def _onenormest_product(operator_seq, t=2, itmax=5, compute_v=False, compute_w=False, structure=None):
 return scipy.sparse.linalg.onenormest(ProductOperator(structure=structure, *operator_seq))

def _onenormest_product ( operator_seq , t = 2 , itmax = 5 , compute_v = False , compute_w = False , structure = None ) : return scipy . sparse . linalg . onenormest ( ProductOperator ( structure = structure , * operator_seq ) )
efficiently estimate the 1-norm of the matrix product of the args .