code: public function convert(Stmt\For_ $node)
      {
          if (is_array($node->cond) && count($node->cond) > 1) {
              throw new \Exception(sprintf('Cannot convert %s ', $this->dispatcher->pCommaSeparated($node->cond)));
          }
  
          if (count($node->cond) === 0) {
              return (!empty($node->init) ? $this->dispatcher->pStmts($node->init)."\n" : '')
                 .'loop'
                ." {\n".$this->dispatcher->pStmts($node->stmts)."\n".$this->dispatcher->pStmts($node->loop)."\n".'}';
          } elseif ($node->cond[0] instanceof BinaryOp) {
              $node = $this->findIteratorVar($node);
  
              return $this->printVars($node) . 'for '
                   .$this->dispatcher->p($node->init[0]->var).' in '.(!empty($node->cond) ? '' : '')
                   .'range('.$this->dispatcher->p($node->cond[0]->left).', '.$this->dispatcher->p($node->cond[0]->right).')'
                   .' {'.$this->dispatcher->pStmts($node->stmts)."\n".'}';
          } elseif (count($node->cond) === 1 && $node->cond[0] instanceof Node\Expr) {
              $ifNode = new Stmt\If_($node->cond[0], array('stmts' => array(new Node\Stmt\Break_())));
              return (!empty($node->init) ? $this->dispatcher->pStmts($node->init)."\n" : '')
              .'loop'
                      ." {\n".$this->dispatcher->p($ifNode)."\n".$this->dispatcher->pStmts($node->stmts)."\n".$this->dispatcher->pStmts($node->loop)."\n".'}';
          } else {
              throw new \Exception(sprintf('Cannot convert %s ', $this->dispatcher->pCommaSeparated($node->cond)));
          }
      }
docs: @param Stmt\For_ $node
  
  @return string