Lambda the Ultimate

I've been staring a lot at Python code the last couple of days. It suddenly dawned on me that Python is a vindication of Icon's generators. Python's expressivity, as attested by powerful libraries, rests to a large extent on metaprogramming and generators.

Added:Once upon a time we called this sort of thing linguistic abstraction. And people used to have strong arguments against it. I think this is one battle that was decisively won, as usual in favor of the Lisp mindset. Doesn't mean we should strive to make it as safe as possible, but disallowing it is no longer a reasonable approach.