如何进行基于非唯一键的json合并？

import json

def merge_json(json_list):
    result = {}
    for json_data in json_list:
        for key, value in json_data.items():
            if key in result:
                # 根据具体需求进行合并操作，这里以追加为例
                if isinstance(result[key], list):
                    result[key].append(value)
                else:
                    result[key] = [result[key], value]
            else:
                result[key] = value
    return result

# 示例数据
json1 = '{"name": "Alice", "age": 25, "hobbies": ["reading", "painting"]}'
json2 = '{"name": "Bob", "gender": "male", "hobbies": ["music", "sports"]}'
json3 = '{"name": "Charlie", "age": 30, "country": "USA"}'

# 解析JSON数据
data1 = json.loads(json1)
data2 = json.loads(json2)
data3 = json.loads(json3)

# 合并JSON数据
merged_data = merge_json([data1, data2, data3])

# 转换为JSON格式
merged_json = json.dumps(merged_data)
print(merged_json)