from __future__ import print_function
import numpy as np
import tensorflow as tf
import argparse
import time
import os
from six.moves import cPickle
from utils import TextLoader
from model import Model
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--data_dir', type=str, default='data/tinyshakespeare',
help='data directory containing input.txt')
parser.add_argument('--save_dir', type=str, default='save',
help='directory to store checkpointed models')
parser.add_argument('--rnn_size', type=int, default=128,
help='size of RNN hidden state')
parser.add_argument('--num_layers', type=int, default=2,
help='number of layers in the RNN')
parser.add_argument('--model', type=str, default='lstm',
help='rnn, gru, or lstm')
parser.add_argument('--activation', type=str, default='tanh',
help='tanh, sigmoid, or relu')
parser.add_argument('--batch_size', type=int, default=50,
help='minibatch size')
parser.add_argument('--seq_length', type=int, default=50,
help='RNN sequence length')
parser.add_argument('--dropout', type=float, default=1.0,
help='keep rate')
parser.add_argument('--num_epochs', type=int, default=50,
help='number of epochs')
parser.add_argument('--save_every', type=int, default=1000,
help='save frequency')
parser.add_argument('--grad_clip', type=float, default=5.,
help='clip gradients at this value')
parser.add_argument('--learning_rate', type=float, default=0.002,
help='learning rate')
parser.add_argument('--bidirectional', type=bool, default=False,
help='1 or 0')
parser.add_argument('--decay_rate', type=float, default=0.97,
help='decay rate for rmsprop')
parser.add_argument('--init_from', type=str, default=None,
help="""continue training from saved model at this path. Path must contain files saved by previous training process:
'config.pkl' : configuration;
'chars_vocab.pkl' : vocabulary definitions;
'checkpoint' : paths to model file(s) (created by tf).
Note: this file contains absolute paths, be careful when moving files around;
'model.ckpt-*' : file(s) with model definition (created by tf)
""")
args = parser.parse_args()
train(args)
def train(args):
data_loader = TextLoader(args.data_dir, args.batch_size, args.seq_length)
args.vocab_size = data_loader.vocab_size
# check compatibility if training is continued from previously saved model
if args.init_from is not None:
# check if all necessary files exist
assert os.path.isdir(args.init_from)," %s must be a a path" % args.init_from
assert os.path.isfile(os.path.join(args.init_from,"config.pkl")),"config.pkl file does not exist in path %s"%args.init_from
assert os.path.isfile(os.path.join(args.init_from,"chars_vocab.pkl")),"chars_vocab.pkl.pkl file does not exist in path %s" % args.init_from
ckpt = tf.train.get_checkpoint_state(args.init_from)
assert ckpt,"No checkpoint found"
assert ckpt.model_checkpoint_path,"No model path found in checkpoint"
# open old config and check if models are compatible
with open(os.path.join(args.init_from, 'config.pkl')) as f:
saved_model_args = cPickle.load(f)
need_be_same=["model","rnn_size","num_layers","seq_length"]
for checkme in need_be_same:
assert vars(saved_model_args)[checkme]==vars(args)[checkme],"Command line argument and saved model disagree on '%s' "%checkme
# open saved vocab/dict and check if vocabs/dicts are compatible
with open(os.path.join(args.init_from, 'chars_vocab.pkl')) as f:
saved_chars, saved_vocab = cPickle.load(f)
assert saved_chars==data_loader.chars, "Data and loaded model disagreee on character set!"
assert saved_vocab==data_loader.vocab, "Data and loaded model disagreee on dictionary mappings!"
# JZ
os.system('mkdir -p ' + args.save_dir)
with open(os.path.join(args.save_dir, 'config.pkl'), 'wb') as f:
cPickle.dump(args, f)
with open(os.path.join(args.save_dir, 'chars_vocab.pkl'), 'wb') as f:
cPickle.dump((data_loader.chars, data_loader.vocab), f)
model = Model(args)
# JZ:
# f = open(args.save_dir+'/train_losses/'+args.model+'_'+str(args.seq_length)+'_'+str(args.num_layers)+'_'+str(args.learning_rate),'a')
with tf.Session() as sess:
tf.initialize_all_variables().run()
saver = tf.train.Saver(tf.all_variables())
# restore model
if args.init_from is not None:
saver.restore(sess, ckpt.model_checkpoint_path)
for e in range(args.num_epochs):
sess.run(tf.assign(model.lr, args.learning_rate * (args.decay_rate ** e)))
data_loader.reset_batch_pointer()
state = model.initial_state.eval()
for b in range(data_loader.num_batches):
start = time.time()
x, y = data_loader.next_batch()
feed = {model.input_data: x, model.targets: y, model.initial_state: state}
train_loss, state, _ = sess.run([model.cost, model.final_state, model.train_op], feed)
end = time.time()
print("{}/{} (epoch {}), train_loss = {:.3f}, time/batch = {:.3f}" \
.format(e * data_loader.num_batches + b,
args.num_epochs * data_loader.num_batches,
e, train_loss, end - start))
if (e * data_loader.num_batches + b) % args.save_every == 0\
or (e==args.num_epochs-1 and b == data_loader.num_batches-1): # save for the last result
checkpoint_path = os.path.join(args.save_dir, 'model.ckpt')
saver.save(sess, checkpoint_path, global_step = e * data_loader.num_batches + b)
print("model saved to {}".format(checkpoint_path))
# JZ:
# f.write(str(train_loss)+'\n')
# f.close()
if __name__ == '__main__':
main()
Datasets
Models
