Hi,
I need to update fields in a feature class based on values from another feature class (with different geometry). Some of the features have multiple values and are handled in a separate loop to the other values.
I have hacked something together that works with my test data, but using multiple SelectLayerByAttribute to get values from the other feature class makes it run much slower than I think it should. There must be a Python data structure I can use instead (like a dictionary with FID as key and LandCover as value) that will be faster and make my code more 'Pythonic'.
Any suggestions appreciated!
Thanks,
Matt
I need to update fields in a feature class based on values from another feature class (with different geometry). Some of the features have multiple values and are handled in a separate loop to the other values.
I have hacked something together that works with my test data, but using multiple SelectLayerByAttribute to get values from the other feature class makes it run much slower than I think it should. There must be a Python data structure I can use instead (like a dictionary with FID as key and LandCover as value) that will be faster and make my code more 'Pythonic'.
Any suggestions appreciated!
Code:
with arcpy.da.UpdateCursor(paddock, fields) as cursor:
for row in cursor:
#print row
for i in singleList:
#print i
if row[0] == i[0]:
arcpy.SelectLayerByAttribute_management(fc, "NEW_SELECTION", """"FID" = {0}""".format(i[0]))
landCover = list(r.LandCover for r in arcpy.SearchCursor(fc))
#print "updating.... " + landCover[0]
row[1] = landCover[0]
cursor.updateRow(row)
for i in dupList:
#print i
if row[0] == i[0]:
arcpy.SelectLayerByAttribute_management(fc, "NEW_SELECTION", """"FID" = {0}""".format(i[0]))
landcoverList = list((r.LandCover,r.Shape_Area) for r in arcpy.SearchCursor(fc))
maxlandCover = max(landcoverList, key=lambda x: x[1])
landCover = list(maxlandCover)[0]
#print "updating.... " + landCover
row[1] = landCover
cursor.updateRow(row)Matt