code: def get_net_start(ipaddr, netmask):
      '''
      Return the address of the network
      '''
      net = ipaddress.ip_network('{0}/{1}'.format(ipaddr, netmask), strict=False)
      return six.text_type(net.network_addressf get_net_start(ipaddr, netmask):
      '''
      Return the address of the network
      '''
      net = ipaddress.ip_network('{0}/{1}'.format(ipaddr, netmask), strict=False)
      return six.text_type(net.network_address)
docs: Return the address of the network