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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setKey(self, key):
 """RFB protocol for authentication requires client to encrypt challenge sent by server with password using DES method. However, bits in each byte of the password are put in reverse order before using it as encryption key."""

        newkey = []
        for ki in range(len(key)):
            bsrc = ord(key[ki])
            btgt = 0
            for i in range(8):
                if bsrc & (1 << i):
                    btgt = btgt | (1 << 7-i)
            newkey.append(chr(btgt))
        super(RFBDes, self).setKey(newkey)