晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/imunify360/venv/lib/python3.11/site-packages/defence360agent/migrations/075_ips_as_int.py
import logging

import peewee as pw
import ipaddress


logger = logging.getLogger(__name__)


def migrate(migrator, database, fake=False, **kwargs):
    """Write your migrations here."""
    IPListNew = migrator.orm["iplist_new"]
    IPList = migrator.orm["iplist"]

    def iplist_select():
        # FIXME: remove this function after migrating to peewee 3
        try:
            yield from IPList.select(IPList).dicts().iterator()
        except RuntimeError:
            return

    try:
        from im360.utils.net import pack_ip_network
    except ImportError:
        pass
    else:
        with database.atomic():
            for ip_obj in iplist_select():
                try:
                    ip = ipaddress.ip_network(ip_obj["ip"])
                except ValueError:
                    # malformed ip
                    continue

                net, mask, version = pack_ip_network(ip)

                ip_obj.update(
                    {
                        "network_address": net,
                        "netmask": mask,
                        "version": version,
                    }
                )
                try:
                    IPListNew.insert(ip_obj).execute()
                except pw.IntegrityError as e:
                    logger.warning("Error inserting IP: %s", e)

    migrator.sql("DROP TABLE iplist")
    migrator.sql("ALTER TABLE iplist_new RENAME TO iplist")
    migrator.sql('CREATE INDEX "iplist_listname" ON "iplist" ("listname")')
    migrator.sql('CREATE INDEX "iplist_expiration" ON "iplist" ("expiration")')
    migrator.sql('CREATE INDEX "iplist_ip" ON "iplist" ("ip")')


def rollback(migrator, database, fake=False, **kwargs):
    """Write your rollback migrations here."""
    pass

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