Dear List,
I'd like to remove an existing file (see [tempOutput]) after it was used
by a geoalgorithm. The geoalgorithm works perfectly but after its
execution, the file [tempOutput] is locked.
Here a simple test script that returns "[Error 32] The process cannot
access the file because it is being used by another process:
'D:/test_alg/map_to_clip.tif'":
import processing
import os
tempOutput = 'D:/test_alg/map_to_clip.tif'
maskFN = 'D:/test_alg/mask.shp'
output = 'D:/test_alg/clipped_map.tif'
algRes = processing.runalg("gdalogr:cliprasterbymasklayer",
tempOutput,
maskFN,
"-9999",False,False,False,5,4,75,6,1,False,0,False,"",
output)
try:
os.remove(tempOutput)
except Exception as e:
print e
I also found a solution on the web [1] but it doesn't work for me :( If
I understand correctly, the trick is to load the file as layer and then
release it. Here its implementation:
import processing
import os
tempOutput = 'D:/test_alg/map_to_clip.tif'
maskFN = 'D:/test_alg/mask.shp'
output = 'D:/test_alg/clipped_map.tif'
algRes = processing.runalg("gdalogr:cliprasterbymasklayer",
tempOutput,
maskFN,
"-9999",False,False,False,5,4,75,6,1,False,0,False,"",
output)
try:
# add to the map
tempLay = QgsRasterLayer(tempOutput, "tempLay")
if not tempLay.isValid(): raise Exception("Failed to load tempLay")
QgsMapLayerRegistry.instance().addMapLayer(tempLay) #!!!!
layermap = QgsMapLayerRegistry.instance().mapLayers()
for i, layer in layermap.iteritems():
print 'layername',layer.source()
if layer.source() == tempOutput:
# Remove layer references
QgsMapLayerRegistry.instance().removeMapLayer(layer.id()) #!!!!
# Delete the file
os.remove(tempOutput)
except Exception as e:
print e
I didn't find any other solution for the moment. Any suggestion is
really very appreciate!
Thanks
enrico
[1]
https://gis.stackexchange.com/questions/93143/can-not-delete-file-after-using-runalg-function
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