无法使用tf.stack合并2D数组

时间:2019-06-20 07:48:03

标签: python numpy tensorflow

我是Tensoflow和python的初学者。现在,我有两个函数 get_lines() generate_rays()打算生成张量。我用numpy编写了这些函数,并且效果很好,但是当我将其转移到Tensorflow时,即将horizo​​n_lines更改为Tensor并将np.vstack()更改为tf.stack()会引发错误。

代码:

def get_lines(lines, angle):
    res = tf.round(lines / tf.tan(angle))

    return lines, res

def generate_rays(horizon_lines,
                        angles={0: np.array([1, 2, 3, 4])}):
    temp = [[get_lines(horizon_lines, a)] for a in angles[0]]
    rays_left = tf.stack(temp, axis = 0)

其中 horizo​​n_lines 是张量。

但是它显示:

  File "/home/zchen/PycharmProjects/test/tools/../lib/layer_utils/generate_rays.py", line 64, in generate_rays
    rays_left = tf.stack(pp, axis = 0)
  File "/home/zchen/.conda/envs/py3/lib/python3.7/site-packages/tensorflow/python/util/dispatch.py", line 180, in wrapper
    return target(*args, **kwargs)
  File "/home/zchen/.conda/envs/py3/lib/python3.7/site-packages/tensorflow/python/ops/array_ops.py", line 998, in stack
    value_shape = ops.convert_to_tensor(values[0], name=name)._shape_tuple()  # pylint: disable=protected-access
TypeError: 'generator' object is not subscriptable

有人知道如何解决吗?

0 个答案:

没有答案