Properties are not the same thing as attributes though. If `A.b` is a property (has a __get__ method associated with it), then this could easily break your code

Properties are not the same thing as attributes though. If `A.b` is a property (has a __get__ method associated with it), then this could easily break your code because `A.b` is supposed to change values. If it's an attribute that stays the same, then yeah I'll grant you that it could speed things up if it's being accessed frequently in a loop. There's not really any way for Python to tell if it can be optimized statically. https://ideone.com/4R0suA https://ideone.com/4R0suA