passing arguments from scale widget to function

[m7b52000]

Some time ago I wrote a little program in Tcl/Tk that took the values 
from 3 sliders and performed a calculation using these values. The 
calculation was of course automatically repeated each time a slider was 
moved.

It is proving most difficult in Python. How do I pass the .get() values 
to my calculating function? Do I use the command option for each 
slider? e.g command = Calc(a.get()). Obviously not cos it doesn't work.

I am not a real programmer and do not wish to get involved in classes 
and objects....