topic Re: Very simple code, don't understand the error in Python Questions

Very simple code, don't understand the error

DanielSchatt — Tue, 30 Jan 2018 20:59:32 GMT

hi, just trying to run a simple code:

>>> import arcpy
... arcpy.CheckOutExtension("Spatial")
... arcpy.env.workspace = "C:\stuff\SCHISM_SLR_stuff\Con_Rasters\Con_0625"
... allRasters = arcpy.ListRasters("*","TIF")
... for eachRaster in allRasters:
...    theRaster = Raster(eachRaster)
...    outRaster = 6.25 - theRaster
...    outRaster.save(eachRaster.replace('.tif','_Final.tif'))

The error is:
Runtime error
Traceback (most recent call last):
File "<string>", line 6, in <module>
NameError: name 'Raster' is not defined

Thanks for any help!

Dan

Re: Very simple code, don't understand the error

XanderBakker — Tue, 30 Jan 2018 21:12:06 GMT

It should be "arcpy.Raster" instead of "Raster"

Also put an r before the workspace location:

arcpy.env.workspace = r"C:\stuff\SCHISM_SLR_stuff\Con_Rasters\Con_0625"‍

Re: Very simple code, don't understand the error

JoshuaBixby — Tue, 30 Jan 2018 21:12:06 GMT

What command is "Raster" supposed to be?

Re: Very simple code, don't understand the error

XanderBakker — Tue, 30 Jan 2018 21:20:04 GMT

It converts a path to a raster into a raster object that allows you to the substract the rasters with the need to use the Minus tool.

Re: Very simple code, don't understand the error

DanielSchatt — Tue, 30 Jan 2018 21:35:08 GMT

Thanks Xander!