Re: [Qgis-user] getFeatures() and fields()

2018-10-30 Thread Roberto Herrero 
You are right, Nyall. The problem was the path of the vector layer.

Thank you,
Roberto

El lun., 29 oct. 2018 a las 23:54, Nyall Dawson ()
escribió:

> On Tue, 30 Oct 2018 at 06:39, Roberto Herrero 
> wrote:
> >
> > getFeatures() and fields() do not seem to work in Qgis3.2
>
> They 100% work -- if they didn't, QGIS wouldn't be good for anything
> except wasting some space on your computer ;)
>
> > # Open vector layer
> > LayerName = u'Vector_layer.shp'
> > VectorLayer = qgis.core.QgsVectorLayer(LayerName, 'mylayer', 'ogr')
>
> I suspect this is where the issue sits -- try checking
>
> assert VectorLayer.isValid()
>
> here. My suspicion is that your relative path 'Vector_layer.shp' is
> not working, and will need to be an absolute path.
>
> Nyall
>
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Re: [Qgis-user] getFeatures() and fields()

2018-10-29 Thread Nyall Dawson 
On Tue, 30 Oct 2018 at 06:39, Roberto Herrero  wrote:
>
> getFeatures() and fields() do not seem to work in Qgis3.2

They 100% work -- if they didn't, QGIS wouldn't be good for anything
except wasting some space on your computer ;)

> # Open vector layer
> LayerName = u'Vector_layer.shp'
> VectorLayer = qgis.core.QgsVectorLayer(LayerName, 'mylayer', 'ogr')

I suspect this is where the issue sits -- try checking

assert VectorLayer.isValid()

here. My suspicion is that your relative path 'Vector_layer.shp' is
not working, and will need to be an absolute path.

Nyall
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[Qgis-user] getFeatures() and fields()

2018-10-29 Thread Roberto Herrero 
getFeatures() and fields() do not seem to work in Qgis3.2

I'm running the following pyqgis script:

=
#!/usr/bin/python
# -*- coding: utf8 -*-

import qgis.core

# Open vector layer
LayerName = u'Vector_layer.shp'
VectorLayer = qgis.core.QgsVectorLayer(LayerName, 'mylayer', 'ogr')
# Get the list of features
featureList = []
for feature in VectorLayer.getFeatures():
featureList.append(feature)
print("Feature list size = " + str(len(featureList)))
# Make a list with the field names
fieldList = VectorLayer.fields()
print("Field list size = " + str(len(fieldList)))
for field in VectorLayer.fields():
print(field.name(), field.typeName())


Both the features and the field list have zero size. However, when loaded
manually, the vector layer contains fields and features.

Any idea?

Thank you very much,
Roberto Herrero
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