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I've been using asyncio in the last week. I've found it remarkable clean and intuitive. It's difficult to compare to channels in go, because it's such a different solution to the same problem - that of structuring concurrent programs.

If anyone's interested in testing out Asyncio/Tulip on Python 2, here's a mostly-compatible backport: https://pypi.python.org/pypi/trollius/

They aren't like channels. If you want something like channels, try out greenlets for CPython, Stackless Python (a modified version of CPython) or pypy.

I suspect that you could easily implement channels on top of asyncio - goroutines = coroutines, hide the yield-from inside 'send', select = asyncio.wait(return_when=FIRST_COMPLETED).