code: def stream(self, f, blank_solutions=False, include_unspents=False, include_witness_data=True):
          
          include_witnesses = include_witness_data and self.has_witness_data()
          stream_struct("L", f, self.version)
          if include_witnesses:
              f.write(b'\0\1')
          stream_struct("I", f, len(self.txs_in))
          for t in self.txs_in:
              t.stream(f, blank_solutions=blank_solutions)
          stream_struct("I", f, len(self.txs_out))
          for t in self.txs_out:
              t.stream(f)
          if include_witnesses:
              for tx_in in self.txs_in:
                  witness = tx_in.witness
                  stream_struct("I", f, len(witness))
                  for w in witness:
                      stream_satoshi_string(f, w)
          stream_struct("L", f, self.lock_time)
          if include_unspents and not self.missing_unspents():
              self.stream_unspents(f)
docs: Stream a Bitcoin transaction Tx to the file-like object f.
  
          :param f: writable file-like object to stream binary data of transaction
          :param blank_solutions: (optional) clear out the solutions scripts, effectively "unsigning" the
              transaction before writing it. Defaults to False
          :param include_unspents: (optional) stread out the Spendable objects after streaming the transaction.
              This is a pycoin-specific extension. Defaults to False.
          :param include_witness_data: (optional) stream segwit transactions including the witness data if the
              transaction has any witness data. Defaults to True.