调整一个张量 传入一个张量，这个操作返回一个张量，返回的张量和传入的张量有相同的值， 被调整为传入的 shape 形状。
Reshapes a tensor.
tensor, this operation returns a tensor that has the same values as
tensor with shape
If one component of
shape is the special value -1, the size of that dimension is computed so that the total size remains constant. In particular, a
[-1] flattens into 1-D. At most one component of
shape can be -1.
shape is 1-D or higher, then the operation returns a tensor with shape
shape filled with the values of
tensor. In this case, the number of elements implied by
shape must be the same as the number of elements in