On most OSes, select() and other polling APIs always report disk files to be "ready", so you basically can't use asyncio with them. On Windows it will fail; on *n*x it will appear to work but actually you are doing the whole thing synchronously. The only way to overlap disk I/O with asyncio events would be to do the disk I/O on a separate thread.
Someone is working on sendfile support ( https://code.google.com/p/tulip/issues/detail?id=144, http://bugs.python.org/issue17552) which would help overlap disk I/O and socket I/O for the specific case of serving a file from disk directly to a socket, but even that would be pretty limited. On Mon, Aug 25, 2014 at 3:06 PM, Ludovic Gasc <[email protected]> wrote: > Hi, > > I'm looking for the best way to read/write files with AsyncIO. > Ideally, I want to r/w asynchronously, like with network. > > I've found this: https://gist.github.com/kunev/f83146d407c81a2d64a6 > > Is it ok, or do you have a better suggestion ? > > Regards. > -- --Guido van Rossum (python.org/~guido)
