pycon_ru_2015.md

Benjamin Peterson - Python Packaging Progress

Presentation just enumerates all tools related to the packaging and their development timeline. It is about pain and

1. Find out that there is a PyPi replacement project in development Warehouse

   1. Clean code base and developed in Python 3.x

   2. Engineering design, non-attractive

   3. Nice feature - Versions section with date and link to the package version!

      At PyPi I found only https://pypi.python.org/simple/<package>/ to see all available versions but with missing dates which is sometimes helpful information.

2. Raised interesting question of a single-executable for Python programs - currently there is no discussion or PEP to have this feature as part of the standard Python packaging.

Anew Svetlov - Aiohttp (slides)

aiohttp (works on 3.3, 3.4) consists of two parts:

• client
  • code looks really nice as plain synchronous code but with keywords usage (from 3.5)
  • supported
    • Session (cookies)
    • timeouts (used asyncio.wait_for)
    • WebSockets
  • supported timeouts (used asyncio.wait_for)
  • supported WebSockets
• server
  • static/variable routing. Variable routing support regexp in the pattern
  • restore URL by handler name, registered in the application
  • debug toolbar, sessions (are implemented as a middleware)
  • implementation provides a way to shutdown a server softly so the remaining requests will be processed and user won't notice shutdown.
  • debugging
    • PYTHONASYNCIODEBUG=1 helps to determine not called coroutines (if forget to mark as a yield from)
  • covered testing, should be easy to test
  • good speed comparing to Tornado and Twisted
  • deployment (WSGi)
    • make sense to run a loop per process
    • nginx (reverse proxy, nix_http_upstream_module?) + process per core supervised by supervisord