[GIS] Attribute error:’NoneType’ object has no attribute

arcgis-desktoparctoolboxgeoprocessingpython

I tried to run a python script for getting the coordinate system of a feature/shapefile as follow

>>> import arcpy  
>>> from arcpy import env  
>>> env.workspace="D:\data"  
>>> fc="river.shp"  
>>> dsc=arcpy.Describe(fc)  
>>> dsc.spatialReference.Name  
>>> print dsc

i'm getting following error at line 5

Attributeerror:'NoneType' object has no attribute Name.

Best Answer

Replacing this line:

env.workspace="D:\data"

with:

env.workspace=r"D:\data"

env.workspace="D:/data"

env.workspace="D:\\data"

should enable it to work but, if you are using ArcGIS 10.1 like me, you will also need to use ".Name" without the capital i.e. ".name".

My working test code:

import arcpy
from arcpy import env
env.workspace=r"C:\temp"
fc="test2.shp"
dsc=arcpy.Describe(fc)
print dsc.spatialReference.name

returns this (as expected):

GCS_GDA_1994

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[GIS] Error getting while creating new field to a shapefile table

This is because 'my.shp' did not open successfully or the file did not exist, thus source is None.

It's a good idea to test if the file exists, and to see if the file opened properly:

import os
from osgeo import ogr, gdal

fname = 'my.shp' # change this for your example

if not os.path.isfile(fname):
    raise IOError('Could not find file ' + str(fname))
source = ogr.Open(fname, gdal.GA_Update)
if source is None:
    raise IOError('Could open file ' + str(fname))
...

[GIS] ‘QgsVectorDataProvider’ object has no attribute ‘select’

I've tried your code, but it not work. It can't find selected feature. So, I make an edit from your code. This is the edited code:

def selectFeature(self, point, button):
        pntGeom = QgsGeometry.fromPoint(point)
        pntBuff = pntGeom.buffer((self.canvas.mapUnitsPerPixel() * 2), 0)
        rect = pntBuff.boundingBox()

        cLayer = self.canvas.currentLayer()
        selectList = []
        if cLayer:
            rq = QgsFeatureRequest(rect)
            for feature in cLayer.getFeatures(rq):
                print feature
                if feature.geometry().intersects(rect):
                    selectList.append(feature.id())

            cLayer.setSelectedFeatures(selectList)
        else:
            print "No layer selected on TOC"

        print selectList

I am sorry I can't add this answer as comment, because my reputation are not enough. I hope this can help others.

Best Answer

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[GIS] ‘QgsVectorDataProvider’ object has no attribute ‘select’

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