I'm using classes and such to make a calculator in Tkinter, however I want to be able to be able to reuse widgets for multiple windows. How can I do this if this is possible?
As you commented:

I'm making a calculator, as mentioned and I want to have a drop down menu on the window, that when selected it closes the root window and opens another, and I want to have the drop down menu on all the different pages, 5 or 6 in all

In this case, just write a function that creates the menu.
Then call that function when creating each of the windows.
Is it possible to reuse a widget in Tkinter? If so, how can I do it using classes?