import arcpy
from arcpy import env


desc= arcpy.env.extent("D:GIS @ UTDSem 1GISC 6317LabLab 10tempTahoeTahoeEmererelev.grid")

print desc

import arcpy

elevRaster = arcpy.sa.Raster('C:/data/elevation')
myExtent = elevRaster.extent

print myExtent

import arcpy

from arcpy.sa import *

elevRaster = Raster('C:/arcgis/ArcTutor/3DAnalyst/Exercise2/workspace2/congrd')

myExtent = elevRaster.extent

print myExtent