[IronPython] Writing new modules

[Nick Bastin]

I'd like to take a hack at implementing _random, but I am a bit 
confused as to how it works, so I have a few questions.  Keep in mind 
that I'm a bit of a C# newbie, so some of the questions might have 
obvious answers to people who have more experience.  I'll also note 
that I'm using Mono.

It seems as if a module is available to the interpreter merely by 
existing in IronPython.Modules.  Is this correct?

There are a lot of extra names in each built-in module that don't exist 
in CPython, like 'Equals', 'GetHashCode', etc.  What are these, and 
where do they come from?

Where are doc strings supposed to be put?  I notice that none of the 
modules seem to have them.

sys.modules appears to be completely non-functional.  Is this a matter 
of just not having an implementation, or is there a technical hurdle 
here?

Similarly, simple errors generate long CLR stacks instead of the normal 
python error messages.  Is this just unimplemented, or is it somewhat 
complicated to get right?

--
Nick