[BACK]Return to loncoursedata.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / interface

Diff for /loncom/interface/loncoursedata.pm between versions 1.144 and 1.152

version 1.144, 2005/03/03 18:57:36 version 1.152, 2006/02/04 20:03:30
Line 50  package Apache::loncoursedata; Line 50  package Apache::loncoursedata;
   
 use strict;  use strict;
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http);
 use Apache::lonnet();  use Apache::lonnet;
 use Apache::lonhtmlcommon;  use Apache::lonhtmlcommon;
 use Time::HiRes;  use Time::HiRes;
 use Apache::lonmysql;  use Apache::lonmysql;
Line 71  sub LoadDiscussion { Line 71  sub LoadDiscussion {
     my %Discuss=();      my %Discuss=();
     my %contrib=&Apache::lonnet::dump(      my %contrib=&Apache::lonnet::dump(
                 $courseID,                  $courseID,
                 $ENV{'course.'.$courseID.'.domain'},                  $env{'course.'.$courseID.'.domain'},
                 $ENV{'course.'.$courseID.'.num'});                  $env{'course.'.$courseID.'.num'});
       
     #my %contrib=&DownloadCourseInformation($name, $courseID, 0);      #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
   
Line 645  Returns: nothing Line 645  Returns: nothing
 ################################################  ################################################
 sub delete_caches {  sub delete_caches {
     my $courseid = shift;      my $courseid = shift;
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
     #      #
Line 861  sub get_student { Line 861  sub get_student {
 sub populate_student_table {  sub populate_student_table {
     my ($courseid) = @_;      my ($courseid) = @_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 869  sub populate_student_table { Line 869  sub populate_student_table {
     my $dbh = &Apache::lonmysql::get_dbh();      my $dbh = &Apache::lonmysql::get_dbh();
     my $request = 'INSERT IGNORE INTO '.$student_table.      my $request = 'INSERT IGNORE INTO '.$student_table.
         "(student,section,status) VALUES ";          "(student,section,status) VALUES ";
     my $classlist = &get_classlist($courseid);      my $cdom = $env{'course.'.$courseid.'.domain'};
       my $cnum = $env{'course.'.$courseid.'.num'};
       my $classlist = &get_classlist($cdom,$cnum);
     my $student_count=0;      my $student_count=0;
     while (my ($student,$data) = each %$classlist) {      while (my ($student,$data) = each %$classlist) {
         my ($section,$status) = ($data->[&CL_SECTION()],          my ($section,$status) = ($data->[&CL_SECTION()],
Line 1214  sub update_student_data { Line 1216  sub update_student_data {
     #      #
     # Set the students update time      # Set the students update time
     if ($Results[0] eq 'okay') {      if ($Results[0] eq 'okay') {
         &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);          &store_updatetime($student_id,$time_of_retrieval);
     }      }
     #      #
     return @Results;      return @Results;
Line 1270  sub store_student_data { Line 1272  sub store_student_data {
         # make sure the symb is set up properly          # make sure the symb is set up properly
         my $symb_id = &get_symb_id($current_symb);          my $symb_id = &get_symb_id($current_symb);
         #          #
         # Load data into the tables          # Parameters
         while (my ($parameter,$value) = each(%$param_hash)) {          while (my ($parameter,$value) = each(%$param_hash)) {
             my $newstring;  
             if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {              if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
                 $newstring = "('".join("','",                  my $sql_parameter = "('".join("','",
                                        $symb_id,$student_id,                                                $symb_id,$student_id,
                                        $parameter)."',".                                                $parameter)."',".
                                            $dbh->quote($value)."),\n";                                                    $dbh->quote($value)."),\n";
                 $num_parameters ++;                  $num_parameters ++;
                 if ($newstring !~ /''/) {                  if ($sql_parameter !~ /''/) {
                     $store_parameters_command .= $newstring;                      $store_parameters_command .= $sql_parameter;
                     $rows_stored++;                      #$rows_stored++;
                 }                  }
             }              }
             next if ($parameter !~ /^resource\.(.*)\.solved$/);          }
             #          # Performance
           my %stored;
           while (my ($parameter,$value) = each(%$param_hash)) {
               next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
             my $part = $1;              my $part = $1;
       next if ($part =~ /\./);
               next if (exists($stored{$part}));
               $stored{$part}++;
               #
             my $part_id = &get_part_id($part);              my $part_id = &get_part_id($part);
             next if (!defined($part_id));              next if (!defined($part_id));
             my $solved  = $value;              my $solved  = $value;
Line 1301  sub store_student_data { Line 1309  sub store_student_data {
             $awarded     = '' if (! defined($awarded));              $awarded     = '' if (! defined($awarded));
             $award       = '' if (! defined($award));              $award       = '' if (! defined($award));
             $awarddetail = '' if (! defined($awarddetail));              $awarddetail = '' if (! defined($awarddetail));
             $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,              my $sql_performance = 
                                    $solved,$tries,$awarded,$award,                  "('".join("','",$symb_id,$student_id,$part_id,$part,
                                    $awarddetail,$timestamp)."'),\n";                                  $solved,$tries,$awarded,$award,
             $store_performance_command .= $newstring;                                  $awarddetail,$timestamp)."'),\n";
               $store_performance_command .= $sql_performance;
             $rows_stored++;              $rows_stored++;
         }          }
     }      }
     chop $store_parameters_command;      if (! $rows_stored) { return ($returnstatus, undef); }
     chop $store_parameters_command;      $store_parameters_command =~ s|,\n$||;
     chop $store_performance_command;      $store_performance_command =~ s|,\n$||;
     chop $store_performance_command;  
     my $start = Time::HiRes::time;      my $start = Time::HiRes::time;
     $dbh->do($store_performance_command);      $dbh->do($store_performance_command);
     if ($dbh->err()) {      if ($dbh->err()) {
         &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());          &Apache::lonnet::logthis('performance bigass insert error:'.
         &Apache::lonnet::logthis('command = '.$store_performance_command);                                   $dbh->errstr());
           &Apache::lonnet::logthis('command = '.$/.$store_performance_command);
         $returnstatus = 'error: unable to insert performance into database';          $returnstatus = 'error: unable to insert performance into database';
         return ($returnstatus,$student_data);          return ($returnstatus,$student_data);
     }      }
     $dbh->do($store_parameters_command) if ($num_parameters>0);      $dbh->do($store_parameters_command) if ($num_parameters>0);
     if ($dbh->err()) {      if ($dbh->err()) {
         &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());          &Apache::lonnet::logthis('parameters bigass insert error:'.
         &Apache::lonnet::logthis('command = '.$store_parameters_command);                                   $dbh->errstr());
           &Apache::lonnet::logthis('command = '.$/.$store_parameters_command);
         &Apache::lonnet::logthis('rows_stored = '.$rows_stored);          &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
         &Apache::lonnet::logthis('student_id = '.$student_id);          &Apache::lonnet::logthis('student_id = '.$student_id);
         $returnstatus = 'error: unable to insert parameters into database';          $returnstatus = 'error: unable to insert parameters into database';
Line 1351  Returns nothing on success and 'error' o Line 1361  Returns nothing on success and 'error' o
 ######################################  ######################################
 sub ensure_tables_are_set_up {  sub ensure_tables_are_set_up {
     my ($courseid) = @_;      my ($courseid) = @_;
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #       # 
     # Clean out package variables      # Clean out package variables
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 1408  sub ensure_current_data { Line 1418  sub ensure_current_data {
     my ($sname,$sdom,$courseid) = @_;      my ($sname,$sdom,$courseid) = @_;
     my $status = 'okay';   # return value      my $status = 'okay';   # return value
     #      #
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     &ensure_tables_are_set_up($courseid);      &ensure_tables_are_set_up($courseid);
     #      #
     # Get the update time for the user      # Get the update time for the user
Line 1457  sub ensure_current_full_data { Line 1467  sub ensure_current_full_data {
     my ($sname,$sdom,$courseid) = @_;      my ($sname,$sdom,$courseid) = @_;
     my $status = 'okay';   # return value      my $status = 'okay';   # return value
     #      #
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     &ensure_tables_are_set_up($courseid);      &ensure_tables_are_set_up($courseid);
     #      #
     # Get the update time for the user      # Get the update time for the user
Line 1633  an empty list is returned. Line 1643  an empty list is returned.
 sub get_current_state {  sub get_current_state {
     my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;      my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
     #      #
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     return () if (! defined($sname) || ! defined($sdom));      return () if (! defined($sname) || ! defined($sdom));
     #      #
Line 1736  able to answer it correctly. Line 1746  able to answer it correctly.
 sub get_problem_statistics {  sub get_problem_statistics {
     my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;      my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
     return if (! defined($symb) || ! defined($part));      return if (! defined($symb) || ! defined($part));
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $symb_id = &get_symb_id($symb);      my $symb_id = &get_symb_id($symb);
Line 1863  sub execute_SQL_request { Line 1873  sub execute_SQL_request {
     my ($dbh,$request)=@_;      my ($dbh,$request)=@_;
 #    &Apache::lonnet::logthis($request);  #    &Apache::lonnet::logthis($request);
     my $sth = $dbh->prepare($request);      my $sth = $dbh->prepare($request);
       if (!$sth)
       { die $dbh->errstr . " SQL: $request"; }
     $sth->execute();      $sth->execute();
     my $row = $sth->fetchrow_arrayref();      my $row = $sth->fetchrow_arrayref();
     if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {      if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
Line 1885  sub execute_SQL_request { Line 1897  sub execute_SQL_request {
 sub populate_weight_table {  sub populate_weight_table {
     my ($courseid) = @_;      my ($courseid) = @_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 2035  sub rank_students_by_scores_on_resources Line 2047  sub rank_students_by_scores_on_resources
     my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;      my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
     return if (! defined($resources) || ! ref($resources) eq 'ARRAY');      return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 2095  Returns: the sum of the score on the pro Line 2107  Returns: the sum of the score on the pro
 sub get_sum_of_scores {  sub get_sum_of_scores {
     my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;      my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     if (defined($students) &&       if (defined($students) && 
         ((@$students == 0) ||          ((@$students == 0) ||
Line 2159  Returns: minimum, maximum, mean, s.d., n Line 2171  Returns: minimum, maximum, mean, s.d., n
 sub score_stats {  sub score_stats {
     my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;      my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 2202  sub score_stats { Line 2214  sub score_stats {
 #    &Apache::lonnet::logthis('request = '.$/.$request);  #    &Apache::lonnet::logthis('request = '.$/.$request);
           
     $request = 'SELECT SUM(weight) FROM '.$weight_table.      $request = 'SELECT SUM(weight) FROM '.$weight_table.
         ' WHERE ('.$symb_restriction.')';          ' AS a WHERE ('.$symb_restriction.')';
     my ($max_possible) = &execute_SQL_request($dbh,$request);      my ($max_possible) = &execute_SQL_request($dbh,$request);
     # &Apache::lonnet::logthis('request = '.$/.$request);      # &Apache::lonnet::logthis('request = '.$/.$request);
     return($min,$max,$ave,$std,$count,$max_possible);      return($min,$max,$ave,$std,$count,$max_possible);
Line 2233  Returns: minimum, maximum, mean, s.d., a Line 2245  Returns: minimum, maximum, mean, s.d., a
 sub count_stats {  sub count_stats {
     my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;      my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
Line 2251  sub count_stats { Line 2263  sub count_stats {
     $request =       $request = 
         'CREATE TEMPORARY TABLE '.$stats_table.' '.          'CREATE TEMPORARY TABLE '.$stats_table.' '.
         'SELECT a.student_id,'.          'SELECT a.student_id,'.
         'COUNT(a.award) AS count FROM '.          'SUM(a.awarded) AS count FROM '.
         $performance_table.' AS a '.          $performance_table.' AS a '.
         'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.          'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
         'WHERE ('.$symb_restriction.')'.          'WHERE ('.$symb_restriction.')';
         " AND a.award!='INCORRECT_ATTEMPTED'";  
     if ($time_limits) {      if ($time_limits) {
         $request .= ' AND '.$time_limits;          $request .= ' AND '.$time_limits;
     }      }
Line 2290  sub count_stats { Line 2301  sub count_stats {
 ######################################################  ######################################################
 sub get_student_data {  sub get_student_data {
     my ($students,$courseid) = @_;      my ($students,$courseid) = @_;
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $dbh = &Apache::lonmysql::get_dbh();      my $dbh = &Apache::lonmysql::get_dbh();
     return undef if (! defined($dbh));      return undef if (! defined($dbh));
Line 2331  sub get_response_data { Line 2342  sub get_response_data {
     my ($Sections,$enrollment,$symb,$response,$courseid) = @_;      my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
     return undef if (! defined($symb) ||       return undef if (! defined($symb) || 
                ! defined($response));                 ! defined($response));
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $symb_id = &get_symb_id($symb);      my $symb_id = &get_symb_id($symb);
Line 2404  sub get_response_data_by_student { Line 2415  sub get_response_data_by_student {
     my ($student,$symb,$response,$courseid) = @_;      my ($student,$symb,$response,$courseid) = @_;
     return undef if (! defined($symb) ||       return undef if (! defined($symb) || 
                      ! defined($response));                       ! defined($response));
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $symb_id = &get_symb_id($symb);      my $symb_id = &get_symb_id($symb);
Line 2460  sub get_response_time_data { Line 2471  sub get_response_time_data {
     my ($sections,$enrollment,$symb,$part,$courseid) = @_;      my ($sections,$enrollment,$symb,$part,$courseid) = @_;
     return undef if (! defined($symb) ||       return undef if (! defined($symb) || 
                      ! defined($part));                       ! defined($part));
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     #      #
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $symb_id = &get_symb_id($symb);      my $symb_id = &get_symb_id($symb);
Line 2526  sub get_response_time_data { Line 2537  sub get_response_time_data {
 ################################################  ################################################
 ################################################  ################################################
 sub get_student_scores {  sub get_student_scores {
     my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;      my ($sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));      $courseid = $env{'request.course.id'} if (! defined($courseid));
     &setup_table_names($courseid);      &setup_table_names($courseid);
     my $dbh = &Apache::lonmysql::get_dbh();      my $dbh = &Apache::lonmysql::get_dbh();
     return (undef) if (! defined($dbh));      return (undef) if (! defined($dbh));
     my $tmptable = $courseid.'_temp_'.time;      my $tmptable = $courseid.'_temp_'.time;
       my $request = 'DROP TABLE IF EXISTS '.$tmptable;
   #    &Apache::lonnet::logthis('request = '.$/.$request);
       $dbh->do($request);
     #      #
     my $symb_requirements;      my $symb_requirements;
     if (defined($Symbs)  && @$Symbs) {      if (defined($Symbs)  && @$Symbs) {
Line 2542  sub get_student_scores { Line 2556  sub get_student_scores {
                               } @$Symbs).')';                                } @$Symbs).')';
     }      }
     #      #
     my $student_requirements;      my ($student_requirements,$enrollment_requirements) = 
     if ( (defined($Sections) && $Sections->[0] ne 'all')) {          &limit_by_section_and_status($sections,$enrollment,'b');
         $student_requirements = '('.  
             join(' OR ', map { "b.section='".$_."'" } @$Sections  
                  ).')';  
     }  
     #  
     my $enrollment_requirements=undef;  
     if (defined($enrollment) && $enrollment ne 'Any') {  
         $enrollment_requirements = "b.status='".$enrollment."'";  
     }  
     #      #
     my $time_requirements = undef;      my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
     if (defined($starttime)) {  
         $time_requirements .= "a.timestamp>='".$starttime."'";  
         if (defined($endtime)) {  
             $time_requirements .= " AND a.timestamp<='".$endtime."'";  
         }  
     } elsif (defined($endtime)) {  
         $time_requirements .= "a.timestamp<='".$endtime."'";  
     }  
     ##  
     ##      ##
     my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.      $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
         ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.          ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
         $performance_table.' AS a ';          $performance_table.' AS a ';
       $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
     if (defined($student_requirements) || defined($enrollment_requirements)) {      if (defined($student_requirements) || defined($enrollment_requirements)) {
         $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';          $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id';
     }      }
     if (defined($symb_requirements)      ||       if (defined($symb_requirements)      || 
         defined($student_requirements)   ||          defined($student_requirements)   ||
Line 2631  Cleans up the package variables for loca Line 2628  Cleans up the package variables for loca
 sub setup_table_names {  sub setup_table_names {
     my ($courseid) = @_;      my ($courseid) = @_;
     if (! defined($courseid)) {      if (! defined($courseid)) {
         $courseid = $ENV{'request.course.id'};          $courseid = $env{'request.course.id'};
     }      }
     #      #
     if (! defined($current_course) || $current_course ne $courseid) {      if (! defined($current_course) || $current_course ne $courseid) {
Line 2704  Retrieve the classist of a given class o Line 2701  Retrieve the classist of a given class o
 information is returned from the classlist.db file and, if needed,  information is returned from the classlist.db file and, if needed,
 from the students environment.  from the students environment.
   
 Optional arguments are $cid, $cdom, and $cnum (course id, course domain,  Optional arguments are $cdom, and $cnum (course domain,
 and course number, respectively).  Any omitted arguments will be taken   and course number, respectively).  If either is ommitted the course
 from the current environment ($ENV{'request.course.id'},  will be taken from the current environment ($env{'request.course.id'},
 $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).  $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
   
 Returns a reference to a hash which contains:  Returns a reference to a hash which contains:
  keys    '$sname:$sdom'   keys    '$sname:$sdom'
Line 2734  sub CL_TYPE     { return 8; } Line 2731  sub CL_TYPE     { return 8; }
 sub CL_LOCKEDTYPE   { return 9; }  sub CL_LOCKEDTYPE   { return 9; }
   
 sub get_classlist {  sub get_classlist {
     my ($cid,$cdom,$cnum) = @_;      my ($cdom,$cnum) = @_;
     $cid = $cid || $ENV{'request.course.id'};      my $cid = $cdom.'_'.$cnum;
     $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};      if (!defined($cdom) || !defined($cnum)) {
     $cnum = $cnum || $ENV{'course.'.$cid.'.num'};   $cid =  $env{'request.course.id'};
    $cdom = $env{'course.'.$cid.'.domain'};
    $cnum = $env{'course.'.$cid.'.num'};
       }
     my $now = time;      my $now = time;
     #      #
     my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);      my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
Removed from v.1.144  
changed lines
  Added in v.1.152

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