I decided it was time to take a vacation. There was a problem, however: I was under a lot of pressure to finish school-related work. Is it possible to take a vacation without taking a vacation? I came up with the idea of flying to Perth over the Easter long weekend and then catching the Indian Pacific back to Sydney. On April 22, I caught an early-evening Qantas flight to Perth and took a taxi to my guesthouse. Although tired from the flight, or perhaps from the two beers I had with dinner, I decided to explore the CBD. The lights were blazing and, despite it being the start of Easter weekend, plenty of people were out. Perth appeared more diverse than I had anticipated, with a strong Asian influence. Many …

I’ve had several conversations with neighbors and co-workers about the “lack” of forward thinking, or at least the lack of forward action. Of course, I keep in the back of my mind that we aren’t “experts”, and the more I learn about transport the more I learn how complex it is. Dr. Sussman’s CLIOS process (Complex, Large- Scale, Integrated, Open Systems) appears more and more true the longer I work in and study transport. There is a plethora of excuses that can be made, but the general conclusion was that the earlier we prepare the better. I can remember working near Zhongshan 7-8 years ago and driving around on huge roads in the middle of empty fields. There …

I’ve been cleaning up my personal blog a bit, and I noticed that my tagging system recently broke. I’ve investigated the cause, and it appears to be because I removed some apps but the contenttypes remained. This meant that whenever I tried calling a tag with a TaggedItem that had been deleted, I was getting this error: 'NoneType' object has no attribute '_meta' The solution is to first list all app_labels for contenttypes, and then delete any not in use.

I recently had the desire to send small updates to my so called lifestream page via XMPP/GTalk. I played around with Twisted Words and several other Python XMPP clients, but I didn’t really want to keep a daemon running if unnecessary. It turns out imified took a lot of the pain out of it. The steps for me were as follows: Create an account with imified, and create a URL, e.g. /app/api/ We then configure the urls.conf

I was having some issues with my personal mail server (Postfix) and my phone (Android). The logs depicted the below issue: Jan 9 09:19:53 ip-11-222-23-223 postfix/smtpd[12345]: NOQUEUE: reject: RCPT from 12-13-14-15.abc.com.au[12.13.14.15]: 504 5.5.2 <localhost>: Helo command rejected: need fully-qualified hostname; from=<emailaddr kelvinism.com="kelvinism.com"> to=<emailaddr gmail.com="gmail.com"> proto=ESMTP helo=<localhost> </localhost></emailaddr></emailaddr></localhost> We can see here that the stock Android email client is doing a ‘helo localhost’. One part of my main.cf file specifies this:

I’ve recently returned from a short trip home, and I had a wonderful time. I had the opportunity to visit family and friends, eat plenty of delicious food, and generally relax. I reduced the amount of old belongings stored under the house by 80% and gave away all my old books, which are archived on Goodreads.

A few weeks ago I saw an opening to give a 5-10 minute lightening talk at SyPy (Sydney Python), and with two nights to prepare, decided it would be interesting to explore Splunk’s usage of Python. You can see the presentation video

I like using Ubuntu’s UFW command, but today I needed to allow outgoing ICMP. I received results as so: $ ping 4.2.2.2 PING 4.2.2.2 (4.2.2.2) 56(84) bytes of data. ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted To allow outbound icmp I edited ‘before.rules’ and added the following lines. $ sudo vi /etc/ufw/before.rules # allow outbound icmp -A ufw-before-output -p icmp -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT -A ufw-before-output -p icmp -m state --state ESTABLISHED,RELATED -j ACCEPT

I recently had the need to add some HTML to the label for a form field using Django. The solution is pretty easy, except I didn’t see it written explicitly anywhere, and I missed the memo of the function I should be using. My form first just had the HTML in the form label as so: from django import forms class AccountForm(forms.Form): name = forms.CharField(widget=forms.TextInput(), max_length=15, label='Your Name (why?') However, when I displayed it, the form was autoescaped.

I’ve started to get into Google’s App Engine again, and have started developing a simple product that I had a use for. The initial first draft was a quick 200 lines in webapp, and it worked great. However, I’m starting to find certain things quite cumbersome. I’m a huge fan of Django, and but also about keeping things as simple as possible, which is why I picked webapp to begin with. I’m now considering making a swap to Django, but there are some development issues; namely, I’m using Ubuntu 10.04, Python 2.6, and Django 1.2. This setup presents several setbacks, as GAE has the requirement of Django 1.1 and Python 2.5. There are two solutions that I found: a) use virtualenv, …