Unable to load shapefile in PyQGIS

Question

I've been trying to load a .shp file using PyQGIS, but layer.isValid() is always false. I've tried looking around at past solutions for the problem and nothing is working for me. This is my code currently:

from qgis.core import *
from PyQt4.QtGui import QApplication

app = QApplication([])
QgsApplication.setPrefixPath('C:\\OSGeo4W\\apps\\qgis\\', True)
QgsApplication.initQgis()

layer = QgsVectorLayer('C:\\path\\to\\file.shp', 'name', 'ogr')
print layer.isValid()

I've also tried using forward slashes instead of double backslashes in my paths, which doesn't work either. I'm on Windows 10, running Python 2.7.5 with OSGeo4W.

You probably need to set your paths correctly. You could run this batch file described in this post before running your script. — Joseph, Nov 28 '17 at 10:39

score 1 · Accepted Answer · answered Nov 28 '17 at 06:29

1

Try using the app reference:

app = QApplication([])
app.setPrefixPath('C:\\OSGeo4W\\apps\\qgis\\', True)
app.initQgis()

answered Nov 28 '17 at 06:29

gsherman

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Unable to load shapefile in PyQGIS

1 Answers1