collect show cdp neighbor output

[heiner55]

As you said, it would be better to use dictionary:

#!/usr/bin/python3
import pprint, re

output = [
 '-------------------------',
 'Device ID: Device1',
 'Entry address(es): ',
 '  IP address: 1.1.1.1',
 'Platform: cisco WS-C3560CG-8PC-S,  Capabilities: Switch IGMP ',
 'Interface: GigabitEthernet0/10,  Port ID (outgoing port): GigabitEthernet0/9',
 'Holdtime : 172 sec',
 '',
 'Version :',
 'Cisco IOS Software, C3560C Software (C3560c405ex-UNIVERSALK9-M), Version '
 '15.2(2)E7, RELEASE SOFTWARE (fc3)',
 'Technical Support: http://www.cisco.com/techsupport',
 'Copyright (c) 1986-2017 by Cisco Systems, Inc.',
 'Compiled Wed 12-Jul-17 16:08 by prod_rel_team',
 '',
 'advertisement version: 2',
 'Protocol Hello:  OUI=0x00000C, Protocol ID=0x0112; payload len=27, '
 'value=00000000FFFFFFFF010221FF000000000000BC16F5073B00FF0000',
 "VTP Management Domain: 'VTP1'",
 'Native VLAN: 1',
 'Duplex: full',
 'Management address(es): ',
 '  IP address: 1.1.1.1',
 '',
 '-------------------------',
 'Device ID: Device2',
 'Entry address(es): ',
 '  IP address: 2.2.2.2',
 'Platform: cisco WS-C3560CG-8PC-S,  Capabilities: Switch IGMP ',
 'Interface: GigabitEthernet0/9,  Port ID (outgoing port): GigabitEthernet0/10',
 'Holdtime : 136 sec',
 '',
 'Version :',
 'Cisco IOS Software, C3560C Software (C3560c405ex-UNIVERSALK9-M), Version '
 '15.2(2)E7, RELEASE SOFTWARE (fc3)',
 'Technical Support: http://www.cisco.com/techsupport',
 'Copyright (c) 1986-2017 by Cisco Systems, Inc.',
 'Compiled Wed 12-Jul-17 16:08 by prod_rel_team',
 '',
 'advertisement version: 2',
 'Protocol Hello:  OUI=0x00000C, Protocol ID=0x0112; payload len=27, '
 'value=00000000FFFFFFFF010221FF000000000000A41875F29B00FF0000',
 "VTP Management Domain: 'VTP2'",
 'Native VLAN: 1',
 'Duplex: full',
 'Management address(es): ',
 '  IP address: 2.2.2.2',
 '',
 '',
 'Total cdp entries displayed : 2'
]

device      = { }
device_list = [ ]
for line in output:
    if '-------------------------' in line:
        device       = { }
        device_list += [ device ]

    dev = re.match(r'Device ID: (.*)', line, re.M | re.I)
    if dev:
        device["id"] = dev.group(1)

    ip_adr = re.match(r'  IP address: (.*)', line, re.M | re.I)
    if ip_adr:
        device["ip"] = ip_adr.group(1)

    plat = re.match(r'(.*): (.*),', line, re.M | re.I)
    if plat:
        device["platform"] = plat.group(2)


pprint.pprint(device_list)

Output:
[{'id': 'Device1',
  'ip': '1.1.1.1',
  'platform': ' OUI=0x00000C, Protocol ID=0x0112; payload len=27'},
 {'id': 'Device2',
  'ip': '2.2.2.2',
  'platform': ' OUI=0x00000C, Protocol ID=0x0112; payload len=27'}]