Hi All, Apologies for the cross-post, but this is a "which framework" question so seemed the most constructive way. Not interested in religious debates, just trying to pick the best tool for the job and didn't get much of a useful response from python-list... So, I see python now has a plethora of async frameworks and I need to try and pick one to use from: - asyncio/tulip - tornado - twisted From my side, I'm looking to experimentally build a network testing tool that will need to speak a fair few protocols, both classic tcp and multicast-based, and have a web api living on top of it that most likely will have a websocket for pumping data to the browser. It'll also need to write out JUnit-compatible xml results, but that's like the easiest bit ;-) I'd like to be able to serve the rest of the web api using a pyramid wsgi app if possible, and I'd like to be able to write the things that process requests in and validation out in a synchronous fashion, most likely spinning off a thread for each one. The protocols are all financial (do we really not have a pure-python FIX library?!) but none are likely to have existing python implementations. How should I pick between the options? What would people recommend and why? cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk