is equivalent to what we did with set! in Scheme, and pythontutor.com will draw you a beautiful frame diagram and step through the evaluation of fib(3). But we can now take the lid off and see what’s ...

> Why are some things in Python so damn easy? It's like evil magic. I've always heard that writing in Lisp is some type of mystical experience. Like when you stumble upon the power of macros and ...