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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def connect(self):
 """Connects to the Graphite server if not already connected."""

    if self.sock is not None:
      return
    backoff = 0.01
    while True:
      try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(5)
        sock.connect((self.host, self.port))
        self.sock = sock
        return
      except socket.error:
        time.sleep(random.uniform(0, 2.0*backoff))
        backoff = min(backoff*2.0, 5.0)