[anonymous@myhost rockbox]$ sudo python2 ipoddfu.py  bootstrap-ipodclassic-r708-20110424.dfu 
Connected to S5L8702 Bootrom DFU mode, USB version 1
Traceback (most recent call last):
  File "ipoddfu.py", line 33, in <module>
    dev.uploadfile(sys.argv[1])
  File "/home/anonymous/rockbox/libipoddfu.py", line 187, in uploadfile
    self.upload(data, exploit)
  File "/home/anonymous/rockbox/libipoddfu.py", line 153, in upload
    data = data + struct.pack("<I", self.crc32(data))
  File "/home/anonymous/rockbox/libipoddfu.py", line 130, in crc32
    crc = (crc >> 8) ^ crc_table[(crc ^ data[i]) & 0xff];
TypeError: unsupported operand type(s) for ^: 'int' and 'str'