在特定时间后删除类的所有元素

import datetime

class Element:
    def __init__(self, data):
        self.data = data
        self.timestamp = datetime.datetime.now()

class ElementManager:
    def __init__(self):
        self.elements = []

    def add_element(self, element):
        self.elements.append(element)

    def is_expired(self, element):
        expiration_time = element.timestamp + datetime.timedelta(hours=1)  # 设置特定时间点为当前时间后1小时
        return datetime.datetime.now() > expiration_time

    def delete_expired_elements(self):
        self.elements = [element for element in self.elements if not self.is_expired(element)]

# 示例用法
manager = ElementManager()

element1 = Element("Element 1")
element2 = Element("Element 2")
manager.add_element(element1)
manager.add_element(element2)

# 在特定时间后删除过期的元素
manager.delete_expired_elements()

# 输出剩余元素
for element in manager.elements:
    print(element.data)