This appendix is for "classic" Python programmers who have already decided to try Ruby. Python is way too big for this section to be able to cover every aspect in a few pages, so the focus will be on assisting you in making a perspective shift and help you avoid misconceptions. Additionally, various tidbits will be pointed out along the way.
A good way to practice is by using irb to try things, which is one of Ruby's best interactive command line evaluators. This is similar to Python's built-in command line interpreter, but is a separate program.
