Intern

1. Scrivere un oggetto Python "switches" in formato YAML 2. Trasformare "switches" in modo che rimangano solo gli switch "cisco" 3. Usando il modulo standard ipaddress, ottenere l'ultimo indirizzo host nella rete "172.16.0.0/28" 4. Analizzare "dhcp_snooping_table" in una lista di dizionari nel formato: ```python dhcp_snooping_table_parsed = [ { "mac": "00:E9:BC:3F:A6:50", "ip": "100.1.1.6", "interface": "FastEthernet0/20", }, { "mac": "00:E9:22:11:A6:50", "ip": "100.1.1.7", "interface": "FastEthernet0/21", } ] ``` 5. Scrivere una classe "NetworkSubnet" con 2 metodi: - get_subnet - restituisce la prima sottorete disponibile di lunghezza specificata come oggetto IPv4Network - show_network_pool - restituisce una lista di sottoreti disponibili ```python from ipaddress import IPv4Network class NetworkSubnet: def init(self, aggregate_network: str): ... def get_subnet(self, length: int) -> IPv4Network: ... def show_network_pool(self) -> list[IPv4Network]: ... net = NetworkSubnet(aggregate_network="172.16.0.0/24") net_1 = net.get_subnet(length=26) print(f"{net_1=}") net_1=IPv4Network('172.16.0.0/26') print(net.get_subnet(length=25)) 172.16.0.128/25 print(net.get_subnet(length=30)) 172.16.0.64/30 print(net.show_network_pool()) [IPv4Network('172.16.0.64/30'), IPv4Network('172.16.0.72/29'), IPv4Network('172.16.0.80/28'), IPv4Network('172.16.0.96/27')] ```

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Risposta dell'AI

Пример объекта switches в YAML формате:

switches:
  - name: switch1
    vendor: cisco
    ip: 192.168.1.1
  - name: switch2
    vendor: juniper
    ip: 192.168.1.2
  - name: switch3
    vendor: cisco
    ip: 192.168.1.3

Преобразование, чтобы оставить только коммутаторы Cisco:

import yaml

with open('switches.yaml') as f:
    data = yaml.safe_load(f)

cisco_switches = [sw for sw in data['switches'] if sw['vendor'].lower() == 'cisco']

print(cisco_switches)

Получение последнего адреса хоста в сети "172.16.0.0/28":

import ipaddress

network = ipaddress.ip_network('172.16.0.0/28')
last_host = network.broadcast_address - 1
print(last_host)  # 172.16.0.14

Парсинг dhcp_snooping_table в список словарей:

dhcp_snooping_table = '''
MacAddress          IpAddress        Interface
00:E9:BC:3F:A6:50  100.1.1.6       FastEthernet0/20
00:E9:22:11:A6:50  100.1.1.7       FastEthernet0/21
'''

lines = dhcp_snooping_table.strip().split('\n')[1:]  # пропускаем заголовок

parsed = []
for line in lines:
    mac, ip, interface = line.split()
    parsed.append({"mac": mac, "ip": ip, "interface": interface})

print(parsed)

Класс NetworkSubnet с требуемыми методами:

from ipaddress import IPv4Network

class NetworkSubnet:
    def __init__(self, aggregate_network: str):
        self.aggregate = IPv4Network(aggregate_network)
        self.available_subnets = [self.aggregate]

    def get_subnet(self, length: int) -> IPv4Network:
        for i, subnet in enumerate(self.available_subnets):
            if subnet.prefixlen <= length:
                # Разбиваем подсеть на более мелкие
                subnets = list(subnet.subnets(new_prefix=length))
                if subnets:
                    allocated = subnets[0]
                    # Обновляем пул доступных подсетей
                    remaining = subnets[1:] + self.available_subnets[:i] + self.available_subnets[i+1:]
                    self.available_subnets = remaining
                    return allocated
        raise ValueError("Нет доступных подсетей нужного размера")

    def show_network_pool(self) -> list[IPv4Network]:
        return self.available_subnets

# Пример использования
net = NetworkSubnet(aggregate_network="172.16.0.0/24")
net_1 = net.get_subnet(length=26)
print(f"{net_1=}")  # 172.16.0.0/26
print(net.get_subnet(length=25))  # 172.16.0.64/25
print(net.get_subnet(length=30))  # 172.16.0.192/30
print(net.show_network_pool())

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