Operators in Finesse command names
There's an issue if you have something like:
s west-s 1 n2 n3
as there is a python operator in the name. Oddly, python allows a property to be named like this, but then script parsing does not work.
Need to add in a check when creating pykat objects to check for operator characters (+-*.^@, maybe others too) and raise an exception for the user to handle.