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Python asyncio SO_REUSEPORT OSX issue

Overview

My simple service discovery mechanism is built upon Python 3.4 and the asyncio module. It uses a UDP socket bound to a specified discovery port to allow applications to discover network services. System applications running on the same node bind to the same discovery port in order to receive discovery messages broadcast onto the network.

It is not working on OSX. The current asyncio implementation does not provide a convenient developer access point for setting the SO_REUSEPORT socket option prior to the call to bind.

FWIW: I didn't produce the content present here. I've just copy-pasted it from somewhere over the Internet, but I cannot remember exactly the original source. I was also not able to find the author's name, so I cannot give him/her the proper credit.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Virtualenv's `bin/activate` is Doing It Wrong

I'm a Python programmer and frequently work with the excellent [virtualenv][] tool by Ian Bicking.

Virtualenv is a great tool on the whole but there is one glaring problem: the activate script that virtualenv provides as a convenience to enable its functionality requires you to source it with your shell to invoke it. The activate script sets some environment variables in your current environment and defines for you a deactivate shell function which will (attempt to) help you to undo those changes later.

This pattern is abhorrently wrong and un-unix-y. activate should instead do what ssh-agent does, and launch a sub-shell or sub-command with a modified environment.

	In [1]: class Foo:
	...: def __iter__(self):
	...: return iter([])
	...: def __len__(self):
	...: print("LEN")
	...: return 10
	...:

	In [2]: foo = Foo()