code: def address_in_network(ip, net):
      
      ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
      netaddr, bits = net.split('/')
      netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
      network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
      return (ipaddr & netmask) == (network & netmask)
docs: This function allows you to check if an IP belongs to a network subnet
  
      Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
               returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
  
      :rtype: bool