[Tkinter-discuss] Tkinter.bind(), watching for mouse click and release inside a canvas

[aonomus]

My goal is to write a clip of code so that a user can click inside a canvas,
drag and release to make a crop box of his size, then crop. So after looking
around at pages like
http://www.pythonware.com/library/tkinter/introduction/events-and-bindings.htm,
I figure I can:

canvas.bind('<Button-1>', func1)
canvas.bind('<B1-Motion>', func2)
canvas.bind('<ButtonRelease-1>', func3)

Currently I can print the variables, but is there any way to actually return
the x,y coordinates of the mouse and store them in a variable? This is part
of a larger photo editor project, but in general I want to be able to watch
for mouse clicks and return position values... any idea as to how?
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