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。 sh-3ll

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DIR:/opt/hc_python/lib64/python3.12/site-packages/sqlalchemy/dialects/postgresql/
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# dialects/postgresql/operators.py
# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
# mypy: ignore-errors
from ...sql import operators


_getitem_precedence = operators._PRECEDENCE[operators.json_getitem_op]
_eq_precedence = operators._PRECEDENCE[operators.eq]

# JSON + JSONB
ASTEXT = operators.custom_op(
    "->>",
    precedence=_getitem_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
)

JSONPATH_ASTEXT = operators.custom_op(
    "#>>",
    precedence=_getitem_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
)

# JSONB + HSTORE
HAS_KEY = operators.custom_op(
    "?",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

HAS_ALL = operators.custom_op(
    "?&",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

HAS_ANY = operators.custom_op(
    "?|",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

# JSONB
DELETE_PATH = operators.custom_op(
    "#-",
    precedence=_getitem_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
)

PATH_EXISTS = operators.custom_op(
    "@?",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

PATH_MATCH = operators.custom_op(
    "@@",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

# JSONB + ARRAY + HSTORE + RANGE
CONTAINS = operators.custom_op(
    "@>",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

CONTAINED_BY = operators.custom_op(
    "<@",
    precedence=_eq_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
    is_comparison=True,
)

# ARRAY + RANGE
OVERLAP = operators.custom_op(
    "&&",
    precedence=_eq_precedence,
    is_comparison=True,
)

# RANGE
STRICTLY_LEFT_OF = operators.custom_op(
    "<<", precedence=_eq_precedence, is_comparison=True
)

STRICTLY_RIGHT_OF = operators.custom_op(
    ">>", precedence=_eq_precedence, is_comparison=True
)

NOT_EXTEND_RIGHT_OF = operators.custom_op(
    "&<", precedence=_eq_precedence, is_comparison=True
)

NOT_EXTEND_LEFT_OF = operators.custom_op(
    "&>", precedence=_eq_precedence, is_comparison=True
)

ADJACENT_TO = operators.custom_op(
    "-|-", precedence=_eq_precedence, is_comparison=True
)

# HSTORE
GETITEM = operators.custom_op(
    "->",
    precedence=_getitem_precedence,
    natural_self_precedent=True,
    eager_grouping=True,
)