How to extend the interpreter?

[Uwe Ilgenstein]

Hi,

Can somebody out there give me a hint how to modify the Python language
itself? I tried extending the grammar and running the parser generator.
Now the parser understands the extension but the compiler complains:
"SystemError: com_node: unexpected node type"
I know that there has to be done something more than just
extending/modifying the grammar but I don't know how to do this. Maybe
someone can help...

Thanks,
Uwe.