human
Complete the below
def main():

    ''''Main loop'
    '''
assistant
#Here is the Python code you requested.
    sys.stdin.close()
    interval = 15
    page_size = resource.getpagesize()
    try:
        sockstat = open('/proc/net/sockstat')
        netstat = open('/proc/net/netstat')
        snmp = open('/proc/net/snmp')
    except IOError as e:
        print >>sys.stderr, ('open    failed:    %s' % e)
        return 13
    utils.drop_privileges()
    regexp = re.compile('sockets:    used    \\d+\nTCP:    inuse    (?P<tcp_inuse>\\d+)    orphan    (?P<orphans>\\d+)    tw    (?P<tw_count>\\d+)    alloc    (?P<tcp_sockets>\\d+)    mem    (?P<tcp_pages>\\d+)\nUDP:    inuse    (?P<udp_inuse>\\d+)(?:    mem    (?P<udp_pages>\\d+))?\n(?:UDPLITE:    inuse    (?P<udplite_inuse>\\d+)\n)?RAW:    inuse    (?P<raw_inuse>\\d+)\nFRAG:    inuse    (?P<ip_frag_nqueues>\\d+)    memory    (?P<ip_frag_mem>\\d+)\n')
    def print_sockstat(metric, value, tags=''):
        if (value is not None):
            print ('net.sockstat.%s    %d    %s%s' % (metric, ts, value, tags))
    known_statstypes = {'TcpExt:': 'tcp', 'IpExt:': 'ip', 'Ip:': 'ip', 'Icmp:': 'icmp', 'IcmpMsg:': 'icmpmsg', 'Tcp:': 'tcp', 'Udp:': 'udp', 'UdpLite:': 'udplite', 'Arista:': 'arista'}
    tcp_stats = {'SyncookiesSent': ('syncookies', 'type=sent'), 'SyncookiesRecv': ('syncookies', 'type=received'), 'SyncookiesFailed': ('syncookies', 'type=failed'), 'OfoPruned': ('memory.prune', 'type=drop_ofo_queue'), 'RcvPruned': ('memory.prune', 'type=drop_received'), 'DelayedACKs': ('delayedack', 'type=sent'), 'DelayedACKLocked': ('delayedack', 'type=locked'), 'DelayedACKLost': ('delayedack', 'type=lost'), 'ListenOverflows': ('failed_accept', 'reason=full_acceptq'), 'ListenDrops': ('failed_accept', 'reason=other'), 'TCPForwardRetrans': ('retransmit', 'type=forward'), 'TCPFastRetrans': ('retransmit', 'type=fast'), 'TCPSlowStartRetrans': ('retransmit', 'type=slowstart'), 'TCPRenoRecovery': ('packetloss.recovery', 'type=fast_retransmit'), 'TCPSackRecovery': ('packetloss.recovery', 'type=sack'), 'TCPFACKReorder': ('reording', 'detectedby=fack'), 'TCPSACKReorder': ('reording',...