sleep | 易学教程

How to make a Windows 10 computer go to sleep with a python script?

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问题 How can I make a computer sleep with a python script? It has to be sleep , not hibernate or anything else. I have tried to use cmd but there is no command to sleep or I didn't find one. 回答1: You can use import os os.system("rundll32.exe powrprof.dll,SetSuspendState 0,1,0") If this command doesn't work for you (it actually puts your comp. in hibernation mode) you will need to turn hibernation off: Powercfg -H OFF To turn hibernation mode back on: Powercfg -H ON Alternatively, you can also use:

Java 线程状态之 TIMED_WAITING

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在上一篇章中我们谈论了 WAITING 状态，在这一篇章里，我们来看剩余的最后的一个状态：TIMED_WAITING（限时等待）。定义一个正在限时等待另一个线程执行一个动作的线程处于这一状态。 A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state. 更详细的定义还是看 javadoc（jdk8）：带指定的等待时间的等待线程所处的状态。一个线程处于这一状态是因为用一个指定的正的等待时间（为参数）调用了以下方法中的其一： Thread.sleep 带时限（timeout）的 Object.wait 带时限（timeout）的 Thread.join LockSupport.parkNanos LockSupport.parkUntil 对应的英文原文如下： Thread state for a waiting thread with a specified waiting time. A thread is in the timed waiting state due to calling one of the following methods with a specified positive

What is a practical use for PHP's sleep()?

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I just had a look at the docs on sleep() . Where would you use this function? Is it there to give the CPU a break in an expensive function? Any common pitfalls? One place where it finds use is to create a delay . Lets say you've built a crawler that uses curl / file_get_contents to get remote pages. Now you don't want to bombard the remote server with too many requests in short time. So you introduce a delay between consecutive requests. sleep takes the argument in seconds, its friend usleep takes arguments in microseconds and is more suitable in some cases. Another example: You're running

What's the equivalent of Java's Thread.sleep() in Objective-C/Cocoa?

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In Java you can suspend the current thread's execution for an amount of time using Thread.sleep(). Is there something like this in Objective C? smorgan Yes, there's +[NSThread sleepForTimeInterval:] (Just so you know for future questions, Objective-C is the language itself; the library of objects (one of them at least) is Cocoa.) Sleeping for one second in Java: Thread.sleep(1000); Sleeping for one second in Objective C: [NSThread sleepForTimeInterval:1.0f]; Why are you sleeping? When you sleep, you are blocking the UI and also any background URL loading not in other threads (using the NSURL

How to use a timer to wait?

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问题 I am trying to delay events in my method by using a timer, however i do not necessarily understand how to use a timer to wait. I set up my timer to be 2 seconds, but when i run this code the last call runs without a 2 second delay. Timer timer = new Timer(); timer.Tick += new EventHandler(timer_Tick); // Everytime timer ticks, timer_Tick will be called timer.Interval = (1000) * (2); // Timer will tick evert second timer.Enabled = true; // Enable the timer void timer_Tick(object sender,

Sleep function uses server resources?

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问题 I've got two reasons to use a sleep function: first, to automatically send a confirmation email to a client 20 minutes after they contact us. I don't want to use cron jobs because I want it to be exactly 20 minutes (and I'm sick of my web server sending me emails telling me they initiated a cron job.....a new email every 20 minutes!) Second reason: I've heard of people sending out mass emails using the sleep function. Since my server will only allow 100 emails an hour, I want to use the sleep

How can I pause the execution of code in google script until the entire spreadsheet gets updated?

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I have a spreadsheet with lots of data and formulae. I am importing a particular cell value from spreadsheet into the google script. However since the cell is not updated with a recent revision, the script is taking the previous value. For now I have given "sleep" in script to temporarily stop the script from running so as to wait for the spreadsheet to get updated. I am not sure if the time that gave in sleep is sufficient in future with the data in spreadsheet increasing continuously. I would like to know if there is a way to check the status of spreadsheet (updated? updating? etc). I will

Trying to simulate constant byte rate. Confusion with time.sleep results

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Context I'm using windows 7 on my computer(the player) and linux(debian) on my college computer(the streamer), which I control using ssh. I was trying to simulate a constant byte rate of a microphone from reading a wave file, as if someone was talking. The problem was that the byte rate was below the target. Choosing a 32KB/s rate, and 0.020 seconds of capture time. I implemented the simulated microphone using time.sleep to produce give each chunk of data each 0.020 seconds. But the rate obtained was around 27KB/s, not 32KB/s The problem I decided to test how much precise time.sleep was on the

Sleep and check until condition is true

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问题 Is there a library in Java that does the following? A thread should repeatedly sleep for x milliseconds until a condition becomes true or the max time is reached. This situation mostly occurs when a test waits for some condition to become true. The condition is influenced by another thread . [EDIT]Just to make it clearer, I want the test to wait for only X ms before it fails. It cannot wait forever for a condition to become true. I am adding a contrived example. class StateHolder{ boolean

Is it always bad to use Thread.Sleep()?

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问题 I created an extension method for the the class Random which executes an Action (void delegate) at random times: public static class RandomExtension { private static bool _isAlive; private static Task _executer; public static void ExecuteRandomAsync(this Random random, int min, int max, int minDuration, Action action) { Task outerTask = Task.Factory.StartNew(() => { _isAlive = true; _executer = Task.Factory.StartNew(() => { ExecuteRandom(min, max, action); }); Thread.Sleep(minDuration);