[EMAIL PROTECTED] wrote:
...
  so, it seems to me that if I would know how to write a file object,
then I could write one that prefixes each line, and that would be
fine, no? I don't see how this would necessitate waiting for p.py's
termination, or matter that it is a different process. I just don't
know how to create a file object.

Duck typing to the rescue:  Here's a simple file object for writing:

class MyFunkyOutput(object):
    def write(self, sometext):
        print repr(sometext)
    def close(self):
        pass

outputter = MyFunkyOutput()
print >>outputter, 1,'a', 43
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