[ww-devel] Making Perl modules available

Mon Jun 29 14:01:16 EDT 2015

The Data prefix didn't help.  Here's a minimal example.

PG file:

DOCUMENT();

loadMacros(
     "PGstandard.pl",
     "MathObjects.pl",
     "PGML.pl",
     "PGchoicemacros.pl",
     "PGauxiliaryFunctions.pl",
     "gameTheory.pl",
);

TEXT(beginproblem);

$matrix = [ [1,2], [3,4] ];

BEGIN_TEXT

     \{ Data::Dumper @$matrix \}

END_TEXT

ENDDOCUMENT();

The output:

*Warning* -- there may be something wrong with this question. Please 
inform your instructor including the warning messages below.
(0 pts) *Problems/GameTheory/datadumper.pg*
\{

*Data::Dumper ARRAY(0xdc49220)ARRAY(0xdc491f0) *

\}

Edit2 
<http://127.0.0.1/webwork2/NewGenEd/instructor/pgProblemEditor2/Undefined_Set/1/?user=admin&effectiveUser=admin&theme=&sourceFilePath=Problems/GameTheory/datadumper.pg&key=wkYIunlmy0WTpNBSIN3BL6mEWC3gyeTY> 
Edit3 
<http://127.0.0.1/webwork2/NewGenEd/instructor/pgProblemEditor3/Undefined_Set/1/?effectiveUser=admin&theme=&user=admin&key=wkYIunlmy0WTpNBSIN3BL6mEWC3gyeTY&sourceFilePath=Problems/GameTheory/datadumper.pg> 

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      Warning messages

  * |ERROR in old_safe_ev, PGbasicmacros.pl: <PRE>|
  * |## There is an error occuring inside evaluation brackets \{
    ...code... \}|
  * |## somewhere in an EV2 or EV3 or BEGIN_TEXT block.|
  * |## Code evaluated:|
  * |## Data::Dumper @$matrix |
  * |##syntax error at line 2 of (eval 1261), near "Data::Dumper @"|
  * |##</PRE><BR/>|
  * |at (eval 1181) line 1671|

      Request information

Time 	Mon Jun 29 13:54:07 2015
Method 	GET
URI 	/webwork2/NewGenEd/Undefined_Set/1/

In my defaults.config I have:

${pg}{modules} = [
         [qw(HTML::Parser)],
         [qw(HTML::Entities)],
     [qw(DynaLoader)],
     [qw(Exporter)],
     [qw(GD)],
     [qw(AlgParser AlgParserWithImplicitExpand Expr 
ExprWithImplicitExpand utf8)],
     [qw(AnswerHash AnswerEvaluator)],
     [qw(WWPlot)], # required by Circle (and others)
     [qw(Circle)],
     [qw(Complex)],
     [qw(Complex1)],
     [qw(Distributions)],
     [qw(Fraction)],
     [qw(Fun)],
     [qw(Hermite)],
     [qw(Label)],
     [qw(ChoiceList)],
     [qw(Match)],
     [qw(MatrixReal1)], # required by Matrix
     [qw(Matrix)],
     [qw(Multiple)],
     [qw(PGrandom)],
     [qw(Regression)],
     [qw(MatrixWithElemOps MatrixReal1 Matrix)],
     [qw(SysLinEq MatrixReal1 Matrix MatrixWithElemOps)],
     [qw(Select)],
     [qw(Units)],
     [qw(VectorField)],
     [qw(Parser Value)],
     [qw(Parser::Legacy)],
         [qw(Statistics)],
#    [qw(SaveFile)],
     [qw(Chromatic)], # for Northern Arizona graph problems
#                    #  -- follow instructions at 
libraries/nau_problib/lib/README to install
     [qw(Applet FlashApplet JavaApplet CanvasApplet GeogebraWebApplet)],
     [qw(PGcore PGalias PGresource PGloadfiles PGanswergroup 
PGresponsegroup  Tie::IxHash)],
     [qw(Locale::Maketext)],
     [qw(WeBWorK::Localize)],
     [qw(JSON)],
     [qw(Data::Dumper)]
];

On 06/29/2015 01:50 PM, Davide P. Cervone wrote:
> You will probably need to use the explicit namespace, since that is 
> what is imported into the safe compartment:
>
> Data::Dumper @$socwelbest
>
> Give that a try.  Of not, can you post the complete problem so that we 
> can reproduce your situation?  It is hard to tell without seeing what 
> you are actually doing.
>
> Davide
>
>
> On Jun 29, 2015, at 1:39 PM, Andrew Dabrowski wrote:
>
>> I should to my earlier message that I did restart httpd.  I'm running 
>> Arch Linux.
>>
>>
>> I thought it would be handy to make Perl's Data::Dumper available for 
>> debugging.  So on my office computer I added the line
>>
>> [qw(Data::Dumper)]
>>
>> to ${pg}{modules} in defaults.config. But it didn't work, I still get 
>> an error.
>>
>> This is the code in my pg file to display debugging info.
>>
>> BEGIN_TEXT
>>
>>     \{ Dumper @$socwelbest \}
>>
>> END_TEXT
>>
>> The display is this.
>>
>> <Mail Attachment.png>
>>
>> Here's the error message.
>>
>>
>>       Warning messages
>>
>>   * |ERROR in old_safe_ev, PGbasicmacros.pl: <PRE>|
>>   * |## There is an error occuring inside evaluation brackets \{
>>     ...code... \}|
>>   * |## somewhere in an EV2 or EV3 or BEGIN_TEXT block.|
>>   * |## Code evaluated:|
>>   * |## Dumper @$socwelbest |
>>   * |##syntax error at line 2 of (eval 1132), near "Dumper @"|
>>   * |##</PRE><BR/>|
>>   * |at (eval 1051) line 1671|
>>
>>
>>
>> It actually works fine when I use my own dumper function, defined in 
>> a pl file (apart from the fact that my dumper isn't as nice as Perl's).
>>
>> What's the correct way to do this, i.e. add a aPerl module to webwork?
>>
>>
>> -- 
>> Andrew Dabrowski   || ...my suspicion is that the universe is
>> Indiana University || not only queerer than we suppose, but
>> Swain East 117     || queerer than we can suppose. -JBS Haldane
>>
>> _______________________________________________
>> webwork-devel mailing list
>> webwork-devel at webwork.maa.org <mailto:webwork-devel at webwork.maa.org>
>> http://webwork.maa.org/mailman/listinfo/webwork-devel
>
>
>
> _______________________________________________
> webwork-devel mailing list
> webwork-devel at webwork.maa.org
> http://webwork.maa.org/mailman/listinfo/webwork-devel

-- 
Andrew Dabrowski   || ...my suspicion is that the universe is
Indiana University || not only queerer than we suppose, but
Swain East 117     || queerer than we can suppose. -JBS Haldane

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