'Constructor
@param dev_name: network device name
@param exclude_devices: list of pci slots to exclude'

def __init__(self, dev_name, exclude_devices):

    self.dev_name = dev_name
    self.pci_slot_map = {}
    self.pci_dev_wrapper = pci_lib.PciDeviceIPWrapper(dev_name)
    self._load_devices(exclude_devices)
