Python-等待条件下CPU使用率不高 [英] Python - wait on a condition without high cpu usage

问题描述

在这种情况下，说我想等待某种情况发生，这种情况可能会在任意随机时间发生。

In this case, say I wanted to wait on a condition to happen, that may happen at any random time.

 while True:
    if condition:
        #Do Whatever
    else:
        pass

如您所见，通过只会发生，直到条件为True。但是，当条件不是True时，CPU被钉住会导致更高的CPU使用率的传递，而我只是希望它等待直到条件发生。我该怎么办？

As you can see, pass will just happen until the condition is True. But while the condition isn't True the cpu is being pegged with pass causing higher cpu usage, when I simply just want it to wait until the condition occurs. How may I do this?

推荐答案

如前所述，您可以a）轮询即检查条件，如果条件不正确等待一段时间，如果您的情况是外部事件，则可以安排阻塞状态以等待状态更改，或者还可以查看发布订阅模型 pubsub ，其中您的代码注册了对给定项目的兴趣，然后代码的其他部分发布了该项目。

As already mentioned you can a) poll i.e. check for a condition and if it is not true wait for some time interval, if your condition is an external event you can arrange for a blocking wait for the state to change, or you can also take a look at the publish subscribe model, pubsub, where your code registers an interest in a given item and then other parts of the code publish the item.

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