Show variables

[dimagroz]

the import Expression clearly figures out the variables such as in

from Equation import Expression
fn = Expression("var1 + var2/10")

Is there a method to list these var names. Such as fn.showVar will output ("var1","var2")

Also it will be much help if you could do something in the form of Expression.help to list out all usable methods and variables of Expression as a string

[dimagroz]

Please implement something that gives me the var names. I really need it for a research project I am doing and it would realy realy realy help. I dont want to go out and make a method do this cause well, I hate manaul parsing and I am more of a script kitty, jr, and I really need this, and Id rather spend the time writing this then doing it myself and I prob wont publish this but if I do here it is why am I still writing....
okay I am done well now what I guess Ill wait