[Qgis-developer] QGIS 0.9 on windows:QgsApplication.setPrefixPath() has an invalid type

[Aaron Racicot]

Hmmm... strange.  I am not sure why your first statement that is wrapped
with a str() is returning a PyQt4.QtCore.QStringRef object... I don't see
that.  There seems to be some strangeness with strings in your python
install.  Can you show what version of qgis, python, pyqt, qt, and how you
installed them?  

I guess we just need to start at the beginning and peel away the onion until
we get to the reason...

A

+----------------------------------------+
 Aaron Racicot - GIS Programmer   
 360.221.2441 - aaronr at ecotrust.org          
+----------------------------------------+
 e c o t r u s t                        
 pobox 1614
 langley wa 98260
 www.ecotrust.org                       
+----------------------------------------+

-----Original Message-----
From: Jesse Ayers [mailto:jrayers at u.washington.edu] 
Sent: Tuesday, July 31, 2007 11:41 AM
To: 'Aaron Racicot'; qgis-developer at lists.qgis.org
Subject: RE: [Qgis-developer] QGIS 0.9 on
windows:QgsApplication.setPrefixPath() has an invalid type

Here you go:

>>> from qgis.core import *
>>> str(QgsApplication.prefixPath())
'<PyQt4.QtCore.QStringRef object at 0x00BA1DF8>'
>>> QgsApplication.setPrefixPath("C:/Program Files/qgis0.9.0preview1", True)

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    QgsApplication.setPrefixPath("C:/Program Files/qgis0.9.0preview1", True)
TypeError: argument 1 of QgsApplication.setPrefixPath() has an invalid type
>>> str(QgsApplication.prefixPath())
'<PyQt4.QtCore.QStringRef object at 0x0318C6F0>'
>>> 


Thanks!

--Jesse

 

>-----Original Message-----
>From: Aaron Racicot [mailto:aaronr at z-pulley.com] 
>Sent: Tuesday, July 31, 2007 11:37 AM
>To: 'Jesse Ayers'; qgis-developer at lists.qgis.org
>Subject: RE: [Qgis-developer] QGIS 0.9 on 
>windows:QgsApplication.setPrefixPath() has an invalid type
>
>Hi there Jesse,
>
>Can you try to just hit this function from the command line like:
>
>aaronr at z-linux2:~/work/$ 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 qgis.core import *
>>>> str(QgsApplication.prefixPath())
>''
>>>> QgsApplication.setPrefixPath("/usr/local",True)
>>>> str(QgsApplication.prefixPath())
>'/usr/local'
>>>>
>
>This will let us know if things are at least working in theory 
>and we can track down why it is not working in your case.
>
>A
>
>+----------------------------------------+
> Aaron Racicot - GIS Programmer   
> 360.221.2441 - aaronr at ecotrust.org          
>+----------------------------------------+
> e c o t r u s t                        
> pobox 1614
> langley wa 98260
> www.ecotrust.org                       
>+----------------------------------------+
>
>-----Original Message-----
>From: qgis-developer-bounces at lists.qgis.org
>[mailto:qgis-developer-bounces at lists.qgis.org] On Behalf Of Jesse Ayers
>Sent: Tuesday, July 31, 2007 11:19 AM
>To: qgis-developer at lists.qgis.org
>Subject: [Qgis-developer] QGIS 0.9 on 
>windows:QgsApplication.setPrefixPath()
>has an invalid type
>
>When attempting to run the \2_basic_main_window\mainwindow.py 
>script from the tutorials available here:
>http://mapserver.sk/~wonder/qgis/tutorials.tar.gz
>
>I receive this error:
>
>Traceback (most recent call last):
>  File "mainwindow.py", line 110, in <module>
>    main(sys.argv)
>  File "mainwindow.py", line 94, in main
>    QgsApplication.setPrefixPath(qgis_prefix, True)
>TypeError: argument 1 of QgsApplication.setPrefixPath() has an 
>invalid type
>
>Looking here
>(http://svn.qgis.org/api_doc/html/classQgsApplication.html#4f54
>0de6bcbc9ec14
>dcf0499a9371c42) it would appear that a string is expected, 
>which is what the mainwindow.py script above passes.
>
>Any ideas on solving this?
>
>Thanks in advance
>
>--
>Jesse Ayers
>Center for Urban Simulation and Policy Analysis University of 
>Washington www.urbansim.org
>
>
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