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I wrote a pyqgis script that should iterate over a folder with xyz files, check if the bouding box overlaps with a polygon in my QGIS project and if yes, it should copy the file into a new folder.

I don't get an error message but nothing happens either. My output Folder remains empty. I just don't see the problem. Can someone please help me find the error, I've already spent too much time on this. 

def moveFiles(self):
    mask = self.getBoundingBox() #BoundingBox of polygon layer
    inputDir = self.dlg.input_folder.text() #directory of xyz files - "Users/denni/Desktop/xyz_data"
    outDir = self.dlg.output_folder.text()  #output directory - "C:/Users/denni/Desktop/output/"
    crs = "EPSG:25832"

    for file in glob.glob("*.xyz"):
        uri = "file:///" + inputDir +"/"+ file + "?type=csv&delimiter=%s&crs=%s&xField=%s&yField=%s" % (" ", crs, "field_1", "field_2")
        name = file.replace('.xyz', '')
        lyr = QgsVectorLayer(uri, name, "delimitedtext")
        lyr.selectAll()
        lyr.boundingBoxOfSelected()
        outputPath = outDir + file
        self.iface.addVectorLayer(file)

        if mask.xMinimum() <= lyr.xMinimum() <= mask.xMaximum() and mask.yMinimum() <= lyr.yMinimum() <= mask.yMaximum():
            QgsVectorFileWriter.writeAsVectorFormat(lyr, outputPath, 'utf-8', lyr.crs(), "CSV", layerOptions='GEOMETRY=AS_XYZ')
        if mask.xMinimum() <= lyr.xMaximum() <= mask.xMaximum() and mask.yMinimum() <= lyr.yMinimum() <= mask.yMaximum():
            QgsVectorFileWriter.writeAsVectorFormat(lyr, outputPath, 'utf-8', lyr.crs(), "CSV", layerOptions='GEOMETRY=AS_XYZ')
        if mask.xMinimum() <= lyr.xMaximum() <= mask.xMaximum() and mask.yMinimum() <= lyr.yMaximum() <= mask.yMaximum():
            QgsVectorFileWriter.writeAsVectorFormat(lyr, outputPath, 'utf-8', lyr.crs(), "CSV", layerOptions='GEOMETRY=AS_XYZ')
        if mask.xMinimum() <= lyr.xMinimum() <= mask.xMaximum() and mask.yMinimum() <= lyr.yMaximum() <= mask.yMaximum():
            QgsVectorFileWriter.writeAsVectorFormat(lyr, outputPath, 'utf-8', lyr.crs(), "CSV", layerOptions='GEOMETRY=AS_XYZ')

I'm using QGIS 3.4

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1 Answer 1

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Type of layerOptions should be list of strings, not just string. Try to change layerOptions='GEOMETRY=AS_XYZ' as layerOptions=['GEOMETRY=AS_XYZ'].

writeAsVectorFormat documentation:

writeAsVectorFormat(..., layerOptions: Iterable[str] = [], ...)

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  • yes that was the issue, thanks for that :)
    – DGIS
    Commented Feb 26, 2020 at 19:36
  • The next error message is strange again. Its telling me ''QgsVectorLayer' object has no attribute 'xMinimum" But mask = self.getBoundingBox() gets the bounding box as a QgsRectangle and according to the documentation (qgis.org/api/…) I can access the xMinimum with xMinimum(). Any ideas what the problem here is?
    – DGIS
    Commented Feb 26, 2020 at 19:49
  • The error is about lyr.xMinimum(), not mask.xMinimum.
    – Kadir Şahbaz
    Commented Feb 26, 2020 at 20:33
  • 2
    Use extent = lyr.extent(), then if mask.xMinimum() <= extent.xMinimum().
    – Kadir Şahbaz
    Commented Feb 26, 2020 at 20:37
  • That solved the 2nd problem, thank you very much! There was also a 3rd problem that I had to use elif instead of if. But now it finally works
    – DGIS
    Commented Feb 26, 2020 at 21:13

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