比较2个嵌套的Json数组，通过Json B覆盖和合并Json A

import json

def merge_json(json_a, json_b):
    # 解析Json A和Json B
    data_a = json.loads(json_a)
    data_b = json.loads(json_b)

    # 遍历Json B中的每个元素
    for key, value in data_b.items():
        # 检查Json B中的元素是否存在于Json A中
        if key in data_a:
            # 根据需求选择覆盖或合并的方式进行操作
            # 这里选择合并方式，将Json B中的元素合并到Json A中
            data_a[key].update(value)
        else:
            # 如果Json B中的元素在Json A中不存在，将其添加到Json A中
            data_a[key] = value

    # 将最终的Json A转换回Json格式
    merged_json = json.dumps(data_a)
    return merged_json

# 示例数据
json_a = '{"name": "John", "age": 30, "hobbies": ["reading", "running"]}'
json_b = '{"age": 31, "hobbies": ["swimming", "painting"], "city": "New York"}'

# 调用合并函数
merged_json = merge_json(json_a, json_b)
print(merged_json)

{"name": "John", "age": 31, "hobbies": ["swimming", "painting"], "city": "New York"}