[Qgis-developer] QgsVectorLayer

[Jelmer Oosthoek]

Dear all,

 

On the standalone 64-bit QGIS Wien version on Win7 I was able to run the
following code using Python in the OSGeo4W Shell:

 

import os

from PyQt4.QtCore import *

from PyQt4.QtGui import *

from qgis.core import *

from qgis.gui import *

 

qgis_prefix = os.getenv("QGIS_PREFIX_PATH")

QgsApplication.setPrefixPath(qgis_prefix, True)

QgsApplication.initQgis()

 

inshpfile = "test.shp"

layer = QgsVectorLayer(inshpfile, "shapefile", "ogr")

# do stuff with layer

 

As a prerequisite I had to add the following three yellow lines to
OSGeo4W.bat first before running the shell (with Lyon here of course Wien):

 

@echo off

rem Root OSGEO4W home dir to the same directory this script exists in

call "%~dp0\bin\o4w_env.bat"

 

set PYTHONPATH=C:\Program Files\QGIS Lyon\apps\qgis\python

set PATH=C:\Program Files\QGIS Lyon\apps\qgis\bin;%PATH%

set QGIS_PREFIX_PATH=C:\Program Files\QGIS Lyon\apps\qgis

 

rem List available o4w programs

rem but only if osgeo4w called without parameters

@echo on

@if [%1]==[] (cmd.exe /k o-help) else (cmd /c "%*")

 

But since I installed QGIS Pisa and then Lyon, Python crashes at the layer =
QgsVectorLayer(.) line, whether or not I have an actual test.shp available.
The module which causes the crash is QtCore4.dll.

Can someone maybe reproduce the crash? And if so, any idea what might be the
cause?

 

Kind regards,

 

Jelmer Oosthoek

 

Ps. Attached are test.py and test.shp.

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