Diving into pyQt

I started learning pyQt and as far as I can tell I'm quite happy with my book. While I didn't have this big expectations on the book reading it is a quite a joy.

The author starts by introducing python itself, but in a way also interesting to people experienced with python. Of course there are mentioned all the basic concepts in python but also some less known topics like things that are new in python 2.5 and even 2.6.

So now I'm at the point of general principles on hand-coded dialog layout and the signal and slot concept. While having learned pyGtk and wxWidgets more from reading the reference it is really nice having everything introduced by well explained code examples.

Comments

niklas said…
In case you ever have any thoughts or questions about Qt I might be able to help you. Im not very experienced with Qt, but just finished a school project using Qt and are working on another small Qt project at the moment. Anyways Id love to help if I can.
8:45 PM
Post a Comment

Popular posts from this blog

Realtime bokeh plotting with asyncio

Now and then the need arises to plot data in realtime. I know how simple this is using LabView but I always pefer Python for its versatility in data analysis.
However when it comes to plotting data in realtime I have never seen any easy solution for Python.

For my daily plotting needs I mostly use matplotlib but the Bokeh project is currently ahead when it comes to interactive plotting for the web.

Another exciting development has been Python3's asyncio which is python's native approach to an event driven framework. This puts python in the spotlight for io-bound applications for which people would use node.js.

Combing the Bokeh and asyncio allows building an interactive, realtime plotting application in less then 30 lines of code. I did not find any official documentation on how to do this so I decided to provide my own adapted from the official example here. I suggest to have a look at the official example to get a better understanding how the asyncio version works. In essen…
Read more

Dry-Ice Canon fun

Image
Use frozen carbon dioxide (dry ice), mix it with water and pipe the steam into a PET bottle. When the bottle at roughly 22bar explodes you can shoot for example a toy chicken over more than 80 meters (We had serious problems to build a projectile that is not destroyed by the power of the launch). We built the device for a creativity competition at our university.
And well, we could not place an object accurate on 20m but for shure we did it with the biggest impact.


Music on Amazon and iTunes

If you are curious, here some detail about the construction:

For us secure handling was not only an option. We have seen some people that put water and dry-ice together into an bottle close it and put it into a pipe. But you have good chances that it will explode in your hands. So we put an PET bottle into our pipe and connect it with an CNC made adapter to the presure reservoir outside. Beside that, all parts are made from steel and welded. We experienced that a 1.5l coke bottle (actually we used Dei…
Read more

cacti and friends

Image
The last days I spent some time installing digitemp sensors on my watercooling system and setting up cacti to graph the temperatures.
For reading the sensors I use this little python script:

from subprocess import Popen, PIPE, STDOUT
from string import *
from sys import *

process = Popen("digitemp_DS9097 -q -c /etc/digitemp.conf -r2000 -a", shell=True, stdout=PIPE, stderr=STDOUT)

identifiers = argv[1:]
identifiers = map(lambda x: x+":",identifiers)


n = len(identifiers)
values = [.0]*n
valuecount = 0

for line in process.stdout:
line = line.split()
values[valuecount] = line[6]
valuecount += 1

output = ""
for i,j in zip(identifiers,values):
j = str(j)
output += (i+j+" ")
print output

It is called by cacti using

python /scripts/check_digitemp.py cool air hot out

The parameters given to the script are simply labels of your choice. Just make shure they fit the number of sensors installed.
Also make sure /etc/digitemp.conf exists and the cacti user (in my case www-data…
Read more