1) There is a new opcode new Px, Sc:
new P0, "PyInt"
2) If the given class doesn't yet exist, Parrot_autoload_class is called which has hardcode mapping for "Py" => "python_group", "Tcl" => "tcl_group". A bit hackish but working ...
3) The pybuiltin.__load__() function is automatically called by the library _init loading hook now.
There is one more test in t/dynclases/pybuiltins that has an example.
leo
