[PyQt] A Qt error pushed me out of Python

Shriramana Sharma samjnaa at gmail.com
Fri Apr 13 15:37:02 BST 2007

Please see the following session transcript:

$ python
Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> from PyQt4 . QtGui import QMessageBox
 >>> QMessageBox . critical ( None, "FOO", "FOO" )
QWidget: Must construct a QApplication before a QPaintDevice

Notice that I was pushed OUT of Python! It did not just raise an error 
and allow me to remain within Python to fix it. Looks like the error 
raised by Qt was not handling intelligently.

I request comments on why this is happening and should it happen like 
this. If not, can it be fixed?


Shriramana Sharma.

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