baptisten-hohenacker_manual/user/plugins/python-script/twig/PythonScriptTwigExtension.php

<?php
namespace Grav\Plugin;

use \Grav\Common\Grav;
use Grav\Common\Utils;

class PythonScriptTwigExtension extends \Twig_Extension
{

    /**
     * Returns extension name.
     *
     * @return string
     */
    public function getName()
    {
        return 'PythonScriptTwigExtension';
    }

    public function getFilters()
    {
	//associate filter name with php callable (here: class method)
        return [
            new \Twig_SimpleFilter('pythonscript', [$this, 'pythonscript_paramfirst'])

        ];
    }

    public function getFunctions()
    {
        return [
            new \Twig_SimpleFunction('pythonscript', [$this, 'pythonscript'])
        ];
    }
    public function pythonscript_paramfirst($param,$path)
    {
       //return $path . escapeshellarg($param);
       return $this->pythonscript($path,escapeshellarg($param));
    }
    public function pythonscript($path,$param)
    {
		
        $path_info = pathinfo($path);
        $config = Grav::instance()['config']->get('plugins.python-script');
		$command = "python " . $path;
		//$command = "test";
        if (in_array($path_info['extension'], $config['allowed_extensions'])) {
            if (Utils::startsWith($path, '/')) {
                if ($config['allow_in_grav'] && file_exists(GRAV_ROOT . $path)) {
                    $command = "python " .GRAV_ROOT. $path;
                } elseif ($config['allow_in_filesystem'] && file_exists($path)) {
                    $command = "python " . $path;
                }
            } else {
                $page_path = Grav::instance()['page']->path() . '/' . $path;
                //$param=Grav::instance()['page']->path() . '/' . $param;
                if ($config['allow_in_page'] && file_exists($page_path)) {
					$command = "python " . $page_path;
                }
            }
        }
        $command .= " ". $param;
		$output = shell_exec($command);
        //return $command ."<br>" . $output;
        return $output;
    }

}