Menu bar not showing in gui window

[Larz60+]

You needed to provide window info to menu class:

Application.py

import tkinter
from menuBar import MenuBar
 
class Application:
    def __init__(self):
        # Create and display a test window for viewing the menus
        window = tkinter.Tk()
        window.minsize(500, 500)
 
        # Create an instance of the MenuBar class and display it to the window
        mb = MenuBar(window)
        # window.config(menu = mb)
 
        window.mainloop()

if __name__ == '__main__': 
    Application()

menuBar.py

import tkinter
 
class MenuBar:
    def __init__(self, window):
        # Create and display the main menu bar
        menuBar = tkinter.Menu(window)
 
        # Create a pull-down menu for file operations
        fileMenu = tkinter.Menu(menuBar, tearoff = False)
        fileMenu.add_command(label = "New")
        fileMenu.add_command(label = "Open...")
        fileMenu.add_command(label = "Close")
        fileMenu.add_command(label = "Exit")
        menuBar.add_cascade(menu = fileMenu, label = "File")
         
        # Create a pull-down menu for editing operations
        editMenu = tkinter.Menu(menuBar, tearoff = False)
        editMenu.add_command(label = "Cut")
        editMenu.add_command(label = "Copy")
        editMenu.add_command(label = "Paste")
        editMenu.add_command(label = "Select All")
        editMenu.add_command(label = "Undo")
        editMenu.add_command(label = "Redo")
        menuBar.add_cascade(menu = editMenu, label = "Edit")
 
        # Create a pull-down menu for help operations
        helpMenu = tkinter.Menu(menuBar, tearoff = False)
        helpMenu.add_command(label = "About")
        menuBar.add_cascade(menu = helpMenu, label = "Help")
        window.config(menu=menuBar)