[Accuracy diff No.28-29] Fix accuracy diff for paddle.linalg.norm API #197
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在 Paddle 中,如果 axis 为 None,x 会被压缩成一维向量然后计算向量范数。在 pytorch 中 axis为 None,输入可以允许为 1D(向量范数) 或 2D(矩阵范数)。我们只需要将 x flatten 1D 之后传入对应的 torch 函数,if keepdim, reshape 会原来的形状