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　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。 . Prv8 Shell

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Current File : //opt/imunify360/venv/lib/python3.11/site-packages/playhouse/psycopg3_ext.py

from peewee import *

try:
    import psycopg
    #from psycopg.types.json import Jsonb
except ImportError:
    psycopg = None


class Psycopg3Database(PostgresqlDatabase):
    def _connect(self):
        if psycopg is None:
            raise ImproperlyConfigured('psycopg3 is not installed!')
        conn = psycopg.connect(dbname=self.database, **self.connect_params)
        if self._isolation_level is not None:
            conn.isolation_level = self._isolation_level
        conn.autocommit = True
        return conn

    def get_binary_type(self):
        return psycopg.Binary

    def _set_server_version(self, conn):
        self.server_version = conn.pgconn.server_version
        if self.server_version >= 90600:
            self.safe_create_index = True

    def is_connection_usable(self):
        if self._state.closed:
            return False

        # Returns True if we are idle, running a command, or in an active
        # connection. If the connection is in an error state or the connection
        # is otherwise unusable, return False.
        conn = self._state.conn
        return conn.pgconn.transaction_status < conn.TransactionStatus.INERROR

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