tf.shape() 和x.get_shape().as_list() 和tf.split()

1、tf.shape(A) # 获取张量A(数组,list, tensor张量)的大小,返回的是一个list。

import tensorflow as tf
import numpy as np

a_array=np.array([[1,2,3],[4,5,6]])
b_list=[[1,2,3],[3,4,5]]
c_tensor=tf.constant([[1,2,3],[4,5,6]])

with tf.Session() as sess:
    print(sess.run(tf.shape(a_array)))
    print(sess.run(tf.shape(b_list)))
    print(sess.run(tf.shape(c_tensor)))

返回[2, 3],[2, 3],[2, 3]。

2、x.get_shape().as_list()

x.get_shape(),只有tensor才可以使用这种方法,返回的是一个元组

import tensorflow as tf
import numpy as np

a_array=np.array([[1,2,3],[4,5,6]])
b_list=[[1,2,3],[3,4,5]]
c_tensor=tf.constant([[1,2,3],[4,5,6]])

print(c_tensor.get_shape())
print(c_tensor.get_shape().as_list())

with tf.Session() as sess:
    print(sess.run(tf.shape(a_array)))
    print(sess.run(tf.shape(b_list)))
    print(sess.run(tf.shape(c_tensor)))

返回:(2, 3),[2, 3],  [2, 3], [2, 3],  [2, 3]

只能用于tensor来返回shape,但是是一个元组,需要通过as_list()的操作转换成list.

3、tf.split()

tf.split(dimension, num_split, input):dimension的意思就是输入张量的哪一个维度,如果是0就表示对第0维度进行切割。num_split就是切割的数量,如果是2就表示输入张量被切成2份,每一份是一个列表。

import tensorflow as tf
import numpy as np

A = [[1,2,3],[4,5,6]]
x = tf.split(1, 3, A)

with tf.Session() as sess:
	c = sess.run(x)
	for ele in c:
		print ele

输出: 

[[1],
  [4]]
 [[2],
  [5]]
 [[3],
  [6]]

 

按照TensorFlow2.11的写法修改这段代码:“class tgcnCell(RNN): """Temporal Graph Convolutional Network """ def call(self, inputs, **kwargs): pass def __init__(self, num_units, adj, num_nodes, input_size=None, act=tf.nn.tanh, reuse=None): super(tgcnCell, self).__init__(units=num_units,_reuse=reuse) self._act = act self._nodes = num_nodes self._units = num_units self._adj = [] self._adj.append(calculate_laplacian(adj)) @property def state_size(self): return self._nodes * self._units @property def output_size(self): return self._units def __call__(self, inputs, state, scope=None): with tf.variable_scope(scope or "tgcn"): with tf.variable_scope("gates"): value = tf.nn.sigmoid( self._gc(inputs, state, 2 * self._units, bias=1.0, scope=scope)) r, u = tf.split(value=value, num_or_size_splits=2, axis=1) with tf.variable_scope("candidate"): r_state = r * state c = self._act(self._gc(inputs, r_state, self._units, scope=scope)) new_h = u * state + (1 - u) * c return new_h, new_h def _gc(self, inputs, state, output_size, bias=0.0, scope=None): inputs = tf.expand_dims(inputs, 2) state = tf.reshape(state, (-1, self._nodes, self._units)) x_s = tf.concat([inputs, state], axis=2) input_size = x_s.get_shape()[2].value x0 = tf.transpose(x_s, perm=[1, 2, 0]) x0 = tf.reshape(x0, shape=[self._nodes, -1]) scope = tf.get_variable_scope() with tf.variable_scope(scope): for m in self._adj: x1 = tf.sparse_tensor_dense_matmul(m, x0) x = tf.reshape(x1, shape=[self._nodes, input_size,-1]) x = tf.transpose(x,perm=[2,0,1]) x = tf.reshape(x, shape=[-1, input_size]) weights = tf.get_variable( 'weights', [input_size, output_size], initializer=tf.contrib.layers.xavier_initializer()) x = tf.matmul(x, weights) # (batch_size * self._nodes, output_size) biases = tf.get_variable( "biases", [output_size], initializer=tf.constant_initializer(bias, dtype=tf.float32)) x = tf.nn.bias_add(x, biases) x = tf.reshape(x, shape=[-1, self._nodes, output_size]) x = tf.reshape(x, shape=[-1, self._nodes * output_size]) return x”
最新发布
04-05
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