Ross Lagerwall <rosslagerw...@gmail.com> added the comment:

> Personally, I would factor out the code for Popen.communicate() in to a > 
> Communicator class which wraps a Popen object and has a method
>
>    communicate(input, timeout=None) -> (bytes_written, output, error)

How would this differ from the normal communicate()?

It seems like there are two different ideas for why people want an 
"asynchronous subprocess":

One is that they want to use communicate() but not be limited by memory issues.
I think a good API for this case is an asyncore style API or like the one from 
the patch in issue1260171.

Another use case is for an expect-type interface where you read and write based 
on a timeout or some kind of delimiter like a newline.

These should probably be addressed independently.

See also issue10482.

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<http://bugs.python.org/issue1191964>
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