在不知道父变量名称的情况下如何查找JSON变量？

import json

def find_variable(json_obj, target_variable):
    for key, value in json_obj.items():
        if isinstance(value, dict):
            # 如果属性值是对象类型，则递归调用find_variable函数
            result = find_variable(value, target_variable)
            if result is not None:
                return result
        elif value == target_variable:
            # 如果属性值与目标变量匹配，则返回该变量
            return value

# 示例JSON对象
json_str = '''
{
    "person": {
        "name": "John",
        "age": 30,
        "address": {
            "street": "123 Main St",
            "city": "New York"
        }
    },
    "company": {
        "name": "ABC Inc",
        "employees": 100
    }
}
'''

# 将JSON字符串解析为JSON对象
json_obj = json.loads(json_str)

# 查找目标变量
target_variable = "New York"
result = find_variable(json_obj, target_variable)

if result is not None:
    print("找到目标变量:", result)
else:
    print("未找到目标变量")