Gustavo Velasco-Hernández gustavovelascoh

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

Tools

throwtheswitch libraries: Unity, Cmock, Ceedling, etc http://www.throwtheswitch.org/

UNITY, Unit Testing for C (especially Embedded Software) http://www.throwtheswitch.org/unity/

CMock, Automated Mock & Stub Generation For C http://www.throwtheswitch.org/cmock/

ZeroMQ vs Redis

This document is research for the selection of a communication platform for robot-net.

Goal

The purpose of this component is to enable rapid, reliable, and elegant communication between the various nodes of the network, including controllers, sensors, and actuators (robot drivers). It will act as the core of robot-net to create a standardized infrastructure for robot control.

Requirements:

Sample service script for debianoids

Look at LSB init scripts for more information.

Usage

Copy to /etc/init.d:

# replace "$YOUR_SERVICE_NAME" with your service's name (whenever it's not enough obvious)

	#!/usr/bin/env bash

	# This script prints out all of your Redis keys and their size in a human readable format
	# Copyright 2013 Brent O'Connor
	# License: http://www.apache.org/licenses/LICENSE-2.0

	human_size() {
	awk -v sum="$1" ' BEGIN {hum[1024^3]="Gb"; hum[1024^2]="Mb"; hum[1024]="Kb"; for (x=1024^3; x>=1024; x/=1024) { if (sum>=x) { printf "%.2f %s\n",sum/x,hum[x]; break; } } if (sum<1024) print "1kb"; } '
	}