Python ByteCode and Virtual Machine documentation

[Lucio Torre]

Hi,

I have another question.

Ive read the library documents, the language documents, the tutorials, 
the search engine (VM, virtual machine, bytecode), and using google and 
im kinda lost.

Ive seen someone comment on the bytecode translation of some pieces of 
code, but never seen any documentation.  So i have two questions:

a) where can i find documentation of the virtual machine of python? 
(suppose i want to implement Thyton, a TCP parasitic computing version 
of python)

b) is messing with the virtual machine a 'bad thing'? i mean, for 
example, that the VM is not defined because thats implementation 
dependant and i should only care about understanding and parsing the 
code? if its so, why?

thanks!