code: def liste_parametres(self, parametre=None):
          
          condition = ""
          if parametre:
              condition = "WHERE CCHIM='%s'" % parametre
          _sql = """SELECT CCHIM AS PARAMETRE,
          NCON AS LIBELLE,
          NOPOL AS CODE
          FROM NOM_MESURE %s ORDER BY CCHIM""" % condition
          return psql.read_sql(_sql, self.conn)
docs: Liste des paramètres
  
          Paramètres:
          parametre: si fourni, retourne l'entrée pour ce parametre uniquement