Advanced concurrancy

[jemfinch at gmail.com]

Asynchrony is not concurrency.  If you have to turn your code "inside
out," (that is, if you have to write your code such that the library
calls your code, rather than vice versa) it's very much *not*
concurrency: it's just asynchrony.

While Twisted makes asynchronous code relatively easy to write and
maintain, it's just not concurrency.  I can't simply drop my
single-threaded code into it and have it work, like I can with a truly
concurrent system.

Jeremy