使用python根据特定值过滤嵌套的json

import json

def filter_json(json_data, target_value):
    if isinstance(json_data, dict):
        filtered_data = {}
        for key, value in json_data.items():
            if value == target_value:
                filtered_data[key] = value
            elif isinstance(value, (dict, list)):
                filtered_value = filter_json(value, target_value)
                if filtered_value:
                    filtered_data[key] = filtered_value
        return filtered_data
    elif isinstance(json_data, list):
        filtered_data = []
        for item in json_data:
            filtered_item = filter_json(item, target_value)
            if filtered_item:
                filtered_data.append(filtered_item)
        return filtered_data
    else:
        return None

# 示例JSON数据
json_data = {
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 ABC Street",
        "city": "New York",
        "country": "USA"
    },
    "friends": [
        {
            "name": "Alice",
            "age": 25
        },
        {
            "name": "Bob",
            "age": 35
        }
    ]
}

# 过滤值为30的JSON数据
filtered_json = filter_json(json_data, 30)
print(json.dumps(filtered_json, indent=4))

{
    "age": 30
}