I want to code in Scheme

But I don't really know how to write idiomatic code. Is anyone here willing to rewrite some of my python code, so I can see how it's done?

Also, what is the code-tag on this board?

The gentoomen library has some nice resources on Scheme, and rosetta code has nice code examples. The only bad thing about the language is the lack of libraries and the diffrences between implementations. Doesn't matter though, no one would be so crazy to use Scheme to write robust enterprise-quality software.