这个RNN文本分类代码怎么改成文本生成呢？

Question

我有这段代码可以使用 TensorFlow RNN 进行文本分类，但如何将其改为进行文本生成？

以下文本分类有3D输入，但有2D输出。文本生成要不要改成3D输入3D输出？以及如何？

示例数据为：

t0      t1      t2
british gray    is => cat (y=0)
0       1       2
white   samoyed is => dog (y=1)
3       4       2

对于分类喂养 "british gray is" 结果 "cat"。我希望得到的是喂养 "british" 应该导致下一个词 "gray".

import tensorflow as tf;
tf.reset_default_graph();

#data
'''
t0      t1      t2
british gray    is => cat (y=0)
0       1       2
white   samoyed is => dog (y=1)
3       4       2 
'''
Bsize = 2;
Times = 3;
Max_X = 4;
Max_Y = 1;

X = [[[0],[1],[2]], [[3],[4],[2]]];
Y = [[0],           [1]          ];

#normalise
for I in range(len(X)):
  for J in range(len(X[I])):
    X[I][J][0] /= Max_X;

for I in range(len(Y)):
  Y[I][0] /= Max_Y;

#model
Inputs   = tf.placeholder(tf.float32, [Bsize,Times,1]);
Expected = tf.placeholder(tf.float32, [Bsize,      1]);

#single LSTM layer
#'''
Layer1   = tf.keras.layers.LSTM(20);
Hidden1  = Layer1(Inputs);
#'''

#multi LSTM layers
'''
Layers = tf.keras.layers.RNN([
  tf.keras.layers.LSTMCell(30), #hidden 1
  tf.keras.layers.LSTMCell(20)  #hidden 2
]);
Hidden2 = Layers(Inputs);
'''

Weight3  = tf.Variable(tf.random_uniform([20,1], -1,1));
Bias3    = tf.Variable(tf.random_uniform([   1], -1,1));
Output   = tf.sigmoid(tf.matmul(Hidden1,Weight3) + Bias3);

Loss     = tf.reduce_sum(tf.square(Expected-Output));
Optim    = tf.train.GradientDescentOptimizer(1e-1);
Training = Optim.minimize(Loss);

#train
Sess = tf.Session();
Init = tf.global_variables_initializer();
Sess.run(Init);

Feed = {Inputs:X, Expected:Y};
for I in range(1000): #number of feeds, 1 feed = 1 batch
  if I%100==0: 
    Lossvalue = Sess.run(Loss,Feed);
    print("Loss:",Lossvalue);
  #end if

  Sess.run(Training,Feed);
#end for

Lastloss = Sess.run(Loss,Feed);
print("Loss:",Lastloss,"(Last)");

#eval
Results = Sess.run(Output,Feed);
print("\nEval:");
print(Results);

print("\nDone.");
#eof

Answer 1

我发现了如何切换它（代码）来执行文本生成任务，使用 3D 输入 (X) 和 3D 标签 (Y)，如下面的源代码所示：

源代码：

import tensorflow as tf;
tf.reset_default_graph();

#data
'''
t0       t1       t2
british  gray     is  cat
0        1        2   (3)  <=x
1        2        3        <=y
white    samoyed  is  dog
4        5        2   (6)  <=x
5        2        6        <=y 
'''
Bsize = 2;
Times = 3;
Max_X = 5;
Max_Y = 6;

X = [[[0],[1],[2]], [[4],[5],[2]]];
Y = [[[1],[2],[3]], [[5],[2],[6]]];

#normalise
for I in range(len(X)):
  for J in range(len(X[I])):
    X[I][J][0] /= Max_X;

for I in range(len(Y)):
  for J in range(len(Y[I])):
    Y[I][J][0] /= Max_Y;

#model
Input    = tf.placeholder(tf.float32, [Bsize,Times,1]);
Expected = tf.placeholder(tf.float32, [Bsize,Times,1]);

#single LSTM layer
'''
Layer1   = tf.keras.layers.LSTM(20);
Hidden1  = Layer1(Input);
'''

#multi LSTM layers
#'''
Layers = tf.keras.layers.RNN([
  tf.keras.layers.LSTMCell(30), #hidden 1
  tf.keras.layers.LSTMCell(20)  #hidden 2
],
return_sequences=True);
Hidden2 = Layers(Input);
#'''

Weight3  = tf.Variable(tf.random_uniform([20,1], -1,1));
Bias3    = tf.Variable(tf.random_uniform([   1], -1,1));
Output   = tf.sigmoid(tf.matmul(Hidden2,Weight3) + Bias3); #sequence of 2d * 2d

Loss     = tf.reduce_sum(tf.square(Expected-Output));
Optim    = tf.train.GradientDescentOptimizer(1e-1);
Training = Optim.minimize(Loss);

#train
Sess = tf.Session();
Init = tf.global_variables_initializer();
Sess.run(Init);

Feed   = {Input:X, Expected:Y};
Epochs = 10000;

for I in range(Epochs): #number of feeds, 1 feed = 1 batch
  if I%(Epochs/10)==0: 
    Lossvalue = Sess.run(Loss,Feed);
    print("Loss:",Lossvalue);
  #end if

  Sess.run(Training,Feed);
#end for

Lastloss = Sess.run(Loss,Feed);
print("Loss:",Lastloss,"(Last)");

#eval
Results = Sess.run(Output,Feed).tolist();
print("\nEval:");
for I in range(len(Results)):
  for J in range(len(Results[I])):
    for K in range(len(Results[I][J])):
      Results[I][J][K] = round(Results[I][J][K]*Max_Y);
#end for i      
print(Results);

print("\nDone.");
#eof

这个RNN文本分类代码怎么改成文本生成呢？

How to change this RNN text classification code to text generation?

nlp

machine-learning

text-classification

tensorflow

recurrent-neural-network