Send data to asyncio coroutine

Javier jcarmena at
Sun Aug 2 02:50:58 CEST 2015

El sábado, 1 de agosto de 2015, 21:15:07 (UTC+2), Marko Rauhamaa  escribió:
> Javier <jcarmena at>:
> > My intention now is to use the asyncio.StreamReader passed as argument
> > to the asyncio.start_server callback to read objects serialized with
> > pickle. The problems are that pickle cant read from it (because dont
> > yield from the full stack) and that I don't know the exact length of
> > each serialized object, so I can't extract data manually.
> >
> > Knows anybody the steps to follow?
> You probably need to frame your pickled encoding. A simple thing would
> be to use struct.pack/unpack to encode the length of the pickle encoding
> in front of the pickle encoding. When decoding, you first read out the
> length, then the pickle encoding, and finally you unpickle the payload.
> Marko

Great! it works! I could not find a way to send an integer with fixed length, struct.pack/unpack does the job perfectly.


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