How to use the graphyte.Sender function in graphyte

"""Unit tests for the graphyte module."""

import re
try:
    import socketserver
except ImportError:
    import SocketServer as socketserver  # Python 2.x compatibility
import time
import unittest

import graphyte


class TestSender(graphyte.Sender):
    def __init__(self, *args, **kwargs):
        graphyte.Sender.__init__(self, 'dummy_host', *args, **kwargs)
        self.messages = []

    def send_socket(self, message):
        self.messages.append(message)

    def pop_message(self):
        assert self.messages, 'no messages sent'
        return self.messages.pop(0)


class TestHandler(socketserver.BaseRequestHandler):
    messages = []

    def handle(self):

def init(*args, **kwargs):
    """Initialize default Sender instance with given args."""
    global default_sender
    default_sender = Sender(*args, **kwargs)

parser.add_argument('-s', '--server', default='localhost',
                        help='hostname of Graphite server to send to, default %(default)s')
    parser.add_argument('-p', '--port', type=int, default=2003,
                        help='port to send message to, default %(default)d')
    parser.add_argument('-u', '--udp', action='store_true',
                        help='send via UDP instead of TCP')
    parser.add_argument('-t', '--timestamp', type=int,
                        help='Unix timestamp for message (defaults to current time)')
    parser.add_argument('-q', '--quiet', action='store_true',
                        help="quiet mode (don't log send to stdout)")
    args = parser.parse_args()

    if not args.quiet:
        logging.basicConfig(level=logging.INFO, format='%(message)s')

    sender = Sender(args.server, port=args.port, log_sends=not args.quiet,
                    protocol='udp' if args.udp else 'tcp')
    sender.send(args.metric, args.value, timestamp=args.timestamp)