Andre Almar andrealmar

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]:

	# JSON Resume

	[JSON Resume] is an easy way to produce an adaptible and professional-looking resume. We recommend that you use it. It'll save you a lot of headaches about formatting, file types, and the like. Plus, it'll make you look like you know how to Internet.

	This is what the underlying format looks like:
	```
	{
	"basics": {
	"name": "John Doe",
	"label": "Programmer",

	on settings.py change the DATABASES config to something like this:

	DATABASES = {
	"default": {
	"ENGINE": "django.db.backends.postgresql_psycopg2",
	"NAME": "[YOUR_DATABASE_NAME]",
	"USER": "[YOUR_USER_NAME]",
	"PASSWORD": "",
	"HOST": "localhost",
	"PORT": "",

	-p # port binding eg.HOST:CONTAINER - 5433:5432
	-e # env variabls

	# Run a container mounting an outside volume inside the container
	docker run -it -v /Users/andrealmar/primeiro_dockerfile/:/volume alpine

	# Inspect mounted volume of a Container
	docker inspect -f {{.Mounts}} 8a73d606bd9c

	# creating and executing a PostgreSQL container using another container as a Volume

	Latency Comparison Numbers
	--------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	# TO RUN the WLST script just type the command below:
	# /webtools/oracle/plat1200_1/middleware/oracle_common/common/bin/wlst.sh weblogic_ad_users.py

	# Author: ANDRE ALMAR

	servidor = raw_input('Digite o servidor: ')
	porta = raw_input('Digite a porta: ')
	usuario = raw_input('Digite o usuario: ')
	password = raw_input('Digite o password: ')
	roles = ['Deployer', 'Monitor', 'Operator', 'IntegrationDeployer', 'IntegrationMonitor', 'IntegrationOperator']

	Então mudaremos, na própria linha de comando do vi, a palavra "amamu" pelo correto, amamos.
	Sendo key-sensitive a utilização deste comando, execute:

	:%s/amamu/amamos/g

	# Author: Andre Almar - [email protected]

	import os, subprocess
	from subprocess import call

	print 'Validando FileSystem /webaplic'
	if os.path.isdir('/webaplic'):
	print "Diretorio /webaplic ja existe"
	else:
	try: