对于嵌套json中的新值，在python中进行for循环迭代。

{
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "Anytown",
        "zipcode": "12345"
    },
    "contacts": [
        {
            "type": "email",
            "value": "john@example.com"
        },
        {
            "type": "phone",
            "value": "555-1234"
        }
    ]
}

import json

# 示例嵌套JSON
nested_json = {
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "Anytown",
        "zipcode": "12345"
    },
    "contacts": [
        {
            "type": "email",
            "value": "john@example.com"
        },
        {
            "type": "phone",
            "value": "555-1234"
        }
    ]
}

def iterate_nested_json(data):
    if isinstance(data, dict):
        for key, value in data.items():
            if isinstance(value, (dict, list)):
                iterate_nested_json(value)
            else:
                print(f"{key}: {value}")
    elif isinstance(data, list):
        for item in data:
            iterate_nested_json(item)

# 调用函数
iterate_nested_json(nested_json)