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使用多个线程执行单个for循环(Using multiple threads to execute a single for loop)

 我可以使用多个线程在python中执行单个for循环吗？ 我的意思是，我的循环有大量的迭代，所以我想同时运行多个线程，每个线程可以执行一定数量的循环迭代。  
 假设迭代次数在很高的数量级。 例如10 ** 9。  
 而且，如果这是可能的，它是否会减少完成for循环执行所需的时间....？ 

Can I use multiple threads to execute a single for loop in python? I mean, my loop has huge number of iterations and so I would like to run multiple threads simultaneously in such a way that each thread can execute a certain number of iteration of the loop. 
Assume that the number of iterations is in high orders of magnitude. 10**9 for example. 
And also, if this is possible, does it reduce the time it requires to complete the execution of the for loop....?

原文：https://stackoverflow.com/questions/30964415

更新时间：2022-05-13 13:05

最满意答案

 
  问题是没有调用webService。  
 
 您没有提供任何相关证据，也无法从您发布的代码中分辨出来。  
 
  getOutputStream（）返回一个没有来自WebService的消息的OutputStream。  
 
 这毫无意义。 OutputStreams不包含来自对等体的消息。 它们用于向对等方发送消息。 这句话和你的头衔完全没有意义。  
 
  无论如何都要检查WebService是否已成功调用？  
 
 是。 阅读响应并返回，而不是硬连线"OK" 。  
 而你刚刚发布的代码就是这样做的。  
 
  同意它不是最漂亮的代码。  
 
 它甚至不是正确的代码。 HTTP标头无效，它不会尝试读取响应。 这只是无能。 使用您发布的HttpURLConnection代码。 

 
 The problem is that the webService is not called. 
 
You haven't provided any evidence to that effect, and it is impossible to tell from the code you've posted. 
 
 The getOutputStream() retuns an OutputStream that has no message from the WebService.  
 
This is meaningless. OutputStreams don't contain messages from the peer. They are used to send messages to the peer. This statement and your title are completely nonsensical. 
 
 Is there anyway to check that the WebService has been called successfully? 
 
Yes. Read the response, and return it, instead of hardwiring "OK". 
And you've just posted code that does exactly that. 
 
 Agreed it is not the most beautiful code. 
 
It isn't even correct code. The HTTP headers are invalid, and it makes no attempt to read a response. It's just incompetent. Use the HttpURLConnection code you posted.

使用多个线程执行单个for循环(Using multiple threads to execute a single for loop)

最满意答案

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