如何在JSON对象中获得两个数字之间的最大差异

import json

def get_max_difference(json_obj):
    max_diff = float('-inf')  # 初始化最大差异为负无穷大

    def traverse(obj):
        nonlocal max_diff

        if isinstance(obj, dict):  # 如果是字典类型
            for key, value in obj.items():
                if isinstance(value, (int, float)):  # 如果值是数字类型
                    if max_diff < value:
                        max_diff = value
                else:
                    traverse(value)  # 递归遍历值

        elif isinstance(obj, list):  # 如果是列表类型
            for item in obj:
                traverse(item)  # 递归遍历元素

    traverse(json_obj)
    return max_diff

# 示例JSON对象
json_str = '''
{
  "name": "John",
  "age": 30,
  "scores": [85, 90, 78, 92],
  "grades": {
    "math": 95,
    "english": 88,
    "science": 92
  }
}
'''

# 解析JSON对象
json_obj = json.loads(json_str)

# 获取最大差异值
max_difference = get_max_difference(json_obj)

print("最大差异值:", max_difference)