[show] Fix 'show int neigh expected' (sonic-net#1189)

`show int neighbor expected` only show one member interface for
portchannel with multiple member interfaces. This is because
`device2interface_dict` only stores mapping from one device to one
port.

Signed-off-by: Longxiang Lyu <lolv@microsoft.com>

show/main.py

@@ -695,34 +695,38 @@ def expected(interfacename):
  print("DEVICE_NEIGHBOR_METADATA information is not present.")
  return
 
- #Swap Key and Value from interface: name to name: interface
- device2interface_dict = {}
  for port in natsorted(neighbor_dict.keys()):
  temp_port = port
  if get_interface_mode() == "alias":
  port = iface_alias_converter.name_to_alias(port)
  neighbor_dict[port] = neighbor_dict.pop(temp_port)
- device2interface_dict[neighbor_dict[port]['name']] = {'localPort': port, 'neighborPort': neighbor_dict[port]['port']}
 
  header = ['LocalPort', 'Neighbor', 'NeighborPort', 'NeighborLoopback', 'NeighborMgmt', 'NeighborType']
  body = []
  if interfacename:
- for device in natsorted(neighbor_metadata_dict.keys()):
- if device2interface_dict[device]['localPort'] == interfacename:
- body.append([device2interface_dict[device]['localPort'],
- device,
- device2interface_dict[device]['neighborPort'],
- neighbor_metadata_dict[device]['lo_addr'],
- neighbor_metadata_dict[device]['mgmt_addr'],
- neighbor_metadata_dict[device]['type']])
- else:
- for device in natsorted(neighbor_metadata_dict.keys()):
- body.append([device2interface_dict[device]['localPort'],
+ try:
+ device = neighbor_dict[interfacename]['name']
+ body.append([interfacename,
  device,
- device2interface_dict[device]['neighborPort'],
+ neighbor_dict[interfacename]['port'],
  neighbor_metadata_dict[device]['lo_addr'],
  neighbor_metadata_dict[device]['mgmt_addr'],
  neighbor_metadata_dict[device]['type']])
+ except KeyError:
+ click.echo("No neighbor information available for interface {}".format(interfacename))
+ return
+ else:
+ for port in natsorted(neighbor_dict.keys()):
+ try:
+ device = neighbor_dict[port]['name']
+ body.append([port,
+ device,
+ neighbor_dict[port]['port'],
+ neighbor_metadata_dict[device]['lo_addr'],
+ neighbor_metadata_dict[device]['mgmt_addr'],
+ neighbor_metadata_dict[device]['type']])
+ except KeyError:
+ pass
 
  click.echo(tabulate(body, header))