Structure

from tkinter import *
from PIL import Image, ImageTk



class Window(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.master = master
        self.init_window()

    # Creation of init_window
    def init_window(self):
        # changing the title of ourmaster get_tk_widget
        self.master.title("GUI")

        # allowing the widget to take the full space of the root window
        self.pack(fill=BOTH, expand=1)

        # creating a menu instance
        menu = Menu(self.master)
        self.master.config(menu=menu)

        # create the file object
        file = Menu(menu)

        # adds a command to the menu option, calling it exit, and the command it runs on event is client_exit
        file.add_command(label="Exit", command=self.client_exit)

        # added "file" to our menu
        menu.add_cascade(label="File", menu=file)

        # create the file object
        edit = Menu(menu)

        # adds a command to the menu option, calling it exit, and the command it runs on event is client_exit
        edit.add_command(label="Show Img", command=self.showImg)
        edit.add_command(label="Show Text", command=self.showText)

        # added "file" to our menu
        menu.add_cascade(label="Edit", menu=edit)

        # view menu
        view = Menu(menu)
        view.add_command(label="View", command=self.testprint("print test view"))
        menu.add_cascade(label="View", menu=view)

        # creating a button instance
        quitButton = Button(self, text="Quit", command = self.client_exit)

        # placing the button on my window
        quitButton.place(x=0, y=0)

    def showImg(self):
        load = Image.open("chat.png")
        render = ImageTk.PhotoImage(load)

        # labels can be text or iamges
        img = Label(self, image=render)
        img.image = render
        img.place(x=0, y=0)

    def showText(self):
        text = Label(self, text="Hey there good lookin!")
        text.pack()

    def client_exit(self):
        exit()

    def testprint(self, str):
        print(str)

root = Tk()

# size of the window
root.geometry("400x300")

app = Window(root)
root.mainloop()