I have two steps here. First select layer by attributes. Second convert polygon to raster. It failed when it goes to second step and kept giving me error 999999: Error executing function. I pasted my codes below. Is there anyone who has the same problem. I am now using Arcgis 10.1 and has SP1 installed.
exec(''' import arcpy from arcpy import env arcpy.env.overwriteOutput = True arcpy.CheckOutExtension("spatial") import string env.workspace = "G:\\countoverlap" # Local variables: FRAP_Fire111 = "G:\\countoverlap\\FRAP_Fire111.shp" fldName = 'Year' fcName = 'FRAP_Fire111.shp' #set creates a unique value iterator from the value field yearList = list(set([row.getValue(fldName) for row in arcpy.SearchCursor(fcName)])) print(yearList) ''') env.workspace = "G:\\countoverlap" env.scratchWorkspace = "G:\\countoverlap\\overlap.gdb" arcpy.MakeFeatureLayer_management(FRAP_Fire111, "lyr") for year in yearList[1:len(yearList)]: print(str(year)) # Process: Select Layer By Attribute arcpy.SelectLayerByAttribute_management("lyr","NEW_SELECTION", '"Year" = year' ) print('Layer_Seclected') # Process: Polygon to Raster # Set local variables inFeatures = "lyr" valField = "Year" outRaster = "str(env.workspace)+'\\'+str(year)+'.tif'" assignmentType = "MAXIMUM_AREA" priorityField = "NONE" cellSize = 1080 # Execute PolygonToRaster arcpy.PolygonToRaster_conversion(inFeatures, valField, outRaster, assignmentType, priorityField, cellSize) print('Raster_Created')