def getCliInstance():
	global _dbcli
	if not _dbcli:
		_dbcli = DatabaseHelper()
	return _dbcli
def _createSocket(self):
        try:
            sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            self.sock = sock
            return 0
        except socket.error as e:
            sys.stderr.write("[!]\tFailed to create a UDP socket.\n%s.\n" % e)
            return 1