silentgiant oxidizeddreams

Here's a few things I tried to write output to a python subprocess pipe.

from subprocess import Popen, PIPE

p = Popen('less', stdin=PIPE)
for x in xrange(100):
    p.communicate('Line number %d.\n' % x)

This configuration is not maintained anymore. You should think twice before using it, Breaking change and security issue will likely eventually happens as any abandonned project.

MySQL

Getting started

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

Useful Pandas Snippets

A personal diary of DataFrame munging over the years.

Data Types and Conversion

Convert Series datatype to numeric (will error if column has non-numeric values)
(h/t @makmanalp)

Recently, Everyday Hero has been doing a heap of work around the automation and provisioning of resources with AWS cloud services. This entails working frequently with the AWS API.

A useful filter we have been using in Ansible is taking output from a shell action and turning it into something we can consume via variables.

An example playbook is below:

	/**
	* Infix to postfix notation RegExp converter
	*
	* To implement RegExp machine (NFA, DFA) we need
	* to transform first RegExp string to postfix notation
	* for more convinient work with the stack. This function
	* does exactly this.
	*
	* See: http://swtch.com/~rsc/regexp/regexp1.html
	*

	#!/usr/bin/python

	# All SSH libraries for Python are junk (2011-10-13).
	# Too low-level (libssh2), too buggy (paramiko), too complicated
	# (both), too poor in features (no use of the agent, for instance)

	# Here is the right solution today:

	import subprocess
	import sys

	#!/bin/bash
	#
	#########################################################################
	#This software code is made available "AS IS" without warranties of any #
	#kind. You may copy, display, modify and redistribute the software #
	#code either by itself or as incorporated into your code; provided that #
	#you do not remove any proprietary notices. Your use of this software #
	#code is at your own risk and you waive any claim against Amazon #
	#Digital Services, Inc. or its affiliates with respect to your use of #
	#this software code. (c) 2006-2007 Amazon Digital Services, Inc. or its #

	#!/bin/bash
	#
	# --------------------------------------------------------------------
	# This is a free shell script under GNU GPL version 3.0 or above
	# Copyright (C) 2005 ReFlectiv project.
	# Feedback/comment/suggestions : http://www.reflectiv.net/
	# -------------------------------------------------------------------------
	#
	# This script automatically set up a new Debian server (IMPORTANT : Debian!), by doing these actions :
	#