I am currently trying to create a canvas which will have other objects on it and I want to use a scroll-bar for when the objects on the canvas take too much space so that the size of the window will stay the same. 
The problem is that although I set an initial size for the canvas it changes to fit all of the objects on it. Can I make the canvas to keep a specific size so that I can use the scroll-bar instead?
myscrollbar = Scrollbar(myframe,orient="vertical",command=canvas.yview)
canvas.configure(yscrollcommand=myscrollbar.set)
tkinter fixed canvas size