Python

[doc_bean]

Or what do you mean by Development Environment?

Something like eclipse, which is primarily for java, but has python plug-ins I've read. Essentially a text editor for programming that points out the obvious errors and offers several functions for faster (and correcter) programming.
For instance if you have an object named thing (from a certain class) and you type "thing." it will give you a list of all the functions that could apply (like for instance thing.getName()), this way you don't have to remember every exact name you've used for your methods or variables. It will also point out every (in theory) error the compiler would give if you were to compile ate that moment, with access to a list of suggestion how to fix it (adding throw clauses for instance).

I don't get the first parts of the Python tutorial...Any help?

I don't know Python, but perhaps you could point out (and/or quote and/or explain) exactly what you don't get ?