Tensorflow生成唐诗和歌词（下）

整个工程使用的是Windows版pyCharm和tensorflow。

源码地址：https://github.com/Irvinglove/tensorflow_poems/tree/master

代码与上篇唐诗生成基本一致，不做过多解释。详细解释，请看：Tensorflow生成唐诗和歌词（上）

歌词生成

一、读取歌词的数据集（lyrics.py）

import collections
import os
import sys
import numpy as np
from utils.clean_cn import clean_cn_corpus
#import jieba
import pickle
import codecs

start_token = 'G'
end_token = 'E'

segment_list_file = os.path.abspath('./dataset/data/lyric_seg.pkl')

def process_lyrics(file_name):
    base_dir = os.path.dirname(file_name)
    save_file = os.path.join(base_dir, os.path.basename(file_name).split('.')[0] + '_cleaned.txt')
    start_token = 'G'
    end_token = 'E'
    if not os.path.exists(save_file):
        clean_cn_corpus(file_name, clean_level='all', is_save=False)
    else:
        pass

    with codecs.open(save_file, 'r', encoding="utf-8") as f:
        lyrics = []
        for line in f.readlines():
            if len(line) < 40:
                continue
            line = start_token + line + end_token
            lyrics.append(line)
        lyrics = sorted(lyrics, key=lambda line: len(line))
        print('all %d songs...' % len(lyrics))

    # if not os.path.exists(os.path.dirname(segment_list_file)):
    #     os.mkdir(os.path.dirname(segment_list_file))
    # if os.path.exists(segment_list_file):
    #     print('load segment file from %s' % segment_list_file)
    #     with open(segment_list_file, 'rb') as p:
    #         all_words = pickle.load(p)
    # else:
    all_words = []
    for lyric in lyrics:
        all_words += [word for word in lyric]
        # with open(segment_list_file, 'wb') as p:
        #     pickle.dump(all_words, p)
        #     print('segment result have been save into %s' % segment_list_file)

    # calculate how many time appear per word
    counter = collections.Counter(all_words)
    print(counter['E'])
    # sorted depends on frequent
    counter_pairs = sorted(counter.items(), key=lambda x: -x[1])
    words, _ = zip(*counter_pairs)
    print('E' in words)

    words = words[:len(words)] + (' ',)
    word_int_map = dict(zip(words, range(len(words))))
    # translate all lyrics into int vector
    lyrics_vector = [list(map(lambda word: word_int_map.get(word, len(words)), lyric)) for lyric in lyrics]
    return lyrics_vector, word_int_map, words

def generate_batch(batch_size, lyrics_vec, word_to_int):
    # split all lyrics into n_chunks * batch_size
    n_chunk = len(lyrics_vec) // batch_size
    x_batches = []
    y_batches = []
    for i in range(n_chunk):
        start_index = i * batch_size
        end_index = start_index + batch_size

        batches = lyrics_vec[start_index:end_index]
        # very batches length depends on the longest lyric
        length = max(map(len, batches))
        # 填充一个这么大小的空batch，空的地方放空格对应的index标号
        x_data = np.full((batch_size, length), word_to_int[' '], np.int32)
        for row in range(batch_size):
            x_data[row, :len(batches[row])] = batches[row]
        y_data = np.copy(x_data)
        # y的话就是x向左边也就是前面移动一个
        y_data[:, :-1] = x_data[:, 1:]
        """
        x_data             y_data
        [6,2,4,6,9]       [2,4,6,9,9]
        [1,4,2,8,5]       [4,2,8,5,5]
        """
        x_batches.append(x_data)
        y_batches.append(y_data)
    return x_batches, y_batches

源代码那里有点问题

将"import jieba"注释掉

错误代码：

all_words += jieba.lcut(lyric, cut_all=False)

改为：

all_words += [word for word in lyric]

二、模型构建（model.py）

import tensorflow as tf
import numpy as np

def rnn_model(model, input_data, output_data, vocab_size, rnn_size=128, num_layers=2, batch_size=64,
              learning_rate=0.01):

    end_points = {}
    # 构建RNN基本单元RNNcell
    if model == 'rnn':
        cell_fun = tf.contrib.rnn.BasicRNNCell
    elif model == 'gru':
        cell_fun = tf.contrib.rnn.GRUCell
    else:
        cell_fun = tf.contrib.rnn.BasicLSTMCell

    cell = cell_fun(rnn_size, state_is_tuple=True)
    # 构建堆叠rnn，这里选用两层的rnn
    cell = tf.contrib.rnn.MultiRNNCell([cell] * num_layers, state_is_tuple=True)
    # 如果是训练模式，output_data不为None，则初始状态shape为[batch_size * rnn_size]
    # 如果是生成模式，output_data为None，则初始状态shape为[1 * rnn_size]
    if output_data is not None:
        initial_state = cell.zero_state(batch_size, tf.float32)
    else:
        initial_state = cell.zero_state(1, tf.float32)

    # 构建隐层
    with tf.device("/cpu:0"):
        embedding = tf.get_variable('embedding', initializer=tf.random_uniform(
            [vocab_size + 1, rnn_size], -1.0, 1.0))
        inputs = tf.nn.embedding_lookup(embedding, input_data)

    # [batch_size, ?, rnn_size] = [64, ?, 128]
    outputs, last_state = tf.nn.dynamic_rnn(cell, inputs, initial_state=initial_state)
    output = tf.reshape(outputs, [-1, rnn_size])

    weights = tf.Variable(tf.truncated_normal([rnn_size, vocab_size + 1]))
    bias = tf.Variable(tf.zeros(shape=[vocab_size + 1]))
    logits = tf.nn.bias_add(tf.matmul(output, weights), bias=bias)
    # [?, vocab_size+1]

    if output_data is not None:
        # output_data must be one-hot encode
        labels = tf.one_hot(tf.reshape(output_data, [-1]), depth=vocab_size + 1)
        # should be [?, vocab_size+1]

        loss = tf.nn.softmax_cross_entropy_with_logits(labels=labels, logits=logits)
        # loss shape should be [?, vocab_size+1]
        total_loss = tf.reduce_mean(loss)
        train_op = tf.train.AdamOptimizer(learning_rate).minimize(total_loss)

        end_points['initial_state'] = initial_state
        end_points['output'] = output
        end_points['train_op'] = train_op
        end_points['total_loss'] = total_loss
        end_points['loss'] = loss
        end_points['last_state'] = last_state
    else:
        prediction = tf.nn.softmax(logits)

        end_points['initial_state'] = initial_state
        end_points['last_state'] = last_state
        end_points['prediction'] = prediction

    return end_points

三、模型训练（song_lyrics.py）

import collections
import os
import sys
import numpy as np
import tensorflow as tf
from models.model import rnn_model
from dataset.lyrics import process_lyrics, generate_batch

tf.app.flags.DEFINE_integer('batch_size', 20, 'batch size.')
tf.app.flags.DEFINE_float('learning_rate', 0.01, 'learning rate.')

tf.app.flags.DEFINE_string('file_path', os.path.abspath('./dataset/data/周杰伦歌词大全.txt'), 'file path of lyrics.')
tf.app.flags.DEFINE_string('checkpoints_dir', os.path.abspath('./checkpoints/lyrics'), 'checkpoints save path.')
tf.app.flags.DEFINE_string('model_prefix', 'lyrics', 'model save prefix.')

tf.app.flags.DEFINE_integer('epochs', 500, 'train how many epochs.')

FLAGS = tf.app.flags.FLAGS

start_token = 'G'
end_token = 'E'

def run_training():
    if not os.path.exists(os.path.dirname(FLAGS.checkpoints_dir)):
        os.mkdir(os.path.dirname(FLAGS.checkpoints_dir))
    if not os.path.exists(FLAGS.checkpoints_dir):
        os.mkdir(FLAGS.checkpoints_dir)

    poems_vector, word_to_int, vocabularies = process_lyrics(FLAGS.file_path)
    batches_inputs, batches_outputs = generate_batch(FLAGS.batch_size, poems_vector, word_to_int)

    input_data = tf.placeholder(tf.int32, [FLAGS.batch_size, None])
    output_targets = tf.placeholder(tf.int32, [FLAGS.batch_size, None])

    end_points = rnn_model(model='lstm', input_data=input_data, output_data=output_targets, vocab_size=len(
        vocabularies), rnn_size=128, num_layers=2, batch_size=FLAGS.batch_size, learning_rate=FLAGS.learning_rate)

    saver = tf.train.Saver(tf.global_variables())
    init_op = tf.group(tf.global_variables_initializer(), tf.local_variables_initializer())
    with tf.Session() as sess:
        # sess = tf_debug.LocalCLIDebugWrapperSession(sess=sess)
        # sess.add_tensor_filter("has_inf_or_nan", tf_debug.has_inf_or_nan)
        sess.run(init_op)

        start_epoch = 0
        checkpoint = tf.train.latest_checkpoint(FLAGS.checkpoints_dir)
        if checkpoint:
            saver.restore(sess, checkpoint)
            print("[INFO] restore from the checkpoint {0}".format(checkpoint))
            start_epoch += int(checkpoint.split('-')[-1])
        print('[INFO] start training...')
        try:
            for epoch in range(start_epoch, FLAGS.epochs):
                n = 0
                n_chunk = len(poems_vector) // FLAGS.batch_size
                for batch in range(n_chunk):
                    loss, _, _ = sess.run([
                        end_points['total_loss'],
                        end_points['last_state'],
                        end_points['train_op']
                    ], feed_dict={input_data: batches_inputs[n], output_targets: batches_outputs[n]})
                    n += 1
                    print('[INFO] Epoch: %d , batch: %d , training loss: %.6f' % (epoch, batch, loss))
                if epoch % 20 == 0:
                    saver.save(sess, os.path.join(FLAGS.checkpoints_dir, FLAGS.model_prefix), global_step=epoch)
        except KeyboardInterrupt:
            print('[INFO] Interrupt manually, try saving checkpoint for now...')
            saver.save(sess, os.path.join(FLAGS.checkpoints_dir, FLAGS.model_prefix), global_step=epoch)
            print('[INFO] Last epoch were saved, next time will start from epoch {}.'.format(epoch))

def to_word(predict, vocabs):
    t = np.cumsum(predict)
    s = np.sum(predict)
    sample = int(np.searchsorted(t, np.random.rand(1) * s))
    if sample > len(vocabs)-1:
        sample = len(vocabs) - 100
    return vocabs[sample]

def gen_lyric():
    batch_size = 1
    poems_vector, word_int_map, vocabularies = process_lyrics(FLAGS.file_path)

    input_data = tf.placeholder(tf.int32, [batch_size, None])

    end_points = rnn_model(model='lstm', input_data=input_data, output_data=None, vocab_size=len(
        vocabularies), rnn_size=128, num_layers=2, batch_size=64, learning_rate=FLAGS.learning_rate)

    saver = tf.train.Saver(tf.global_variables())
    init_op = tf.group(tf.global_variables_initializer(), tf.local_variables_initializer())
    with tf.Session() as sess:
        sess.run(init_op)

        checkpoint = tf.train.latest_checkpoint(FLAGS.checkpoints_dir)
        saver.restore(sess, checkpoint)

        x = np.array([list(map(word_int_map.get, start_token))])

        [predict, last_state] = sess.run([end_points['prediction'], end_points['last_state']],
                                         feed_dict={input_data: x})

        word = to_word(predict, vocabularies)
        print(word)
        lyric = ''
        while word != end_token:
            lyric += word
            x = np.zeros((1, 1))
            x[0, 0] = word_int_map[word]
            [predict, last_state] = sess.run([end_points['prediction'], end_points['last_state']],
                                             feed_dict={input_data: x, end_points['initial_state']: last_state})
            word = to_word(predict, vocabularies)
        # word = words[np.argmax(probs_)]
        return lyric

def main(is_train):
    if is_train:
        print('[INFO] train song lyric...')
        run_training()
    else:
        print('[INFO] compose song lyric...')
        lyric = gen_lyric()
        lyric_sentences = lyric.split(' ')
        for l in lyric_sentences:
            print(l)
            # if 4 < len(l) < 20:
            #     print(l)

if __name__ == '__main__':
    tf.app.run()

四、主函数（main.py）

import argparse

def parse_args():
    parser = argparse.ArgumentParser(description='Intelligence Poem and Lyric Writer.')

    help_ = 'you can set this value in terminal --write value can be poem or lyric.'
    parser.add_argument('-w', '--write', default='lyric', choices=['poem', 'lyric'], help=help_)

    help_ = 'choose to train or generate.'
    parser.add_argument('--train', dest='train', action='store_true', help=help_)
    parser.add_argument('--no-train', dest='train', action='store_false', help=help_)
    parser.set_defaults(train=True)

    args_ = parser.parse_args()
    return args_

if __name__ == '__main__':
    args = parse_args()
    if args.write == 'poem':
        from inference import tang_poems
        if args.train:
            tang_poems.main(True)
        else:
            tang_poems.main(False)
    elif args.write == 'lyric':
        from inference import song_lyrics
        print(args.train)
        if args.train:
            song_lyrics.main(True)
        else:
            song_lyrics.main(False)
    else:
        print('[INFO] write option can only be poem or lyric right now.')

1. 训练歌词模型，主要就是修改default和train的参数。将default='lyric'，train=True

2. 生成歌词。default='lyric'，train=False