scipy_iter_solver.py 文件源码

def _declare_options(self):
        """
        Declare options before kwargs are processed in the init method.
        """
        self.options.declare('solver', default='gmres', values=tuple(_SOLVER_TYPES.keys()),
                             desc='function handle for actual solver')

        self.options.declare('restart', default=20, types=int,
                             desc='Number of iterations between restarts. Larger values increase '
                                  'iteration cost, but may be necessary for convergence. This '
                                  'option applies only to gmres.')

        # changing the default maxiter from the base class
        self.options['maxiter'] = 1000
        self.options['atol'] = 1.0e-12