Calling a python script in Cakephp

I wrote a service class called search_categorization_service.php. Now I am making a call to python script in this class

class SearchCategorizationService  {      function searcher($query)      {        $tmp=passthru("python serverscript1.py $query");        ob_start();        $out=ob_get_contents();         echo print_r($out,true);      }  }

but i dont get any output on the browser. i tried returning it to a controller class and printing the output but it just wont work.any help wud be appreciated. is it an issue with cakephp? because the same application works fine in normal php.

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