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generate.py
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generate.py
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###############################################################################
# Language Modeling on Penn Tree Bank
#
# This file generates new sentences sampled from the language model
#
###############################################################################
import argparse
import torch
from torch.autograd import Variable
import data
parser = argparse.ArgumentParser(description='PyTorch PTB Language Model')
# Model parameters.
parser.add_argument('--data', type=str, default='/input',
help='location of the data corpus')
parser.add_argument('--checkpoint', type=str, default='/model/model.pt',
help='model checkpoint to use')
parser.add_argument('--outf', type=str, default='/output/generated.txt',
help='output file for generated text')
parser.add_argument('--words', type=int, default='1000',
help='number of words to generate')
parser.add_argument('--seed', type=int, default=1111,
help='random seed')
parser.add_argument('--cuda', action='store_true',
help='use CUDA')
parser.add_argument('--temperature', type=float, default=1.0,
help='temperature - higher will increase diversity')
parser.add_argument('--log-interval', type=int, default=100,
help='reporting interval')
args = parser.parse_args()
# Set the random seed manually for reproducibility.
torch.manual_seed(args.seed)
if torch.cuda.is_available():
if not args.cuda:
print("WARNING: You have a CUDA device, so you should probably run with --cuda")
else:
torch.cuda.manual_seed(args.seed)
if args.temperature < 1e-3:
parser.error("--temperature has to be greater or equal 1e-3")
# Load checkpoint
if args.checkpoint != '':
if args.cuda:
model = torch.load(args.checkpoint)
else:
# Load GPU model on CPU
model = torch.load(args.checkpoint, map_location=lambda storage, loc: storage)
model.eval()
if args.cuda:
model.cuda()
else:
model.cpu()
corpus = data.Corpus(args.data)
ntokens = len(corpus.dictionary)
hidden = model.init_hidden(1)
input = Variable(torch.rand(1, 1).mul(ntokens).long(), volatile=True)
if args.cuda:
input.data = input.data.cuda()
with open(args.outf, 'w') as outf:
for i in range(args.words):
output, hidden = model(input, hidden)
word_weights = output.squeeze().data.div(args.temperature).exp().cpu()
word_idx = torch.multinomial(word_weights, 1)[0]
input.data.fill_(word_idx)
word = corpus.dictionary.idx2word[word_idx]
# word = '\n' if word == "<eos>" else word
outf.write(word + ('\n' if i % 20 == 19 else ' '))
if i % args.log_interval == 0:
print('| Generated {}/{} words'.format(i, args.words))