Trio : A pythonic way to do async programming

Trio: A pythonic way to do async programming
[EuroPython 2018 - Talk - 2018-07-25 - Lammermuir]
[Edinburgh, UK]

By Emmanuel Leblond

Concurrent programs are super useful: think of web apps juggling lots
of simultaneous downloads and websocket connections, chat bots
tracking multiple concurrent conversations, or web spiders fetching
pages in parallel. But writing concurrent programs is complicated,
intimidating to newcomers, and often challenging even for experts.

Does it have to be? Python is famous for being simple and
straightforward; can Python make concurrent programming simple and
straightforward too?
Trio is an attempt to address this question by the positive !

By taking advantage of new Python 3 features (async/await keywords,
async loops and context managers etc.) while dropping legacy concepts that
older asynchronous frameworks has to maintain, Trio defines a new set of
primitives that make it dramatically easier to write correct concurrent programs.

In this talk, we will describe those primitives, and demonstrate how to
use them to implement a basic algorithm for speeding up TCP connections.
Compared to the best previous Python implementation, our version turns out to
be easier to understand, more correct, and dramatically shorter.