我试图检查用户是否试图分配一个保留地址。目前我们正在保留前5个和后5个地址以备将来使用。我这样做的方式atm真的很慢，在ipv6交换机的情况下不会有效地工作。有没有其他方法来优化检查？

def verify_ip_subnet(ip_address, subnet_address):
    new_subnet = subnet_address.split('/')[1].strip()
    if int(new_subnet) == 16:
        new_vpn_range = []
        new_vpn_range.append(subnet_address.split('/')[0].strip())
        new_count = 0
        for address in ipaddress.ip_network(subnet_address).hosts():
            if new_count == 0 or new_count == 1 or new_count == 2 or new_count == 3 or new_count == 4 or new_count == 65531 or new_count == 65532 or new_count == 65533:
                new_vpn_range.append(str(address))
                new_count += 1
        if ip_address in new_vpn_range:
            return False
    if int(new_subnet) == 24:
        new_vpn_range = []
        new_vpn_range.append(subnet_address.split('/')[0].strip())
        new_count = 0
        for address in ipaddress.ip_network(subnet_address).hosts():
            if new_count == 0 or new_count == 1 or new_count == 2 or new_count == 3 or new_count == 4 or new_count == 251 or new_count == 252 or new_count == 253:
                new_vpn_range.append(str(address))
                new_count += 1
            if ip_address in new_vpn_range:
                return False

以下是导入的示例：

ip_address = '10.8.0.5'
subnet_address = '10.8.0.0/16'

另一种方法是使用num_addresses在这种情况下我可以检查前5个保留的地址，但是如果我试图检查最后5个地址，索引就会超出范围。下面是一个我如何检查它们的例子：

ip_check = ipaddress.ip_network(subnet_address)
for i in range(6):
    if str(ip_check[i]) == ip_address:
        return False

last_address = ip_check.num_addresses
print(last_address)
print(ip_check[last_address])