code: def get_metadata_as_csv(fname):
      
      q = chr(34)
      d = ","
      res = q + fname + q + d
      res = res + q + os.path.basename(fname) + q + d
      res = res + q + os.path.dirname(fname) + q + d
      try:
          res = res + q + str(os.path.getsize(fname)) + q + d
          img = Image.open(fname)
          # get the image's width and height in pixels
          width, height = img.size
          res = res + q + str(width) + q + d
          res = res + q + str(height) + q + d
          res = res + q + str(img.format) + q + d
          res = res + q + str(img.palette) + q + d
          stat = ImageStat.Stat(img)
          #print(fname, width, height) 
          #res = res + q + str(stat.extrema) + q + d
          res = res + q + List2String(stat.count, ",") + q + d
          res = res + q + List2String(stat.sum, ",") + q + d
          res = res + q + List2String(stat.sum2, ",") + q + d
          res = res + q + List2String(stat.mean, ",") + q + d
          res = res + q + List2String(stat.median, ",") + q + d
          res = res + q + List2String(stat.rms, ",") + q + d
          res = res + q + List2String(stat.var, ",") + q + d
          res = res + q + List2String(stat.stddev, ",") + q + d
  
          exif_data = get_exif_data(img)
          (lat, lon) = get_lat_lon(exif_data)
          res = res + q + str(lat) + q + d
          res = res + q + str(lon) + q + d
      except Exception as ex:
          print('problem reading image file metadata in ', fname, str(ex))
      return res
docs: Gets all metadata and puts into CSV format