machine control script ( parameterless method? )

[Bluexcell]

Assuming your machine program is not hard wired..then the user is using some
form of GUI or other interface to alter the parameters for control, why not use
a Tkinter GUI to create the program I/O interface.. the checks and safeguards
for  for incorrect entry are hidden and the user is more inclined to enter the
right data in the right place?