[Python-ideas] iterating over a generator while sending values

[Greg Ewing]

Clay Gerrard wrote:

> def consume(q):
>     success = None
>     while True:
>         try:
>             item = q.send(success)
>         except StopIteration:
>             break
>         success = handle(item)

My first thought would be to ask whether you really need
to do things this way round. Instead of the consumer pulling
things from the producer, can you have the producer push
them to the consumer? Then the response is just a function
return value.

Assuming you do need to pull, my solution would be
something like this (not tested):

class Feedbackerator:

    def __init__(self, base):
       self.base = base
       self.response = None

    def __next__(self):
       return self.base.send(self.response)

def consume(q):
    f = Feedbackerator(q)
    for item in f:
       f.response = handle(item)

-- 
Greg