In Python, that would be `ValueError`, or a subclass of it.

For example, trying to `.read()` a closed file raises &quot;ValueError: I/O operation on closed file&quot;.

`ValueError` seems more like the equivalent to Java&#39;s `IllegalArgumentException`. 

[RuntimeError][1] sounds like a better fit to me:

&gt; Raised when an error is detected that doesn’t fall in any of the other categories. The associated value is a string indicating what precisely went wrong.

Most of the time you don&#39;t want to do any special error handling on such an error anyway, so the generic `RuntimeError` should suffice out of the box.

In case you do want to handle it differently to other errors just derive your own exception from it:
```python
class IllegalStateError(RuntimeError):
    pass
```
  [1]: https://docs.python.org/3/library/exceptions.html#RuntimeError

[ValueError][1] sounds appropriate to me: 

&gt;Raised when a built-in operation or function receives an argument that has the right type but an inappropriate value, and the situation is not described by a more precise exception such as [IndexError][2].


  [1]: http://docs.python.org/library/exceptions.html?highlight=valueerror#exceptions.ValueError
  [2]: http://docs.python.org/library/exceptions.html?highlight=valueerror#exceptions.IndexError

How can one get the full HTTP REST request body for a `POST` request using Jersey?

In our case the data will be XML.  Size would vary from 1K to 1MB.

The [docs][1] seem to indicate you should use `MessageBodyReader` but I can&#39;t see any examples.


  [1]: http://dlc.sun.com/pdf/820-4867/820-4867.pdf

How to get full REST request body using Jersey?

This likely applies to non MVC too.  But, Is it possible to use the &#39;using&#39; statement in my aspx views?

Reason is that I have the pages reference resource files for localised strings.  And some of these resource references are quite long - it&#39;s really cluttering my code.

Since most of the time these resources are in a namespace specifially for the view, I&#39;d just like to put a &#39;using Resources.This.that&#39; at the top of the page.  I don&#39;t seem to be able to though - is there a way?

Thanks

Is it possible to use the &#39;using&#39; statement in my aspx views? (ASP.NET MVC)

IllegalStateException is often used in Java when a method is invoked on an object in inappropriate state. What would you use instead in Python?

Is there an analogue to Java IllegalStateException in Python?

<p>IllegalStateException is often used in Java when a method is invoked on an object in inappropriate state. What would you use instead in Python?</p>


I&#39;m trying to convert the `String`  `\something\` into the `String` `\\something\\` using `replaceAll`, but I keep getting all kinds of errors. I thought this was the solution:

    theString.replaceAll(&quot;\\&quot;, &quot;\\\\&quot;);

But this gives the below exception: 

    java.util.regex.PatternSyntaxException: Unexpected internal error near index 1


String.replaceAll single backslashes with double backslashes

Does the `ExecutorService` guarantee thread safety ? 

I&#39;ll be submitting jobs from different threads to the same ThreadPoolExecutor, do I have to synchronize access to the executor before interacting/submitting tasks?


Is ExecutorService (specifically ThreadPoolExecutor) thread safe?

I am getting Java exception like: 

    java.net.MalformedURLException: no protocol

My program is trying to parse an XML string by using:

    Document dom;
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    dom = db.parse(xml);

The XML string contains:

    String xml = &quot;&lt;?xml version=\&quot;1.0\&quot; encoding=\&quot;utf-8\&quot;?&gt;&quot;+
		&quot;	&lt;s:Envelope xmlns:s=\&quot;http://schemas.xmlsoap.org/soap/envelope/\&quot;&gt;&quot;+
		&quot;		&lt;s:Header&gt;&quot;+
		&quot;			&lt;ActivityId CorrelationId=\&quot;15424263-3c01-4709-bec3-740d1ab15a38\&quot; xmlns=\&quot;http://schemas.microsoft.com/2004/09/ServiceModel/Diagnostics\&quot;&gt;50d69ff9-8cf3-4c20-afe5-63a9047348ad&lt;/ActivityId&gt;&quot;+
		&quot;			&lt;clalLog_CorrelationId xmlns=\&quot;http://clalbit.co.il/clallog\&quot;&gt;eb791540-ad6d-48a3-914d-d74f57d88179&lt;/clalLog_CorrelationId&gt;&quot;+
		&quot;		&lt;/s:Header&gt;&quot;+
		&quot;		&lt;s:Body&gt;&quot;+
		&quot;			&lt;ValidatePwdAndIPResponse xmlns=\&quot;http://tempuri.org/\&quot;&gt;&quot;+
		&quot;			&lt;ValidatePwdAndIPResult xmlns:a=\&quot;http://schemas.datacontract.org/2004/07/ClalBit.ClalnetMediator.Contracts\&quot; xmlns:i=\&quot;http://www.w3.org/2001/XMLSchema-instance\&quot;&gt;&quot;+
		&quot;			&lt;a:ErrorMessage&gt;Valid User&lt;/a:ErrorMessage&gt;&quot;+
		&quot;			&lt;a:FullErrorMessage i:nil=\&quot;true\&quot; /&gt;&quot;+
		&quot;			&lt;a:IsSuccess&gt;true&lt;/a:IsSuccess&gt;&quot;+
		&quot;			&lt;a:SecurityToken&gt;999993_310661843&lt;/a:SecurityToken&gt;&quot;+
		&quot;			&lt;/ValidatePwdAndIPResult&gt;&quot;+
		&quot;			&lt;/ValidatePwdAndIPResponse&gt;&quot;+
		&quot;		&lt;/s:Body&gt;\n&quot;+
		&quot;	&lt;/s:Envelope&gt;\n&quot;;

Any suggestions about what is causing this error? 


java.net.MalformedURLException: no protocol

I&#39;m trying to add an actual percent sign into a printf statement in Java and I&#39;m getting the error:

    lab1.java:166: illegal escape character
                    System.out.printf(&quot;%s\t%s\t%1.2f\%\t%1.2f\%\n&quot;,ID,pattern,support,confidence);
                                                     ^
    lab1.java:166: illegal escape character
                    System.out.printf(&quot;%s\t%s\t%1.2f\%\t%1.2f\%\n&quot;,ID,pattern,support,confidence);
                                                              ^
    2 errors

I can&#39;t figure out how to put an actual percent sign into my printf? I thought using \% to escape it would work, but it isn&#39;t.

Any ideas?

Java: Literal percent sign in printf statement

Is it possible in Hibernate to print generated SQL queries with real values instead of question marks?

How would you suggest to print queries with real values if it is not possible with Hibernate API?








                 


How to print a query string with parameter values when using Hibernate

The `list.index(x)` function returns the index in the list of the first item whose value is `x`.

Is there a function, `list_func_index()`, similar to the `index()` function that has a function, `f()`, as a parameter. The function, `f()` is run on every element, `e`, of the list until  `f(e)` returns `True`. Then `list_func_index()` returns the index of `e`.

Codewise:

    &gt;&gt;&gt; def list_func_index(lst, func):
          for i in range(len(lst)):
            if func(lst[i]):
              return i
          raise ValueError(&#39;no element making func True&#39;)
    
    &gt;&gt;&gt; l = [8,10,4,5,7]
    &gt;&gt;&gt; def is_odd(x): return x % 2 != 0
    &gt;&gt;&gt; list_func_index(l,is_odd)
    3
      

Is there a more elegant solution? (and a better name for the function)


Python: return the index of the first element of a list which makes a passed function true

I prefer using Notepad++ for developing,

How do I execute the files in Python through Notepad++?



How to Execute a Python Script in Notepad++?

I&#39;m looking for a simple process-based parallel map for python, that is, a function

    parmap(function,[data])

that would run function on each element of [data] on a different process (well, on a different core, but AFAIK, the only way to run stuff on different cores in python is to start multiple interpreters), and return a list of results.

Does something like this exist? I would like something **simple**, so a simple module would be nice. Of course, if no such thing exists, I will settle for a big library :-/

Is there a simple process-based parallel map for python?

I have the following code:

    r = numpy.zeros(shape = (width, height, 9))

It creates a `width x height x 9` matrix filled with zeros. Instead, I&#39;d like to know if there&#39;s a function or way to initialize them instead to `NaN`s in an easy way.

Create numpy matrix filled with NaNs

Is there a straightforward way to find all the modules that are part of a python package? I&#39;ve found [this old discussion][1], which is not really conclusive, but I&#39;d love to have a definite answer before I roll out my own solution based on os.listdir().


  [1]: http://bytes.com/topic/python/answers/36924-how-get-list-modules-package

List all the modules that are part of a python package?

Google&#39;s Go language has no exceptions as a design choice, and Linus of Linux fame has called exceptions crap. Why?


Why is exception handling bad?

I often see/hear people say that exceptions should only be used rarely, but never explain why. While that may be true, rationale is normally a glib: *&quot;it&#39;s called an exception for a reason&quot;* which, to me, seems to be the sort of explanation that should never be accepted by a respectable programmer/engineer. 

There is a range of problems that an exception can be used to solve. **Why is it unwise to use them for control flow? What is the philosophy behind being &lt;pun&gt;exceptionally&lt;/pun&gt; conservative with how they are used? Semantics? Performance? Complexity? Aesthetics? Convention?**

I&#39;ve seen some analysis on performance before, but at a level that would be relevant to some systems and irrelevant to others.

Again, I don&#39;t necessarily disagree that they should be saved for special circumstances, but I&#39;m wondering what the consensus rationale is (if such a thing exists).


Why should exceptions be used conservatively?

I&#39;m getting an intermittent exception saying that asp.net mvc can’t find the action method. Here’s the exception:

&gt; A public action method &#39;Fill&#39; could
&gt; not be found on controller
&gt; &#39;Schoon.Form.Web.Controllers.ChrisController&#39;.

I think I have the routing set up correctly because this application works most of the time. Here is the controller’s action method.

    [ActionName(&quot;Fill&quot;)]
    [AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post), UserIdFilter, DTOFilter]
    public ActionResult Fill(int userId, int subscriberId, DisplayMode? mode)
    {
         //…
    }

The route:

    routes.MapRoute(
            &quot;SchoonForm&quot;,
            &quot;Form/Fill/{subscriberId}&quot;,
            new { controller = &quot;ChrisController&quot;, action = &quot;Fill&quot; },
            new { subscriberId = @&quot;\d+&quot; }
        );

And here is the stack:

&gt; System.Web.HttpException: A public
&gt; action method &#39;Fill&#39; could not be
&gt; found on controller
&gt; &#39;Schoon.Form.Web.Controllers.ChrisController&#39;.
&gt; at
&gt; System.Web.Mvc.Controller.HandleUnknownAction(String
&gt; actionName) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\Controller.cs:line
&gt; 197  at
&gt; System.Web.Mvc.Controller.ExecuteCore()
&gt; in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\Controller.cs:line
&gt; 164  at
&gt; System.Web.Mvc.ControllerBase.Execute(RequestContext
&gt; requestContext) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\ControllerBase.cs:line
&gt; 76  at
&gt; System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext
&gt; requestContext) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\ControllerBase.cs:line
&gt; 87  at
&gt; System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase
&gt; httpContext) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line
&gt; 80  at
&gt; System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext
&gt; httpContext) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line
&gt; 68  at
&gt; System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext
&gt; httpContext) in
&gt; C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line
&gt; 104  at
&gt; System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
&gt; at
&gt; System.Web.HttpApplication.ExecuteStep(IExecutionStep
&gt; step, Boolean&amp; completedSynchronously)

Here is an example of my filters they all work the same way:

    public class UserIdFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            const string Key = &quot;userId&quot;;
    
            if (filterContext.ActionParameters.ContainsKey(Key))
            {
                filterContext.ActionParameters[Key] = // get the user id from session or cookie
            }
    
            base.OnActionExecuting(filterContext);
        }
    }

Thanks,
Chris

Intermittent asp.net mvc exception: “A public action method ABC could not be found on controller XYZ.”

How do we create custom exceptions in Java?

Content Type	Original Author	Original Content on Stackoverflow
Question	Tuure Laurinolli	View Question on Stackoverflow
Solution 1 - Java	ddaa	View Answer on Stackoverflow
Solution 2 - Java	roskakori	View Answer on Stackoverflow
Solution 3 - Java	matt b	View Answer on Stackoverflow

Is there an analogue to Java IllegalStateException in Python?

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Is it possible to use the 'using' statement in my aspx views? (ASP.NET MVC)

How to get full REST request body using Jersey?

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