passing an expression

[Skaperen]

i can code the expression in a string and pass that string to my function with evaluates it with eval() in the context it needs to do (perhaps by raising different exceptions). but i don't really like coding it in a string. is there a better way to do this in Python? the objective is to pass some code (not its value) to a function which may or may not execute it. these would be expressions, not statement, if that matters.