I have created a script (see below) that works ok but only in case if all parameters are required inputs. Quite simple, Roads(line) and Tracts(polygon) feature classes , first buffer Roads and then clip to Tracts. There are more feature classes in Zion.gdb but I am just doing a test script to figure out optional input parameters.
What I need is that user should be able to select the layer they want to buffer, the layer they want to clip, the output location/name of the clip, and the buffer distance. All of it has to be optional. The problem is when I set for example Tracts and Tracts_Clip feature classes to optional in Script Parameters and do not apply them in script execution because I want only Roads buffer, the script does not work. Disregard red x symbol, I shortened the path.
Any help would be much appreciated!!!
import arcpy
import arcpy from arcpy import env # set environment settings env.workspace = "C:/data/Zion.gdb" env.overwriteOutput = True # Script arguments Roads = arcpy.GetParameterAsText(0) if Roads == '#' or not Roads: Roads = arcpy.GetParameterAsText(0) # provide a default value if unspecified Tracts = arcpy.GetParameterAsText(1) if Tracts == '#' or not Tracts: Tracts = arcpy.GetParameterAsText(1) # provide a default value if unspecified Tracts_Clip = arcpy.GetParameterAsText(2) if Tracts_Clip == '#' or not Tracts_Clip: Tracts_Clip = arcpy.GetParameterAsText(2) # provide a default value if unspecified Buffer_Distance = arcpy.GetParameterAsText(3) if Buffer_Distance == '#' or not Buffer_Distance: Buffer_Distance = arcpy.GetParameterAsText(3) # provide a default value if unspecified # Local variables: Tracts_Clip = arcpy.GetParameterAsText(2) Buffer_Distance = arcpy.GetParameterAsText(3) Roads_Buffer = "Roads_Buffer" # Process: Buffer arcpy.Buffer_analysis(Roads, Roads_Buffer, Buffer_Distance,"FULL", "ROUND", "ALL", "", "") # Process: Clip (1) arcpy.Clip_analysis(Tracts, Roads_Buffer, Tracts_Clip, "")
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