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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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import logging as loggers |
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import numpy as np |
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from deepy.dataset import Dataset |
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from deepy.core.env import FLOATX |
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logging = loggers.getLogger(__name__) |
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class LMDataset(Dataset): |
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def __init__(self, vocab, train_path, valid_path, history_len=-1, char_based=False, max_tokens=999, min_tokens=0, sort=True): |
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""" |
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Generate data for training with RNN |
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:type vocab: vocab.Vocab |
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""" |
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assert history_len == -1 or history_len >= 1 |
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self.vocab = vocab |
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self.history_len = history_len |
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self.char_based = char_based |
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self.sort = sort |
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self.min_tokens = min_tokens |
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self.max_tokens = max_tokens |
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self._train_set = self.read_data(train_path) |
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self._valid_set = self.read_data(valid_path) |
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def train_set(self): |
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return self._train_set |
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def valid_set(self): |
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return self._valid_set |
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def read_data(self, path): |
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data = [] |
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sent_count = 0 |
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for line in open(path).xreadlines(): |
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line = line.strip() |
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wc = len(line) if self.char_based else line.count(" ") + 1 |
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if wc < self.min_tokens or wc > self.max_tokens: |
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continue |
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sent_count += 1 |
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sequence = [self.vocab.sent_index] |
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tokens = line if self.char_based else line.split(" ") |
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for w in tokens: |
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sequence.append(self.vocab.index(w)) |
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sequence.append(self.vocab.sent_index) |
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if self.history_len == -1: |
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# Full sentence |
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data.append(self.convert_to_data(sequence)) |
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else: |
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# trunk by trunk |
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for begin in range(0, len(sequence), self.history_len): |
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trunk = sequence[begin: begin + self.history_len + 1] |
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if len(trunk) > 1: |
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data.append(self.convert_to_data(trunk)) |
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if self.sort: |
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data.sort(key=lambda x: len(x[1])) |
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logging.info("loaded from %s: %d sentences, %d data pieces " % (path, sent_count, len(data))) |
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return data |
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def convert_to_data(self, seq): |
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assert len(seq) >= 2 |
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input_indices = seq[:-1] |
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target_indices = seq[1:] |
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return input_indices, target_indices |
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zomux /
deepy
