The official answer from any Python developer to anybody asking about "magic" is "do not use it". It's simple, gets the message across, and when the ones asking are experienced enough to not need asking about it, they'll just be one disaster away from being experienced enough to know when to use it. (There are plenty of resources on how to do it. Just no assurance that you should.)

Overall, it's a more useful response than the Ruby's community one. Ruby seems to have inherited the Lisp propensity of meta-programing everything so many of its basic libraries are incredibly hard to follow. Even with Ruby's metaprograming features being easier.

Still, providing safe metaprograming features sidesteps everything. I do love Haskell.