new_contents: from bitcoinrpc.authproxy import AuthServiceProxy
  
  #################################################
  #  Sending a transation to the network with RPC #
  #################################################
  
  # ---------------------------------------------------------------------------------------------------------------------
  # The following piece of code serves as an example of how to send a transaction created with any of the pieces of
  # code of the other examples to the P2P network. The code assumes you have access to a Bitcoin node with RPC
  # enabled. RPC authentication details have to be provided in the proper variables.
  #
  # Alternatively, you can also push the transaction to the network with a 3rd party service.
  #
  # Note that this code has an additional dependency: bitcoinrpc
  # This dependency is not required by bitcoin_tools, since it is only used in this example, and most users
  # will not need to use it.
  # ---------------------------------------------------------------------------------------------------------------------
  
  
  # Set RPC configuration
  rpc_user = ""       # set roc user
  rpc_password = ""   # set rpc password
  rpc_server = ""     # set rpc server
  rpc_port = 18332
  
  # Test connection
  rpc_connection = AuthServiceProxy("http://%s:%s@%s:%s" % (rpc_user, rpc_password, rpc_server, rpc_port))
  get_info = rpc_connection.getinfo()
  print get_info
  
  # Send transaction
  # raw_transaction = ...
  # rpc_connection.sendrawtransaction(raw_transaction)
  
subject: Add an example to push raw transaction to the network via RPC