自定义attr_reader以执行属性的延迟实例化

from tencentcloud.common import credential
from tencentcloud.common.exception.tencent_cloud_sdk_exception import TencentCloudSDKException
from tencentcloud.cvm.v20170312 import cvm_client, models

# 使用您的腾讯云账户凭证初始化客户端
cred = credential.Credential("SecretID", "SecretKey")
client = cvm_client.CvmClient(cred, "ap-guangzhou")  # 指定地域

# 声明一个名为 "example_attr" 的属性，并设置值为 "example_value"
instance = models.Instance()
instance.set_example_attr("example_value")

# 读取名为 "example_attr" 的属性的值
def get_example_attr():
    instance = get_instance()  # 获取实例
    return getattr(instance, "example_attr")  # 获取属性值