sample.py

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():
    #parses arguments from command line
    parser = argparse.ArgumentParser()
    parser.add_argument('--save_dir', type=str, default='save',
                       help='model directory to store checkpointed models')
    parser.add_argument('-n', type=int, default=200,
                       help='number of words to sample')
    parser.add_argument('--prime', type=str, default=' ',
                       help='prime text')
    parser.add_argument('--pick', type=int, default=1,
                       help='1 = weighted pick, 2 = beam search pick')
    parser.add_argument('--sample', type=int, default=1,
                       help='0 to use max at each timestep, 1 to sample at each timestep, 2 to sample on spaces')

    args = parser.parse_args()
    sample(args) #calls sample function

def sample(args):
    #open config and words_vocab
    with open(os.path.join(args.save_dir, 'config.pkl'), 'rb') as f:
        saved_args = cPickle.load(f)
    with open(os.path.join(args.save_dir, 'words_vocab.pkl'), 'rb') as f:
        words, vocab = cPickle.load(f)
    #load saved model
    model = Model(saved_args, True)
    with tf.Session() as sess:
        tf.global_variables_initializer().run()
        saver = tf.train.Saver(tf.global_variables())
        ckpt = tf.train.get_checkpoint_state(args.save_dir)
        if ckpt and ckpt.model_checkpoint_path:
            saver.restore(sess, ckpt.model_checkpoint_path) #restore session with model checkpoint
            #print sample from given model
            print(model.sample(sess, words, vocab, args.n, args.prime, args.sample, args.pick))
            return model.sample(sess, words, vocab, args.n, args.prime, args.sample, args.pick)


if __name__ == '__main__':
    main()