解决了

如何while循环在冷静实际工作?

1个月前
2021年12月15日
4回复
62的浏览量

米

Userlevel 1

＋1

马丁Edelius
领导流行的人
41个回复

这就跟你问声好！

我需要帮助我的头脑如何在冷静的while循环工作。的文档很不幸，一点用都没有。: /

我不明白的第一件事就是而循环有固定的迭代次数。这对我来说是为循环。一个而循环在条件不满足时运行。

第二件让人困惑的事情是，我可以将退出条件设置为成功、失败或不在乎。我想《不在乎》会让而循环到实际的为循环?

成功或失败的条件是我能够完全判断出来的，因为这是基于循环中任务的执行结果，而不是我所控制的参数。如果我选择“成功”作为退出条件，我是否必须故意让任务失败才能继续循环?

如果循环中有多个任务，退出条件触发时，所有任务都需要失败或成功吗?

是否有可能在我的脚本中设置一个参数，然后使用它作为退出条件?

谢谢。

图标

最佳答案Srinathgs.2021年12月16日，04:41

Hi Martin,<\/p>

\u00a0<\/p>

In most programming languages, While & For loop are usually convertible. If a variable initialisation, break condition and variable update mechanisms are given together, it constitutes a For loop and if just the break condition is present in the loop, it is a While loop.\u00a0<\/p>

\u00a0<\/p>

But, our implementation is inspired from a pythonic way of defining this, where For loop iterates over an iterable, such as a list, set, or a dictionary, whereas a While loop contains a condition.\u00a0<\/p>

\u00a0<\/p>

You can consider our While loop to be of the following implementation.<\/p>

\u00a0<\/p>

iteration = 0<\/code><\/p>

max_iteration = n<\/code><\/p>

can_continue = true<\/span><\/span><\/p>

while (iteration < max_iteration) or can_continue:<\/code><\/p>

\u00a0 \u00a0 can_continue = loop_body()<\/code><\/p>

\u00a0 \u00a0 iteration += 1<\/code><\/p>

\u00a0<\/p>

here, the can_continue<\/code> can be manipulated by the task that the loop is executing and currently, can_continue can be manipulated by the status of the loop_body as you\u2019ve found out.\u00a0\u00a0<\/p>

\u00a0<\/p>

Following is an example escript where I achieved the same.\u00a0<\/p>

\u00a0<\/p>

example escript<\/figcaption><\/figure>
$\"//www.jhbzcj.com/next/calm-application-management-55/\"$
While loop configuration<\/figcaption><\/figure>
This while loop exited on the 7th iteration when the task succeeded.\u00a0<\/p>
\u00a0<\/p>
$\"//www.jhbzcj.com/next/calm-application-management-55/\"$
Number of iterations for example while loop.<\/figcaption><\/figure>
\u00a0<\/p>
Please let me know if you need more details.\u00a0<\/p>","className":"post__content__best_answer"}">


            查看原始


          
           
            平静
           
           
           Hi!<\/p>I need help wrapping my head around how the while loop in Calm works. The documentation<\/a> is unfortunately not helpful at all. :\/<\/p>
The first thing I can\u2019t understand is why a while <\/em>loop has a fixed number of iterations. This to me is a for <\/em>loop. A while <\/em>loop runs while a condition isn\u2019t met.<\/p>
The second thing that\u2019s confusing is the exit condition that I can set to Success, Failure, or Don\u2019t Care. I guess that Don\u2019t Care turns the while <\/em>loop into an actual for <\/em>loop?<\/p>
The Success or Failure condition is as far as I can tell completely out of my hands as this is based on the result of the execution of the task(s) within the loop and not a parameter I control. Do I have to fail a task on purpose to keep the loop going if I choose Success as my exit condition?<\/p>
What happens if I have multiple tasks in the loop, do all tasks need to fail or succeed for the exit condition to trigger?<\/p>
Is it possible at all to set a parameter in one of my scripts and then use that as an exit condition?<\/p>
Thanks.<\/p>","quoteUsername":"Martin Edelius","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
            

             就像
             引用
             
             
              
               
                分享


        
         
          4回复
          
           
            
             古老的第一
            
             最新的第一
             最好的投票
            
           
          
         
         
          
           
            
             
              
               年代
             
             
           
          
          
           
            
             
              Srinathgs.
             
            “航行者”号
            1回复
            
              
               1个月前
               
                2021年12月16日
              
            回答
           
          
          
           嗨,马丁,
           
           在大多数编程语言中，While & For循环通常是可转换的。如果同时给出变量初始化、中断条件和变量更新机制，则构成For循环，如果循环中只有中断条件，则为While循环。
           
           但是，我们的实现是从定义此定义的Pythonic方法的启发，其中循环通过迭代迭代，例如列表，集或字典，而一段时间循环包含一个条件。
           
           您可以将While循环考虑为以下实现。
           
           迭代= 0
           max_iteration = n
           can_continue = true
           而(iteration < max_iteration)或can_continue:
           can_continue = loop_body ()
           迭代+ = 1
           
           在这里,can_continue可以被循环正在执行的任务操作，当前，can_continue可以被loop_body的状态操作，正如你发现的那样。
           
           下面是一个示例脚本，我实现了相同的。
           
           
            
            
             例子escript
           
           
            
            
             While循环配置
           
           当任务成功时，这个while循环在第7次迭代时退出。
           
           
            
            
             例如，循环的迭代次数。
           
           
           如果你需要更多的细节，请让我知道。
          
          
           
           Hi Martin,<\/p>\u00a0<\/p>
In most programming languages, While & For loop are usually convertible. If a variable initialisation, break condition and variable update mechanisms are given together, it constitutes a For loop and if just the break condition is present in the loop, it is a While loop.\u00a0<\/p>
\u00a0<\/p>
But, our implementation is inspired from a pythonic way of defining this, where For loop iterates over an iterable, such as a list, set, or a dictionary, whereas a While loop contains a condition.\u00a0<\/p>
\u00a0<\/p>
You can consider our While loop to be of the following implementation.<\/p>
\u00a0<\/p>
iteration = 0<\/code><\/p>
max_iteration = n<\/code><\/p>
can_continue = true<\/span><\/span><\/p>
while (iteration < max_iteration) or can_continue:<\/code><\/p>
\u00a0 \u00a0 can_continue = loop_body()<\/code><\/p>
\u00a0 \u00a0 iteration += 1<\/code><\/p>
\u00a0<\/p>
here, the can_continue<\/code> can be manipulated by the task that the loop is executing and currently, can_continue can be manipulated by the status of the loop_body as you\u2019ve found out.\u00a0\u00a0<\/p>
\u00a0<\/p>
Following is an example escript where I achieved the same.\u00a0<\/p>
\u00a0<\/p>
example escript<\/figcaption><\/figure>While loop configuration<\/figcaption><\/figure>This while loop exited on the 7th iteration when the task succeeded.\u00a0<\/p>
\u00a0<\/p>
Number of iterations for example while loop.<\/figcaption><\/figure>\u00a0<\/p>
Please let me know if you need more details.\u00a0<\/p>","quoteUsername":"SrinathGS","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
            

             就像
             引用
            
           

           
          

         

         
          
           
            
             
              
               米
             
             
           
           
            
             Userlevel 1
           
           
            
            ＋1
           
          
          
           
            
             
              马丁Edelius
             
            作者
            领导流行的人
            41个回复
            
              
               1个月前
               
                2021年12月16日
              
           
          
          
           嗨Srinath。
           谢谢你的解释。
           我不熟悉Python，所以我不能说这在Python中是否是一个“有效的”while循环，但作为一个从小编写C和c++的人，我想说，使用for循环作为一个while循环并不是最佳实践。：）
           您的实现似乎仍然是一种不必要的复杂方式，因为它迫使我指定最大迭代次数，当我可能不知道我需要多少迭代时。
           依赖脚本的退出状态(我仍然不知道是哪个或所有的脚本触发了退出条件)是非常粗糙的，因为我可能会将我的退出代码用于其他目的。
           为什么不使用一个适当的while循环来监视我在循环中的任何脚本中设置的参数?Calm读取脚本的“Set变量”类型的输出，那么为什么不使用它作为条件呢?
           目前，我们将直接在脚本中编码循环，这是一个遗憾，因为我们非常希望使用Calm的UI来说明运行簿的逻辑，而不需要打开脚本。
          
          
           
           Hi Srinath.<\/p>Thanks for the explanation.<\/p>
I\u2019m not familiar with Python so I can\u2019t say if this is a \u201cvalid\u201d while loop in Python, but as someone who grew up coding C and C++ I\u2019d say that using a for loop as a while loop isn\u2019t exactly considered best practices. :)<\/p>
Your implementation still seems like an unnecessarily complicated way of doing a loop as it forces me to specify a maximum number of iterations when I might not know how many iterations that I require.<\/p>
Relying on the exit status of the script - and I still don\u2019t know which or all of the scripts that triggers an exit condition - is extremely crude as I might use my exit codes for other purposes.<\/p>
Why not have a proper while loop that monitors a parameter I set in anyone of the scripts in the loop? Calm reads the output of the \u201cSet variable\u201d types of scripts as is so why not use that as the condition?<\/p>
For the time being we\u2019ll be coding loops directly in the scripts, which is a shame as we\u2019d\u00a0very much like to use the UI of Calm to illustrate the logic of a runbook, without having to open up a script.<\/p>","quoteUsername":"Martin Edelius","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
            

             就像
             引用
            
           
           
          
         
         
          
           
            
             
              
             
             
              
             
           
           
            
             Userlevel 4
           
           
            
            ＋5
           
          
          
           
            
             
              JoseNutanix
              
             
            Nutanix员工
            77回复
            
              
               1个月前
               
                2021年12月16日
              
           
          
          
           嗨,马丁,
           我建议使用Nutanix支持门户网站，你提高一个RFE来帮助改善这一壮举，使它更用户友好。
           感谢您的反馈。
          
          
           
            Jose Gomez |技术营销工程师| jose.gomez@nutanix.com | @pipoe2h
           
           Hi Martin,<\/p>I\u2019d suggest using the Nutanix Support portal you raise a RFE to help improving this FEAT to make it more user friendly.<\/p>
Thank you for the feedback.\u00a0<\/p>","quoteUsername":"JoseNutanix","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
            

             就像
             引用
            
           
           
          
         
         
          
           
            
             
              
               米
             
             
           
           
            
             Userlevel 1
           
           
            
            ＋1
           
          
          
           
            
             
              马丁Edelius
             
            作者
            领导流行的人
            41个回复
            
              
               1个月前
               
                2021年12月20日
              
           
          
          
           谢谢约瑟，我会的!
          
          
           
           Thanks Jose, will do!<\/p>","quoteUsername":"Martin Edelius","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
            
             就像
             引用
            
           
           
          
         
        

        
         
          回复

由内报名已经有账户了?登录用你的帐户登入登录社区用你的帐户登入输入您的用户名或电子邮件地址。我们会给你发一封电子邮件，告诉你如何重置密码。用户名或电子邮件回到概述扫描文件病毒。抱歉，我们仍在检查这个文件的内容，以确保下载是安全的。请几分钟后再试。好吧无法下载此文件对不起，我们的病毒扫描程序检测到这个文件下载不安全。好吧