Question

我刚写了一个看起来像这样的函数：

def block_for(seconds):
    """Wait at least seconds, this function should not be affected by the computer sleeping."""
    end_time = datetime.datetime.now() + datetime.timedelta(seconds)

    while datetime.datetime.now() < end_time:
        pass

这有什么不好的吗？理想情况下，while循环中应该有什么东西吗？

Answer 1

time.sleep(seconds)秒就可以在没有烧掉CPU周期的情况下做到这一点。你的循环让CPU完全忙碌。我不知道你，但我认为这坏。

Answer 2

在while循环中放置time.sleep（1）可能需要更少的周期？或

def block_for(seconds):
    """Wait at least seconds, this function should not be affected by the computer sleeping."""
    end_time = datetime.datetime.now() + datetime.timedelta(seconds=seconds)

    while datetime.datetime.now() < end_time - datetime.timedelta(seconds=1):
        time.sleep(1)

    while datetime.datetime.now() < end_time:
        pass

等待使用while的功能

2 个答案: