Modify python script to include all subdirectories in inputfolder

#RasterDataInfo.py
#
#Author
#  Dan Patterson
#Purpose
#  Lists the properties of raster data and optionally writes to a file.
#
#Properties (right-click on the tool and specify the following)
#General
#  Name  RasterDataInfo
#  Label Raster Data Info
#  Desc  List rasters in a folder.
#        All raster classes within the folder will be described.
#        You can optionally create a text file containing all output.
#        Simply select an output folder then specify an output filename.
#
#Source script RasterDataInfo.py
#
#Parameter list  (examples below)
#                                                Parameter Properties
#           Display Name          Data type      Type      Direction  MultiValue
#  argv[1]  Select a folder       Workspace      Required  Input      No
#  argv[2]  Output text filename  Optional       Optional  Input      No
#--------------------------------------------------------------------
#Import the standard modules
#  Get the folder
#  Get an optional output filename
#  Get a list of feature classes (shapefiles)
#  cycle through the list and add their names to the messages
#
import win32com.client, sys, os, string
gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
#
gp.workspace=sys.argv[1]
aFileName=sys.argv[2]
#
aMessage="\n" + "Raster data in folder: " + gp.workspace + "\n"
s2="  "
s4="    "
#
#Determine if output is to go to a file as well
#
if aFileName <> '#':         #check to see if a filename is specified
  aFile=open(aFileName, 'w')
  aFile.write(aMessage + "\n")
  gp.AddMessage("\n" + "Output saved to: " + aFileName + "\n" + "Processing..." + "\n")
else:
  gp.AddMessage("\n" +aMessage + "\n" + "Optional text file not created")
 
aLst=gp.ListRasters("*", "all")  #a list, change as desired
aLst.reset()
aRaster=aLst.next()         #an element in a list
#
aCounter = 0
#
while aRaster:
  desc=gp.Describe(aRaster)
  aCounter = aCounter + 1
  if aFileName <> '#':
    gp.addMessage(str(aCounter) + s2 + str(desc.CatalogPath))
    #
  outList = []
  outList.append(str(aCounter) + s2 + str(desc.CatalogPath))
  outList.append(s4 + "Dataset type:  " + str(desc.DataSetType))
  outList.append(s4 + "Format:  " + str(desc.Format))
  outList.append(s4 + "Compression type:  " + str(desc.CompressionType))
  outList.append(s4 + "Sensor type:  " + str(desc.SensorType))
  outList.append(s4 + "Table type:  " + str(desc.TableType))
  outList.append(s4 + "Primary field:  " + str(desc.PrimaryField))
  outList.append(s4 + "Pixel type:  " + str(desc.PixelType))
  outList.append(s4 + "Is integer:  " + str(desc.IsInteger))
  #if str(desc.Format) == "GRID":
  #  rasterNoData = s4 + "NoData value:  " + str(desc.NoDataValue)
  outList.append(s4 + "Number of bands:  " + str(desc.BandCount))
  outList.append(s4 + "Height: " + str(desc.Height))
  outList.append(s4 + "Width: " + str(desc.Width))
  outList.append(s4 + "Raster Cell Height: " + str(desc.MeanCellHeight))
  outList.append(s4 + "Raster Cell Width: " + str(desc.MeanCellWidth))
  outList.append(s4 + "Extent: Xmin, Ymin, Xmax, Ymax " + str(desc.Extent))
  #
  #output to messages
  #
  if aFileName <> '#':
    for aVal in outList:
      aFile.write(aVal + "\n")
    aFile.write("\n")
  else:
    for aVal in outList:
      gp.AddMessage(aVal)
 
  aRaster = aLst.next()
gp.AddMessage("Rasters Processed:  " + str(aCounter) + "\n")
#
if aFileName <> '#':
  aFile.flush()
  aFile.close()
  gp.AddMessage("\n")
#
#del gp