Saving output in ArcPy For-Loop?

Question

How can I save the output of my For loop so that I have a different output name each time?

This is the code I´m using:

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = r'C:\Users\lhark\Desktop\SHK\ArcGis_Proj_Canada\shapefiles'
outworkspace = r'C:\Users\lhark\Desktop\SHK\ArcGis_Proj_Canada\KernelDensity'    
fcList = arcpy.ListFeatureClasses ()
for fc in fcList:
    outKDens = KernelDensity(fc,"NONE",4670)

Answer 1

ListFeatureClasses returns a list of strings, each string is a name (filename) of the FeatureClasses found in your workspace directory. Now KernelDensity returns a raster object that can be saved to disk with the methode save().

What i would now is name the Rasters to the feature class name extended by "_kd" like here:

import arcpy
from arcpy import env
from arcpy.sa import *
import os
env.workspace = r'C:\Users\lhark\Desktop\SHK\ArcGis_Proj_Canada\shapefiles'
outworkspace = r'C:\Users\lhark\Desktop\SHK\ArcGis_Proj_Canada\KernelDensity'    
fcList = arcpy.ListFeatureClasses ()
for fc in fcList:
    outKDens = KernelDensity(fc,"NONE",4670)
    outKDens.save(outworkspace + "/" + os.path.splitext(fc)[0] + "_kd")

If you like to save your output to geotiff (can handle long filenames!), use this extension explicitly:

    outKDens.save(outworkspace + "/" + os.path.splitext(fc)[0] + "_kd.tif")

Answer 2

If you look at the help file for the Kernel Density tool, at the bottom is a code sample showing you how to save a raster with a different name.