Python：json写入

保存JSON

import json

data = {
    "name": "Alice",
    "age": 25,
    "skills": ["Python", "AI", "RAG"],
    "active": True
}

with open("data.json", "w", encoding="utf-8") as f:
    json.dump(data, f, ensure_ascii=False, indent=2)

生成的 data.json 会是：

{
  "name": "Alice",
  "age": 25,
  "skills": [
    "Python",
    "AI",
    "RAG"
  ],
  "active": true
}

参数说明

• ensure_ascii=False
  保留中文，不会变成 \u4e2d\u6587
• indent=2
  美化格式（缩进 2 个空格）
• encoding="utf-8"
  防止中文乱码

不可JSON化的对象处理

import json

data = {
    "nodes": {"A", "B", "C"}  # set 不能直接 dump
}

with open("data.json", "w", encoding="utf-8") as f:
    json.dump(data, f, ensure_ascii=False, indent=2, default=list)

default=list 会把 set 转成 list

函数封装

import json
from pathlib import Path

def save_dict_to_json(data: dict, path: str | Path):
    path = Path(path)
    with path.open("w", encoding="utf-8") as f:
        json.dump(data, f, ensure_ascii=False, indent=2)

用法：

save_dict_to_json(result_dict, "results.json")