turning callback into generator
Wai Yip Tung
tungwaiyip at yahoo.com
Mon Sep 6 21:00:37 CEST 2004
I'm attempting to turn some process than uses callback to return result
into a more user friendly generator. I'm hitting some road block so any
pointer would be appriciated.
Let say there is an existing method producer(x, cb). It calls the supplied
cb() every time when there is data available. The definititon of cb should
To turn it into generator, I tried:
But that's not really the way Python works. 'yield' is not only a
imperative statement but it also the keyword to signify the containing
function as a generator function. So in this case product_generator is an
oridinary function and cb is a generator.
Note that producer() is an existing method that I cannot change. Otherwise
I might strip the cb and yield directly from the producer().
If python would define another keyword 'generator' to explicit distinguish
normal function from generator and decouple it from the 'yield' keyword,
it could perhaps be done that way:
Is this just an syntactic issue or am I hitting on some generator's
implementation issue? Is there a proper way to do this in Python 2.3?
Thanks for any pointer.
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