task13.py

import re


regex = re.compile('(?P<mac>\S+) +(?P<ip>\S+) +\d+ +\S+ +(?P<vlan>\d+) +(?P<port>\S+)')
result = []

with open(r'C:\Users\bodan\PycharmProjects\ProjectsE\train') as data:
    for line in data:
        match = regex.search(line)
        if match:
            result.append(match.groupdict())

print('К коммутатору подключено {} устройства'.format(len(result)))

for num, comp in enumerate(result, 1):
    print('Параметры устройства {}:'.format(num))
    for key in comp:
        print('{:10}: {:10}'.format(key,comp[key]))



regex1 = ('Host \S+ '
         'in vlan (\d+) '
         'is flapping between port '
         '(\S+) and port (\S+)')

ports = set()

with open(r'C:\Users\bodan\PycharmProjects\ProjectsE\log') as f:
    for line in f:
        match = re.search(regex1, line)
        if match:
            vlan = match.group(1)
            ports.add(match.group(2))
            ports.add(match.group(3))

print('Петля между портами {} в VLAN {}'.format(', '.join(ports), vlan))