code: def xdr(self):
          
          kp = Xdr.StellarXDRPacker()
          kp.pack_PublicKey(self.account_xdr_object())
          return base64.b64encode(kp.get_buffer())
docs: Generate base64 encoded XDR PublicKey object.
  
          Return a base64 encoded PublicKey XDR object, for sending over the wire
          when interacting with stellar.
  
          :return: The base64 encoded PublicKey XDR structure.