[Eric] Failure to try PySide

[Algis Kabaila]

Hi Detlev,

I am a real fan of Eric - it is a great program and a teaching tool as 
well.  For this reason i want to draw your attention to a situation 
where Eric fails.  For the record, I use the binaries from ubuntu 
10.10 repositories, including Eric - 4.4.4a (r3717).  I attempted to 
try our PySide,  which in essence is an early incarnation of a clone 
of PyQt.  My OS is kubuntu 10.10.  I suspect that OS is the real  
cause of my problems and I am considering of moving to a gnome version 
of ubuntu for my programming exercises, which may well make Eric more 
robust.

This is my very simple trial program to to test PySide against PyQt:

#!/usr/bin/env python
''' trypyside.py - minimal try program'''

import sys

DEFAULT = 0
# default = 1 -> use PyQt, else use PySide

if DEFAULT:    
    from PyQt4 import (QtGui, QtCore)
else:
    from PySide  import (QtGui, QtCore)
    
class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    frame = MainWindow()
    frame.show()
    app.exec_()

In Eric  it fails on  line 19 (app = QtGui.QApplication(sys.argv) with 
an error message "The debugger program raised the exception TypeError 
"bad argument for a built in operation".

The same program from a command line works OK and here is the dialog:

ak at supremo:/dat/work/PySide/simplest$ ./trypyside.py 
(3641) KSharedDataCache::Private::mapSharedMemory: Opening cache 
"/var/tmp/kdecache-ak/icon-cache.kcache" page size is 4096
(3641) KSharedDataCache::Private::mapSharedMemory: Attached to cache, 
determining if it must be initialized
(3641) KSharedDataCache::Private::mapSharedMemory: Cache fully 
initialized -- attached to memory mapping
(3641) KSharedDataCache::Private::mapSharedMemory: 4370432 bytes 
available out of 10485760
ak at supremo:/dat/work/PySide/simplest$ 

There are other glitches in Eric, which I believe is related to the 
PyKDE4 that is present due to KDE in kubuntu.  I will try to 
communicate about these glitches in a separate communication.  
Actually, I do not understand how and why PyKDE4 interacts the way it 
does with Eric.

Al.

-- 
Algis Kabaila
http://akabaila.pcug.org.au/