def cond(ctx, A, norm=None):
        if norm is None:
            norm = lambda x: ctx.mnorm(x,1)
        return norm(A) * norm(ctx.inverse(A))
``next()`` support. Returns next filename.
dataset/ETHPy150Open fredrik-johansson/mpmath/mpmath/matrices/linalg.py/LinearAlgebraMethods.cond--crossover with--dataset/ETHPy150Open rasguanabana/ytfs/ytfs/actions.py/YTActions.__next__