PYQGIS 3 Using the ouptut from GRASS v.distance algorithmGRASS v.distance in QGIS not workingUsing v.distance python script parameter with PyQGIS?PyQGIS scripts outside of QGIS GUI running processing algorithms from GRASS providerWhy does the algorithm shortestpathpointtopoint in QGIS3 using pyqgis only work in the second run?Output layer from PyQGIS 3 processing script is emptyProcessing algorithm doesen't work in standalone script - PyQGIS 3.4Error in Graphical Modeler when converting raster to vectorpyqgis processing, grass: --overwrite does not workRename fields of shapefile using PyQGIS 3Returning a new vector layer with additional setup from a processing algorithm in QGIS 3
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PYQGIS 3 Using the ouptut from GRASS v.distance algorithm
GRASS v.distance in QGIS not workingUsing v.distance python script parameter with PyQGIS?PyQGIS scripts outside of QGIS GUI running processing algorithms from GRASS providerWhy does the algorithm shortestpathpointtopoint in QGIS3 using pyqgis only work in the second run?Output layer from PyQGIS 3 processing script is emptyProcessing algorithm doesen't work in standalone script - PyQGIS 3.4Error in Graphical Modeler when converting raster to vectorpyqgis processing, grass: --overwrite does not workRename fields of shapefile using PyQGIS 3Returning a new vector layer with additional setup from a processing algorithm in QGIS 3
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I have a script which is trying to run v.distance on two existing shape files,
buildings.shp which containing some polygons and singleasn.shp which contains a single point. This will be run from the console using QGIS 3.4
Using the algorithm via the Processing toolbox works fine, but the code has a problem.
I'm using the following python code:
e = buildings_layer.extent()
extents_str = str(e.xMinimum()) +"," + str(e.yMinimum()) +"," + str(e.xMaximum()) +"," + str( e.yMaximum())
parameters = 'from':'C:QGISProjectsQGIS3 Devarea 1buildings.shp',
'from_type':[0,1,3],
'to':'C:QGISProjectsQGIS3 Devarea 1singleasn.shp',
'to_type':[0,1,3],
'dmax':-1,
'dmin':-1,
'upload':[0],
'column':['calculated'],
'to_column':None,
'from_output':'memory:nearest',
'output':'memory:distance',
'GRASS_REGION_PARAMETER':extents_str,
'GRASS_SNAP_TOLERANCE_PARAMETER':-1,
'GRASS_MIN_AREA_PARAMETER':0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER':0,
'GRASS_VECTOR_DSCO':'',
'GRASS_VECTOR_LCO':'',
'GRASS_VECTOR_EXPORT_NOCAT':False
algout = processing.run('grass7:v.distance', parameters)
for ft in algout['output'].getFeatures():
#do something here#
The algorithm appears to run ok, but when it reaches the for loop i get the following error:
AttributeError: 'str' object has no attribute 'getFeatures'
Similar code to this worked for a native algorithm but not for a grass one - is there a difference in the output and if so how do I address it?
grass qgis-3 algorithm pyqgis-3
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
add a comment |
I have a script which is trying to run v.distance on two existing shape files,
buildings.shp which containing some polygons and singleasn.shp which contains a single point. This will be run from the console using QGIS 3.4
Using the algorithm via the Processing toolbox works fine, but the code has a problem.
I'm using the following python code:
e = buildings_layer.extent()
extents_str = str(e.xMinimum()) +"," + str(e.yMinimum()) +"," + str(e.xMaximum()) +"," + str( e.yMaximum())
parameters = 'from':'C:QGISProjectsQGIS3 Devarea 1buildings.shp',
'from_type':[0,1,3],
'to':'C:QGISProjectsQGIS3 Devarea 1singleasn.shp',
'to_type':[0,1,3],
'dmax':-1,
'dmin':-1,
'upload':[0],
'column':['calculated'],
'to_column':None,
'from_output':'memory:nearest',
'output':'memory:distance',
'GRASS_REGION_PARAMETER':extents_str,
'GRASS_SNAP_TOLERANCE_PARAMETER':-1,
'GRASS_MIN_AREA_PARAMETER':0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER':0,
'GRASS_VECTOR_DSCO':'',
'GRASS_VECTOR_LCO':'',
'GRASS_VECTOR_EXPORT_NOCAT':False
algout = processing.run('grass7:v.distance', parameters)
for ft in algout['output'].getFeatures():
#do something here#
The algorithm appears to run ok, but when it reaches the for loop i get the following error:
AttributeError: 'str' object has no attribute 'getFeatures'
Similar code to this worked for a native algorithm but not for a grass one - is there a difference in the output and if so how do I address it?
grass qgis-3 algorithm pyqgis-3
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
add a comment |
I have a script which is trying to run v.distance on two existing shape files,
buildings.shp which containing some polygons and singleasn.shp which contains a single point. This will be run from the console using QGIS 3.4
Using the algorithm via the Processing toolbox works fine, but the code has a problem.
I'm using the following python code:
e = buildings_layer.extent()
extents_str = str(e.xMinimum()) +"," + str(e.yMinimum()) +"," + str(e.xMaximum()) +"," + str( e.yMaximum())
parameters = 'from':'C:QGISProjectsQGIS3 Devarea 1buildings.shp',
'from_type':[0,1,3],
'to':'C:QGISProjectsQGIS3 Devarea 1singleasn.shp',
'to_type':[0,1,3],
'dmax':-1,
'dmin':-1,
'upload':[0],
'column':['calculated'],
'to_column':None,
'from_output':'memory:nearest',
'output':'memory:distance',
'GRASS_REGION_PARAMETER':extents_str,
'GRASS_SNAP_TOLERANCE_PARAMETER':-1,
'GRASS_MIN_AREA_PARAMETER':0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER':0,
'GRASS_VECTOR_DSCO':'',
'GRASS_VECTOR_LCO':'',
'GRASS_VECTOR_EXPORT_NOCAT':False
algout = processing.run('grass7:v.distance', parameters)
for ft in algout['output'].getFeatures():
#do something here#
The algorithm appears to run ok, but when it reaches the for loop i get the following error:
AttributeError: 'str' object has no attribute 'getFeatures'
Similar code to this worked for a native algorithm but not for a grass one - is there a difference in the output and if so how do I address it?
grass qgis-3 algorithm pyqgis-3
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
I have a script which is trying to run v.distance on two existing shape files,
buildings.shp which containing some polygons and singleasn.shp which contains a single point. This will be run from the console using QGIS 3.4
Using the algorithm via the Processing toolbox works fine, but the code has a problem.
I'm using the following python code:
e = buildings_layer.extent()
extents_str = str(e.xMinimum()) +"," + str(e.yMinimum()) +"," + str(e.xMaximum()) +"," + str( e.yMaximum())
parameters = 'from':'C:QGISProjectsQGIS3 Devarea 1buildings.shp',
'from_type':[0,1,3],
'to':'C:QGISProjectsQGIS3 Devarea 1singleasn.shp',
'to_type':[0,1,3],
'dmax':-1,
'dmin':-1,
'upload':[0],
'column':['calculated'],
'to_column':None,
'from_output':'memory:nearest',
'output':'memory:distance',
'GRASS_REGION_PARAMETER':extents_str,
'GRASS_SNAP_TOLERANCE_PARAMETER':-1,
'GRASS_MIN_AREA_PARAMETER':0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER':0,
'GRASS_VECTOR_DSCO':'',
'GRASS_VECTOR_LCO':'',
'GRASS_VECTOR_EXPORT_NOCAT':False
algout = processing.run('grass7:v.distance', parameters)
for ft in algout['output'].getFeatures():
#do something here#
The algorithm appears to run ok, but when it reaches the for loop i get the following error:
AttributeError: 'str' object has no attribute 'getFeatures'
Similar code to this worked for a native algorithm but not for a grass one - is there a difference in the output and if so how do I address it?
grass qgis-3 algorithm pyqgis-3
grass qgis-3 algorithm pyqgis-3
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
asked Apr 2 at 14:23
K. OsborneK. Osborne
385
385
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You are trying to iterate over a string variable. Check out the output. Execute print(processing.algorithmHelp('grass7:v.distance')) to get help information for this algorithm:
----------------
Outputs
----------------
from_output: <QgsProcessingOutputVectorLayer>
Nearest
output: <QgsProcessingOutputVectorLayer>
Distance
None
answered 2 days ago
Mr. CheMr. Che
1,594528
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You are trying to iterate over a string variable. Check out the output. Execute print(processing.algorithmHelp('grass7:v.distance')) to get help information for this algorithm:
----------------
Outputs
----------------
from_output: <QgsProcessingOutputVectorLayer>
Nearest
output: <QgsProcessingOutputVectorLayer>
Distance
None
answered 2 days ago
Mr. CheMr. Che
1,594528
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
add a comment |
You are trying to iterate over a string variable. Check out the output. Execute print(processing.algorithmHelp('grass7:v.distance')) to get help information for this algorithm:
----------------
Outputs
----------------
from_output: <QgsProcessingOutputVectorLayer>
Nearest
output: <QgsProcessingOutputVectorLayer>
Distance
None
answered 2 days ago
Mr. CheMr. Che
1,594528
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
add a comment |
You are trying to iterate over a string variable. Check out the output. Execute print(processing.algorithmHelp('grass7:v.distance')) to get help information for this algorithm:
----------------
Outputs
----------------
from_output: <QgsProcessingOutputVectorLayer>
Nearest
output: <QgsProcessingOutputVectorLayer>
Distance
None
answered 2 days ago
Mr. CheMr. Che
1,594528
You are trying to iterate over a string variable. Check out the output. Execute print(processing.algorithmHelp('grass7:v.distance')) to get help information for this algorithm:
----------------
Outputs
----------------
from_output: <QgsProcessingOutputVectorLayer>
Nearest
output: <QgsProcessingOutputVectorLayer>
Distance
None
answered 2 days ago
Mr. CheMr. Che
1,594528
answered 2 days ago
Mr. CheMr. Che
1,594528
answered 2 days ago
Mr. CheMr. Che
1,594528
answered 2 days ago
Mr. CheMr. Che
1,594528
1,594528
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
add a comment |
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
Ok, yes, Thanks for the tip, I see that and there appears to be two other accepted data types, QgsProperty and QGSProcessingOutputLayerDefinition. How do I get the output of the algorithm into one of these other types? Or How can I convert the string into a useable format to iterate over?
– K. Osborne
2 days ago
add a comment |
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