def dpid_offset_range(num_vms):
    """Generate a range of dpid dpid_offset_list
    Every VM has allocates 1000 unique dpid offsets

    Args:
      num_vms (int): The number of virtual machines
      topo_size (int): The number of topology switches
    Returns:
      list: The dpid offset range
    """
    return [i for i in xrange(0, num_vms)]