public function updatePersonnage(Personnage $perso)
 {
     // prepare UPDATE request
     // assign value to request
     // execute request
     $req = $this->bdd->prepare('UPDATE Personnages_v2
                                     SET degats          = :degats,
                                         timeToBeAsleep  = :timeToBeAsleep,
                                         atout           = :atout
                                   WHERE id = :id
                                 ');
     $req->bindValue(':degats', $perso->getDegats(), PDO::PARAM_INT);
     $req->bindValue(':timeToBeAsleep', $perso->getTimeToBeAsleep(), PDO::PARAM_INT);
     $req->bindValue(':atout', $perso->getAtout(), PDO::PARAM_INT);
     $req->bindValue(':id', $perso->getId(), PDO::PARAM_INT);
     $req->execute();
     $req->closeCursor();
     // close request
 }