End the Chaos, Get with the Program: Python Logging to Syslog, and Filtering with RSyslog

This article describes how to use Python's logging library to send logs to syslog. Then, using rsyslog, a fancier syslog, we produce a log of pre-filtered output.

I have a process that runs a few times an hour, and it spits out results to STDOUT, which cron dutifully emails to me.

Search this Site from the Search Box

If you go to the home page you can add a site-limited google search to your search bar. Google isn't too nice about it, but it'll work.

Script to set up Python virtualenv

This script sets up both python 2.* and python 3 virtual environments in a directory.

#! /bin/bash

# sets up the packages/python directory's virtualenvs 
# make sure these envs are in .gitignore
#
virtualenv env
virtualenv -p python3 env3

. env3/bin/activate
for i in pip grip requests setuptools six wheel mysqlclient coverage; do
    pip install $i
done

deactivate

. env/bin/activate
for i in pip setuptools; do
    pip install $i
done

deactivate

Why bother? Because this is a way to redeploy the environment on an empty computer.

Movies about the Great Recession / Real Estate Bubble / Economic Crisis

2010 is upon us, and unlike the Arthur C. Clarke sequel to 2001, wherein the world is exploring space, in the real 2010, the world is trying to find a goddamn job and avoid a huge, double-dip recession and rapid price deflation.

Visual Basics: VB, VBA, MS Office

This is a collection of related notes. I will not be updating them as I'm not using the platform at this time.

They're out of order, but there's a lot of potentially useful information in here. Maybe I'll compile it into a short ebook at some point.

Online Ads - oh s- they really work on me

I've been putting ads on here for years, and they have basically failed. On other sites, it's actually OK, making a little trickle of money, which is so weird. Lately, I've been looking at the ads on this site, and sometimes I click them. It's not click fraud because I'm actually interested. So they are working. Then I put up this hideous ad with a big stack of text ads, and I wanted to click more than one of them.

Unreal.

These ads work on me now.

Python Packaging, Development, Git, and an Epiphany about Contemporary Development

So, I have this library, and it's always a pain to release it onto my internal computers (or any computers). Unlike the web apps it's not running from a virtualenv. It's right on the system. Maybe it shouldn't be :/

Anyway, that was my motivation for learning Python packaging. It's not hard, but you have to follow every step in the tutorials, and really repeat them a few times. After a couple tries, I had my "eggs" working locally. I also found out that I'm supposed to use pip to make "wheels" instead. I was behind the times.

Making Some Promises (in Parse, but also relevant to jQuery and Backbone)

What a confusing topic. Unfortunately, if you start wanting to add "library" features to your code, like I did, you have to study Promises.

These are notes about Parse.Promises, and the end product is a small object that caches models.

Some Parse.com Cloud Code Gotchas

Getting back into CC has been full of annoying gotchas.

console.log() prints incorrectly

It stringifies the objects instead of using the formats favored by FireBug and Chrome's dev tools. So you will see things like {"foo":1} which aren't plain JS objects, but are really Parse Objects. Parse Object properties are accessed via get() and set().

Assume printed objects are really Parse Objects, which are like Backbone objects, and have a get() and set() method.

How do you get to the object that was saved?

request.object

Translating Angular Events into D3 Events

Converting or translating Angular events into d3 events was a lot easier than I thought it would be. Here's the code:

disp = d3.dispatch('resize');
angular.element(window).bind('resize', function() {
    disp.resize('foobar');
});

disp.on('resize', function(arg) {
    console.log(arg);
    // resize code is here
});

DOM tests in Jasmine

This continues some notes about working on sf-active-js, moving it to a contemporary Javascript development environment.

Here's a Jasmine spec to instantiate an HTML5 widget and test a few of the method calls. These method calls cause changes in the DOM, and these tests verify that the changes happened.

describe("comment", function() {
    var comment;
    beforeEach(function() {
        var elements = $('<div id="disclose"></div><div id="edit"></div>');
        $('body').append(elements);
        comment = Comment('#edit', '#disclose');
    });

Browserify libraries that can be tested with Jasmine... before they are rolled up by Browserify

This is part of a series of notes about bringing a JS project, sf-active-js, over to a contemporary Javascript development environment.

This is a trick to write modules that are testable in a browser, without subjecting the test to Browserify. Why?

I want to develop without the compilation step. It's easier and faster to work in the browser. (This particular app is mostly DOM manipulation, so headless isn't important.) Once the module has settled down, it can be added to the library.

The rest of this note assumes you know the Jasmine sample test runner included with the distro.

Notes on migrating to a contemporary javascript development environment

I'm writing this after writing the first two notes in this series about migrating sf-active-js to a contemporary Javascript development environment.

I wrote the original experiment a couple years ago. It's a JS client that retrieves some json data from the la.indymedia.org server, and displays it. I ran out of time, and didn't finish it then.

Upon revisiting the code, I found it a little confusing. It was around 800 lines of jQuery-style JS.

One Event Bus to Rule Them All! d3 dispatch, the d3 event system, notes

Learning d3 events this afternoon. These are the notes I'm taking while I'm learning it. I hope it helps.

It's called d3.dispatch. d3.dispatch('eventname1','eventname2') returns an object that manages setting event handlers, and dispatching events. The event system isn't global (unlike in most frameworks, where the event system appears to be globally available)- it's contained entirely within the object.

How many steps are there in a simple user registration and login?

We all take it for granted that most sites will have a user registration system, and way to log in. We're used to it, and most people are unaware of how complex it is.

So, how complex is it?

It's around 15 different steps or screens.

Fifteen.

I've done it a dozen times, and I think that's about right.

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