TensorFlow遇到的问题汇总（持续更新中......）

1、调用tf.softmax_cross_entropy_with_logits函数出错。

#原因是这个函数，不能按以前的方式进行调用了，只能使用命名参数的方式来调用。
#原来是这样的：
tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(y, y_))
#修改成这样的：
tf.reduce_sum(tf.nn.softmax_cross_entropy_with_logits(logits=y, labels=y_))

 

2、Tensorflow 函数tf.cocat([fw,bw],2)出错：TypeError: Expected int32, got list containing Tensors of type ‘_Message’ instead.

Expected int32, got list containing Tensors of type ‘_Message’ inst
原因是11版本的函数形式为:tf.concat(2,[fw,bw]),即应把串联的维度与串联值位置调换即可.

 

3、Input ‘split_dim’ of ‘Split’ Op has type float32 that does not match expected type of int32

#原来是这样的：
This is because in Tensorflow versions < 0.12.0 the split function takes the arguments as:
x = tf.split(0, n_steps, x) # tf.split(axis, num_or_size_splits, value)

#修改成这样的：
The tutorial you are working from was written for versions > 0.12.0, which has been changed to be consistent with Numpy’s split syntax:
x = tf.split(x, n_steps, 0) # tf.split(value, num_or_size_splits, axis)

 

4、‘module’ object has no attribute ‘pack’
因为TF后面的版本修改了这个函数的名称，把 tf.pack 改为 tf.stack。

 

5、The value of a feed cannot be a tf.Tensor object. Acceptable feed values include Python scalars, strings, lists, or numpy ndarrays
数据集是feed输入的，feed的数据格式是有要求的。
解决：img,label = sess.run[img,label], 用返回值。

 

6、module 'tensorflow.python.ops.nn' has no attribute 'rnn_cell'

#原因是1.0版本改了不少地方啊...
#原来是这样的：
from tensorflow.python.ops import rnn, rnn_cell 
lstm_cell = rnn_cell.BasicLSTMCell(rnn_size,state_is_tuple=True) 
outputs, states = rnn.rnn(lstm_cell, x, dtype=tf.float32)

#修改成这样的：
from tensorflow.contrib import rnn 
lstm_cell = rnn.BasicLSTMCell(rnn_size) 
outputs, states = rnn.static_rnn(lstm_cell, x, dtype=tf.float32)

 

7、Variable basic/rnn/basic_lstm_cell/weights does not exist, or was not created with tf.get_variable(). Did you mean to set reuse=None in VarScope?

with tf.variable_scope(scope_name, reuse=None) as scope:
    scope.reuse_variables()
    w = tf.get_variable("weight", shape, initializer = random_normal_initializer(0., 0.01)))
    b = tf.get_variable("biase", shape[-1], initializer = tf.constant_initializer(0.0))
#或：
with tf.variable_scope(scope_name, reuse=True):
    w = tf.get_variable("weight")
    b = tf.get_variable("biase")