Update RPC with simpler methods for connecting

examples/calculator_client.py

@@ -32,8 +32,8 @@ at the given address and does some RPCs')
     return parser.parse_args()
 
 
-def main(sock):
-    client = capnp.TwoPartyClient(sock)
+def main(host):
+    client = capnp.TwoPartyClient(host)
 
     # Pass "calculator" to ez_restore (there's also a `restore` function that
     # takes a struct or AnyPointer as an argument), and then cast the returned
@@ -282,11 +282,4 @@ def main(sock):
     print("PASS")
 
 if __name__ == '__main__':
-    host, port = parse_args().host.split(':')
-
-    sock = socket.create_connection((host, port))
-
-    # Set TCP_NODELAY on socket to disable Nagle's algorithm. This is not
-    # neccessary, but it speeds things up.
-    sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
-    main(sock)
+    main(parse_args().host)