new_contents: #!/usr/bin/python
  """A script which generates DHCP configuration for hosts matching a regex.
  Usage:
      gen_dhcpconf.py <regex> <compute_resource>
  e.g.
      gen_dhcpconf.py 'ssi2+' 'Online Engineering'
  """
  
  import re
  import sys
  
  from psphere.client import Client
  
  client = Client()
  
  host_regex = sys.argv[1]
  p = re.compile(host_regex)
  compute_resource = sys.argv[2]
  
  cr = client.find_entity_view("ComputeResource",
                               filter={"name": compute_resource})
  
  for vm in sorted(cr.resourcePool.vm):
      if p.match(vm.name) is None:
          continue
  
      print("host %s {" % vm.name)
      print("    option host-name \"%s\";" % vm.name)
      nic_found = False
      for device in vm.config.hardware.device:
          if "macAddress" in device:
              print("    hardware ethernet %s;" % device["macAddress"])
              nic_found = True
      if nic_found is False:
          print("ERROR: Did not find a NIC to get MAC address from.")
          sys.exit(1)
      try:
          print("    fixed-address %s;" % vm.guest.ipAddress)
      except AttributeError:
          print("    fixed-address ")
      print("}")
  
  client.logout()
  
subject: Add an example which generates DHCP configuration