[PyQt] Large Table Example in PyQt4
david at boddie.org.uk
Sat Dec 22 02:25:52 GMT 2007
On Thu, 20 Dec 2007 16:20:08 -0800 (PST), B Clowers wrote:
> I am fairly new to python and programming as a whole and would like to
> develop a small application capable of plotting simple 2D graphs and also
> display such data in a table. In my initial assessment of PyQt4 I have
> been able to load my data into a table but it is terribly slow. I am
> using a QAbstractTableModel example that I found on the web:
The model looks OK to me. I don't think it's doing anything special that
would cause it to be inefficient.
> This has been useful but if I load a large numpy array (5 x 250,000) into
> this example it is insanely slow. It seems as though there was a
> "bigtable.py" example for PyQt3 but I cannot seem to port this to version
The paradigms for "item views" are different in Qt 3 and Qt 4. I don't think
a solution for PyQt3 will help you much.
> The Qt website also discusses the use of large tables when programming
> C++ but this is out of my league. Does anyone have a simple solution to
> this problem or perhaps a quick example that I can insert a numpy array
> into? Again, I'm pretty new to python but am eager to learn.
It would be interesting if you could run a profiler on your code so that we
can see where the bottlenecks are. I recommend using qPyProfiler for this:
It will be interesting to see where most of the CPU time is being spent.
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