Is Eval *always* Evil?

[Lawrence D'Oliveiro]

In message <mailman.847.1289443207.2218.python-list at python.org>, Robert Kern 
wrote:

> Well, the key reason he is using strings is so that he can easily slap on
> a Django admin UI to allow certain users to add new expressions. lambdas
> don't help with that.

Provded you can trust the users who are allowed to add such expressions, 
it’s probably all right.