Batch clip multiple rasters error arcpy

Question

I am new to arcpy. I am attempting to batch clip over 350 rasters to one the extent of one mask raster. I tried it in model builder and it wouldn't run so now I am trying it in arcpy but I continue to get error messages.

Here is my code:

import arcpy
import os
import glob
from arcpy import env
arcpy.CheckOutExtension("Spatial")
from arcpy.sa import *

#Sets environment
env.workspace = "E:/AlexandraOrrego/GIS_2017/RasterData/Reclass2.gdb"

mask = "E:/AlexandraOrrego/GIS_2017/Shapefiles/westus_forest"
outputDir = "E:/AlexandraOrrego/GIS_2017/RasterData/clipped.gdb"

rasList = arcpy.ListRasters()
for raster in rasList:  
    outRasterName = raster.replace("r2", "c")
    rasterObject = arcpy.sa.ExtractByMask(raster, mask, outRasterName)
#Saves Raster
    rasterObject.save(os.path.join(outputDir, outRasterName))
#prints once each raster layer has been clipped
    print outRasterName + " Clipped Successfully!"

 Runtime error 
Traceback (most recent call last):
  File "<string>", line 17, in <module>
TypeError: ExtractByMask() takes exactly 2 arguments (3 given)
>>> 

Answer 1

Your error says the function takes 2 inputs but you've supplied 3 parameters. You could be looking at old code (prior to ArcGIS 10.0) where the function did take 3 arguments.

Between v9.3 and v10.0 there is a fundamental change in the handling of rasters by spatial analyst: from version 10 the raster object is a return value, not necessarily persisted to disc, where previously the output was a parameter, implicitly stated and it was the script writers' problem to clean up temporary rasters. From version 10 rasters not saved with raster_object.save(Full_Path) just disappear when the script finishes (so long as the script hasn't crashed!).

Change the extract by mask to rasterObject = arcpy.sa.ExtractByMask(raster, mask) as your output is rasterObject, a return value and not a parameter.

9.3 and prior syntax:

gp.ExtractByMask_sa(InRaster, InMask, OutRaster)

10.0 and newer syntax:

out_raster_object = arcpy.sa.ExtractByMask (in_raster, in_mask_data)
out_raster_object.save(out_raster)

This is a little gotcha when trying to learn or implement old code.