$models->execute_kw($db, $uid, $password,'sale.order', 'write',array(array(0), array('state'=>'sale')));

$url = <insert server URL>;
$db = <insert database name>;
$username = "admin";
$password = <insert password for your admin user (default: admin)>;


'sale.order'          -  module that to perform action (object of module )

'write'               - write method  (updation)

array(array(ids),     -  passing record id to update 

array('state'=>'sale' - updating state field to 'sale' 



$models->execute_kw($db, $uid, $password, 'res.partner', 'write',
    array(array($id), array('name'=>"Newer partner")));
// get record name after having changed it
$models->execute_kw($db, $uid, $password,
    'res.partner', 'name_get', array(array($id)));

Thank you ,