Generating new output names after each iteration

Sam_Roodbar

Hello Everyone, 

I'm trying to write a script that will take a look at a list of county boundaries and then take each boundary and use it as a mask on a raster so that I can do Extract By Mask. Ideally I would like to have the county names on the output but I cannot figure out a way to do that, but any unique name at this point would do. Here is the script that I use:

>>> import os
>>> import arcpy
>>> from arcpy import env
>>> from arcpy.sa import *
>>> env.workspace = "C:/Users/s/Desktop/S/test"
>>> inRaster = "escrec"
>>> counter = 1
>>> ctyList = arcpy.ListFeatureClasses ("*.shp")
>>> for shp in ctyList:
... out = arcpy.sa.ExtractByMask(inRaster,shp)
... out.save("C:/Users/s/Desktop/test/out/masked"+ counter)
... counter = counter+2
...
>>>

I tried using this counter thing but it doesn't work due to concatenate issue (str and numbers). Anyone has any suggestions or tricks that they have done? I tried setting the counter as my "ctyList" but since feature have .shp it doesn't allow that to save.

extract by mask‌ acrpy# 

Sam_Roodbar

I worked out another way to do the same, much easier:

>>> import os
>>> import arcpy
>>> from arcpy import env
>>> env.workspace = "C:\xyz"
>>> ctyList = arcpy.ListFeatureClasses ("*.shp")
>>> inRaster = "nlcdrecmosaic"
>>> for shp in ctyList:
... CtyName = shp.split('.')[0]
... out= arcpy.sa.ExtractByMask(inRaster,shp)
... out.save("C:\xyz\out\mskd"+ CtyName)
...