多个列表解释返回具有上下文管理器的空列表

class EmptyListContextManager:
    def __enter__(self):
        return []

    def __exit__(self, exc_type, exc_value, traceback):
        print("Exiting context manager")

# 使用上下文管理器
with EmptyListContextManager() as lst:
    print("Inside context manager:", lst)
    # 在这里可以对lst进行操作

# 输出: Exiting context manager

class EmptyListContextManager:
    def __enter__(self):
        return []

    def __exit__(self, exc_type, exc_value, traceback):
        if exc_type is not None:
            print(f"Exception occurred: {exc_type}, {exc_value}")
        print("Exiting context manager")
        return True  # 返回True表示异常已被处理

# 使用上下文管理器
with EmptyListContextManager() as lst:
    print("Inside context manager:", lst)
    raise ValueError("Test exception")

# 输出:
# Inside context manager: []
# Exception occurred: <class 'ValueError'>, Test exception
# Exiting context manager