def add_raw_inputs(self, inputs, private_key=None):
for i in inputs:<EOL><INDENT>self.ins.append(dict(input=i, private_key=private_key))<EOL>self.change_address = i['<STR_LIT:address>']<EOL><DEDENT>
Add a set of utxo's to this transaction. This method is better to use if you
want more fine control of which inputs get added to a transaction.
`inputs` is a list of "unspent outputs" (they were 'outputs' to previous transactions,
  and 'inputs' to subsiquent transactions).

`private_key` - All inputs will be signed by the passed in private key.