4 problems noted here.

Thanks, Dave.

1,2---problems 1 & 2 concern py<3k references:

http://docs.python.org/dev/3.0/library/multiprocessing.html


1) "apply(func[, args[, kwds]])
Equivalent of the apply() builtin function. It blocks till the result 
is ready."

Of course there isn't any longer an "apply" builtin.


2) "imap(func, iterable[, chunksize])
An equivalent of itertools.imap()."

Likewise, there's no "itertools.imap".  Perhaps use 
itertools.some_sort_of_truncating_wrapper(itertools.zip_longest(...))?


This brings us to the itertools problem.


3,4---problems 3 & 4 concern "izip" in: 

http://docs.python.org/dev/3.0/library/itertools.html

This mentions "izip_longest()", but there isn't an "izip_anything" in 
py3k itertools.  Searching the page for the string "izip" produces two 
separate occurrences.  izip_longest -> zip_longest but I don't know 
how to fix the other one.