[Pyrex] ability to return NULL from a def function

[sjmachin at lexicon.net]

Consider this:

cdef extern from "python.h":
    int Py_XXX(int arg1) except -1

def myfunc():
    # acquire bags of resources, create reference cycles, call malloc(), whatever
    answer = PyXXX(something)
   # failure means no chance to clean up

SO ...

still have to carry on like a hand-coded C function:

cdef extern from "python.h":
    int Py_XXX(int arg1) # NO except

cdef int bogoff() except --2
   return -2
# I'm the Kludge King, aren't I!?

def myfunc():
    # acquire bags of resources, create reference cycles, call malloc(), whatever
    answer = PyXXX(something)
    if answer == -1:
        cleanup()
        bogoff()

So, any possibility of syntactical sugar to replace bogoff() ?

Cheers,
John