My Technical Blog
Archive for September, 2009
Get Online Users in Django
Sep 22nd
I was upgrading my Django Bookmarks site, and I wanted to list the online users. I searched the internet and I found a simple method, but it doesn’t work properly. So I developed my own method.
Why the simple method didn’t work?
The problem with it is that it depends on the last login date in the user model. This field is updated on every login for the user.
Imagine the following scenario:
* The user X logs in @ 1:00 pm.
* The user X posts a new post @ 1:30 pm.
* The user X comments on a previous post @ 1:35 pm.
* The user X leaves the website @ 1:40 pm.
* The user X comes back to the website @ 3:00 pm.
* The user X is logged in since the session cookie has not expired yet.
* The user X posts a new post @ 3:15 pm.
* A guest enters the website, and looks at the online users corner.
The guest won’t see X’s name in the list of online users, simply because X’s last login date is @ 1 pm, even though user X is now online and he has just posted a new post.
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Loading ...I'm Learning Python part 10 (last one)
Sep 16th
I'm Learning Python part 10
(last one)
Back to blogging
As usual, I will apologize for not blogging for a long time.
I have been very busy, university exams, university projects, job projects, teaching and learning.
Python Course
At Damascus University, in the faculty of informatics we managed to create free courses to students, and I was one of the teachers there, I taught Python to students.
As far as I know this course was the first Python course in Damascus University.
Even though the students were a few (actually a very little few about 8 ~ 10 students) the course was great. We managed to learn Python 2.6 Syntax, a little bit of its standard library and a little bit of PyQt4 in about 7 days x 2 hours daily.
As far as I know too, students understood it and found it great, and I hope they’ll be using this great language more in their programs.
Why last one?
The tour with Python ends here, while it ends here it starts here too, it ends here because so far you’ve learned what you need to start your own path in Python. And it starts here because you’re fully equipped with the base tool to discover more tools, I’ll let you discover the standard library and 3rd-party libraries on your own, because everyone differs in his/her interests.
I’ll be blogging more on more technical issues but they might not be I’m Learning Python series 
.
Let’s stop talking here and move directly to the heart of our last lesson.
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