Destroying label frames - python-3.x

Question

I am tinkering around with basic things in Tkinter/python. I am using the LabelFrame that corresponds with several buttons I click. I am struggling with trying to destroy the other frames and only displaying the frame I want visible when clicking on a certain button. When I run this code:
def lblframe1_view():
lblframe3.destroy()
lblframe2.destroy()
lblframe1 = LabelFrame(root, text="This is Frame One", height=370, width=370, bd=5, relief=FLAT).place(x=215, y=20)
btn1 = Button(lblframe1, text="this is button one").pack()
def lblframe2_view():
lblframe1.destroy()
lblframe3.destroy()
lblframe2 = LabelFrame(root, text="Frame Two", height=370, width=370, bd=5, relief=FLAT).place(x=215, y=20)
btn2 = Button(lblframe2, text="this is button two").pack()
def lblframe3_view():
lblframe1.destroy()
lblframe2.destroy
lblframe3 = LabelFrame(root, text="this is frame 3", height=370, width=370, bd=5, relief=FLAT).place(x=215, y=20)
def exit():
root.destroy()
manbtn1 = Button(root, text="Frame 1", bg="white", height=4, width=25, command=lblframe1).place(x=10, y=20)
mainbtn2 = Button(root, text="Frame 2, bg="white", height=4, width=25, command=lblframe2).place(x=10, y=120)
mainbtn3 = Button(root, text="Frame 3", bg="white", height=4, width=25, command=lblframe3).place(x=10, y=220)
exitbtn = Button(root, text="Exit", bg="white", height=4, width=25, command=exit).place(x=10, y=320)
When I run this I get the following error:
NameError: name 'lblframe3' is not defined
I have tried to put the functions after buttons and got the same error. I have done research on this
and haven't been able to figure out why this keeps happening. My hunch is python

Answer 1

Im not a experienced python programmer myself but there are a few things i noticed that might help you out.
Please make sure the code you post here is tested, it is a bit annoying if i have to debug the code before i can help you in the first place. (referring to the " in third line from the bottom as well as the indentation).
Button(command) takes a function as a argument. You provided a Object. So try to switch the command to command = lblframe1_view instead of lblframe1.
Frames in tkinter are objects, therefore they can not be accessed from a function where they were not defined in, unless u declare them global or pass it in as a argument. What that means is if lblframe1_view() is called, it does not know what lblframe3 or lblframe2 are.
I hope this helped you out.
EDIT:
I just realised that there might be one more problem with the structure of your programm that can not be solved by declaring the frames as globals.
In lblframe1_view u want to destroy an object that does not even exist yet, since it only will be created if lblframe2_view() and lblframe3_view() have been executed beforehand. But those two functions will also throw an error, since lblframe1 is not created yet.

Answer 2

I was able to do some research and found the answer I was looking for: I credit sentdex from Youtube for this. He basically stacks the frames on top of one another and a button click actually calls up the frame based on the command.
from tkinter import *
import tkinter as tk
from tkinter import ttk
LARGE_FONT = ("verdana", 12)
class tool(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.iconbitmap(self, default="supporticon.ico")
self.geometry("400x400")
self.resizable(0,0)
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="nsew")
frame.config(bg="darkblue")
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)
homeframe = LabelFrame(self, text="testing this out", width=200, height=350)
homeframe.config(background="darkblue", fg="white")
homeframe.pack()
label = Label(homeframe, text="Start Page", font=LARGE_FONT)
label.config(background="darkblue", fg="white", height=400, width=450)
label.place(x=10, y=20)
button1 = ttk.Button(homeframe, text="Vist Page 1",
command=lambda: controller.show_frame(PageOne))
button1.pack()
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = tk.Label(self, text="Page One", font=LARGE_FONT)
label.pack(pady=10, padx=10)
button1 = tk.Button(self, text="Back to Home",
command=lambda: controller.show_frame(StartPage))
button1.pack()
app = tool()
app.resizabe=(0,0)
app.geometry=("450x450")
app.mainloop()