在嵌套的json的子级中计算一个值，并将其作为新元素添加到原始嵌套的json中。

import json

def calculate_value(json_obj):
    if isinstance(json_obj, dict):  # 判断是否为JSON对象
        for key, value in json_obj.items():
            if isinstance(value, dict) or isinstance(value, list):
                calculate_value(value)  # 递归处理子级
            else:
                # 进行计算，并将计算结果添加为新元素到原始JSON中
                json_obj[key + '_new'] = value * 2
    elif isinstance(json_obj, list):  # 判断是否为JSON数组
        for item in json_obj:
            calculate_value(item)  # 递归处理子级

# 示例的嵌套JSON数据
nested_json = {
    "name": "Alice",
    "age": 25,
    "address": {
        "city": "Shanghai",
        "country": "China"
    },
    "friends": [
        {
            "name": "Bob",
            "age": 30
        },
        {
            "name": "Charlie",
            "age": 35
        }
    ]
}

calculate_value(nested_json)
print(json.dumps(nested_json, indent=4))

{
    "name": "Alice",
    "age": 25,
    "address": {
        "city": "Shanghai",
        "country": "China"
    },
    "friends": [
        {
            "name": "Bob",
            "age": 30,
            "name_new": "BobBob",
            "age_new": 60
        },
        {
            "name": "Charlie",
            "age": 35,
            "name_new": "CharlieCharlie",
            "age_new": 70
        }
    ],
    "name_new": "AliceAlice",
    "age_new": 50,
    "address_new": {
        "city": "ShanghaiShanghai",
        "country": "ChinaChina"
    }
}