tkinter - Having trouble with this method of changing and showing a new window in python -

i having quite trouble using classes in python. first code used in changing , showing new window works cluttered decided use class. there might wrong in code. can atleast see it? thank you. hoping fast response.

import random, sys, os, rabinmiller, cryptomath tkinter import * import tkinter tk pil import image, imagetk tkinter.filedialog import askopenfile  class mainframe(tk.tk):     def __init__(self, *args, **kwargs):         tk.tk.__init__(self, *args, **kwargs)         container = tk.frame(self)         #frame1.title("rsa cryptosystem")         #frame1.config(bg="black")         container.columnconfigure(0, weight=1)         container.rowconfigure(0, weight=1)          self.frames = {}          f in (startpage, decryptionpage, encryptionpage, makekeypage):             frame = f(container, self)             self.frames[f] = frame             frame.grid(row=0, column=0, sticky=(n, w, e, s))         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)         image4 = image.open("rsa cryptosystem logo.jpg")         photo4 = imagetk.photoimage(image4)         label1 = tk.label(self, image=photo4)         label1.grid(column=1, row=1, columnspan=3, padx=5, pady=5)         label1.image = photo4         image1 = image.open("make key.jpg")         photo1 = imagetk.photoimage(image1)         image2 = image.open("encryption button.jpg")         photo2 = imagetk.photoimage(image2)         image3 = image.open("decryption button.jpg")         photo3 = imagetk.photoimage(image3)          button1 = tk.button(self, compound=top, command=lambda: controller.show_frame(makekeypage), width=338, height=338, image=photo1)         button1.grid(column=1, row=2, sticky=s, rowspan=2, padx=5, pady=5)         button1.image = photo1         button2 = tk.button(self, compound=top, command=lambda: controller.show_frame(encryptionpage), width=525, height=150, image=photo2)         button2.grid(column=2, row=2, sticky=(w, e), columnspan=2, padx=5, pady=5)         button2.image = photo2         button3 = tk.button(self, compound=top, command=lambda: controller.show_frame(decryptionpage), width=525, height=150, image=photo3)         button3.grid(column=2, row=3, sticky=(w, e), columnspan=2, padx=5, pady=5)         button3.image = photo3  class decryptionpage(tk.frame):      def __init__(self, parent, controller):         textframe1 = tk.text(self, width=70, height=32).grid(column=3, row=2, rowspan=3, padx=5, pady=5, sticky=(s, e))         image5 = image.open("insert private key.jpg")         photo5 = imagetk.photoimage(image5)         image6 = image.open("insert encrypted text.jpg")         photo6 = imagetk.photoimage(image6)         image7 = image.open("decrypt.jpg")         photo7 = imagetk.photoimage(image7)          button4 = tk.button(self, width=338, height=80, image=photo5, command=open_file)         button4.grid(column=1, row=2,columnspan=2, sticky=n)         button4.image = photo5         button5 = tk.button(self, width=338, height=80, image=photo6, command=open_file)         button5.grid(column=1, row=3, columnspan=2, sticky=n)         button5.image = photo6         button6 = tk.button(self, text="back", command=lambda: controller.show_frame(startpage))         button6.grid(column=1, row=1, padx=5, pady=5, sticky=w)         button7 = tk.button(self, width=338, height=338, image=photo7)         button7.grid(column=1, row=4, padx=5, pady=5, columnspan=2, sticky=s)         button7.image = photo7  class encryptionpage(tk.frame):      def __init__(self, parent, controller):         textframe2 = tk.text(self, width=70, height=32).grid(column=3, row=2, columnspan=2, rowspan=3, padx=5, pady=5, sticky=(s, e))         image8 = image.open("insert public key.jpg")         photo8 = imagetk.photoimage(image8)         image9 = image.open("encrypt.jpg")         photo9 = imagetk.photoimage(image9)          button8 = tk.button(self, width=338, height=80, image=photo8, command=open_file)         button8.grid(column=1, row=2,columnspan=2, sticky=n)         button8.image = photo8         button10 = tk.button(self, text="back", command=lambda: controller.show_frame(startpage))         button10.grid(column=1, row=1, padx=5, pady=5, sticky=w)         button9 = tk.button(self, width=338, height=338, image=photo9)         button9.grid(column=1, row=4, padx=5, pady=5, columnspan=2, sticky=s)         button9.image = photo9          receivename = stringvar()         receivename_entry = tk.entry(self, width=85, textvariable=receivename).grid(column=4, row=1, padx=5, pady=5, sticky=(w, e))         label4 = tk.label(self, text="to: ").grid(column=3, row=1, padx=5, pady=5, sticky=w)   class makekeypage(tk.frame):      def __init__(self, parent, controller):         keyname = stringvar()         phone = stringvar()         keyname_entry = tk.entry(self, width=15, textvariable=keyname)         keyname_entry.grid(column=2, row=2, sticky=e, padx=5, pady=5)         label2 = tk.label(self, text="key name: ")         label2.grid(column=1, row=2, sticky=w, padx=5, pady=5)         label3 = tk.label(self, text="key type: ")         label3.grid(column=1, row=3, sticky=w, padx=5, pady=5)         button12 = tk.button(self, text="back", command=lambda: controller.show_frame(startpage)).grid(column=1, row=1, padx=5, pady=5, sticky=w)          prime = tk.radiobutton(self, text="prime", variable=phone, value='prime').grid(column=1, row=4, sticky=(w, e))         luckyprime = tk.radiobutton(self, text="lucky prime", variable=phone, value='luckyprime').grid(column=2, row=4, sticky=(w, e))         button11 = tk.button(self, text="generate keys").grid(column=1, row=5, columnspan=2, sticky=(w, e))    app = mainframe() app.mainloop()