENTERING AGE
    frame1.grid_forget()
    frame1.destroy()
    frame2 = tkinter.Frame(tk, borderwidth=2,)
    frame2.pack(fill=BOTH,expand=1,pady=50,padx=80)

    need_info = tkinter.Label(frame2, text="I need some information first...")
    need_info.grid(row=0, column=0) #displays text at top of frame

    enter_age = tkinter.Label(frame2, text="Please enter your age!")
    enter_age.grid(row=2, column=0) #displays second line of text

    age = tkinter.Entry(frame2, width=10)
    age.grid(row=3, column=0)

    nextpage = tkinter.Button(frame2,text="Continue",command=frame_3)
    nextpage.grid(row=10, column=0)
    exitapp = tkinter.Button(frame2,text="Exit",command=tk.destroy) #exits programme
    exitapp.grid(row=12, column=0)

nextpage.grid(row=2, column=0)
exitapp = tkinter.Button(frame1,text="Exit",command=tk.destroy) #exits programme
exitapp.grid(row=4, column=0)



tk.mainloop()

Answer 1

Your code is a bit messed up. Find below a working example. Before you post any other question, make sure that your code is "runable", if you are struggling with logical issues or post your error messages (the errors printed in python console).

Please also make sure that your indentation is correct.

As I am using python 2.7 you would need to replace Tkinter by tkinter . May be that you need to import BOTH from tkinter.constants again.

What was wrong in your code?

• You used similar names for objects and functions. What came around doing this was that you tried frame_2().grid.forget() - what is wrong about it? You would need to call something on a function call ( frame_2() ) instead of an object ( frame2 ). This object was also not declared as global so no chance to get a hold of the object you wanted but declaring it globally. (Including initialization and usage) What else is wrong about that line? The function is called grid_forget and not forget on the grid object that is part of your "function call object"
• Second thing: you used the same function name for two different functions. Do not do that . Just don't.

 import Tkinter tk = Tkinter.Tk() def frame_2(): """ ENTERING AGE """ global frame1 global frame2 if frame1 != None: frame1.grid_forget() frame1.destroy() frame1=None frame2 = Tkinter.Frame(tk, borderwidth=2,) frame2.pack(fill=Tkinter.BOTH,expand=1,pady=50,padx=80) need_info = Tkinter.Label(frame2, text="I need some information first...") need_info.grid(row=0, column=0) #displays text at top of frame enter_age = Tkinter.Label(frame2, text="Please enter your age!") enter_age.grid(row=2, column=0) #displays second line of text age = Tkinter.Entry(frame2, width=10) age.grid(row=3, column=0) nextpage = Tkinter.Button(frame2,text="Continue",command=frame_3) nextpage.grid(row=10, column=0) exitapp = Tkinter.Button(frame2,text="Exit",command=tk.destroy) #exits programme exitapp.grid(row=12, column=0) def frame_3(): #ENTERING EDUCATION global frame2 global frame3 if frame2!=None: frame2.grid_forget() frame2.destroy() frame2=None frame3 = Tkinter.Frame(tk, borderwidth=2) frame3.pack(fill=Tkinter.BOTH,expand=1,pady=50,padx=80) age_confirm = Tkinter.Label(frame3, text="You entered 38!") age_confirm.grid(row=0, column=0) exitapp = Tkinter.Button(frame3,text="Exit",command=tk.destroy) #exits programme exitapp.grid(row=12, column=0) frame2=None frame3=None frame1 = Tkinter.Frame(tk, borderwidth=2) #WELCOME PAGE, aka The first frame frame1.pack(fill=Tkinter.BOTH,expand=1,pady=50,padx=80) label = Tkinter.Label(frame1, text="Welcome to NAME GAME! I'm going to guess who you are...") label.grid(row=0, column=0) #displays text at top of frame nextpage = Tkinter.Button(frame1,text="Continue",command=frame_2) nextpage.grid(row=2, column=0) exitapp = Tkinter.Button(frame1,text="Exit",command=tk.destroy) #exits programme exitapp.grid(row=4, column=0) tk.mainloop()