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com.intel.analytics.bigdl.example.treeLSTMSentiment.Utils.scala Maven / Gradle / Ivy
/*
* Copyright 2016 The BigDL Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intel.analytics.bigdl.example.treeLSTMSentiment
import com.intel.analytics.bigdl.dataset.Sample
import com.intel.analytics.bigdl.example.utils.AbstractTextClassificationParams
import com.intel.analytics.bigdl.nn.TensorTree
import com.intel.analytics.bigdl.numeric.NumericFloat
import com.intel.analytics.bigdl.tensor.{Storage, Tensor}
import com.intel.analytics.bigdl.utils.RandomGenerator.RNG
import org.apache.spark.SparkContext
import org.apache.spark.broadcast.Broadcast
import org.apache.spark.rdd.RDD
import scopt.OptionParser
import scala.io.Source
import scala.language.existentials
import scala.reflect.ClassTag
import scala.util.control.Breaks._
object Utils {
def readTree(
parents: Array[Int]
): Tensor[Float] = {
val size = parents.length
val maxNumChildren = parents
.groupBy(x => x)
.foldLeft(0)((maxNum, p) => scala.math.max(maxNum, p._2.length))
val trees = new TensorTree(Tensor[Float](size, maxNumChildren + 1))
for (i <- parents.indices) {
if (trees.noChild(i + 1) && parents(i) != -1) {
var idx = i + 1
var prev = 0
breakable {
while (true) {
var parent =
if (idx != 0) parents(idx - 1)
else -1
if (parent == parents.length) parent = 0
if (prev != 0 && parent != -1) {
trees.addChild(idx + 1, prev + 1)
}
if (parent == -1) {
trees.markAsRoot(1)
if (prev != 0) {
trees.addChild(1, prev + 1)
}
break()
} else if (trees.hasChild(parent + 1)) {
trees.addChild(parent + 1, idx + 1)
break()
} else {
prev = idx
idx = parent
}
}
}
}
}
var leafIdx = 1
for (i <- 2 to size) {
if (trees.noChild(i)) {
trees.markAsLeaf(i, leafIdx)
leafIdx += 1
}
}
trees.content
}
def remapLabel(
label: Float
): Float = {
label + 3
}
/**
* Rotate an array `arr` from `offset` distance to the end
*
* @param arr Given array
* @param offset right rotate how many elements
*/
def rotate[D](arr: Array[D], offset: Int): Array[D] = {
if (arr == null || arr.length==0 || offset < 0) {
throw new IllegalArgumentException("Illegal argument!")
}
val newOffset = if (offset > arr.length) offset % arr.length else offset
val index = arr.length - newOffset
reverse(arr, 0, index - 1)
reverse(arr, index, arr.length - 1)
reverse(arr, 0, arr.length - 1)
arr
}
def reverse[D](arr: Array[D], l: Int, r: Int): Unit = {
var left = l
var right = r
if(arr == null || arr.length == 1) return
while(left < right) {
val temp = arr(left)
arr(left) = arr(right)
arr(right) = temp
left += 1
right -= 1
}
}
def preProcessData(
sc: SparkContext,
vocabBC: Broadcast[Map[String, Int]],
oovChar: Int,
treePath: String,
labelPath: String,
sentencePath: String
): (RDD[Tensor[Float]], RDD[Array[Float]], RDD[Array[Int]]) = {
val treeRDD = sc.textFile(treePath, 4)
.map(line => line.split(" "))
.map(_.map(_.toInt))
.map(readTree)
val labelRDD = sc.textFile(labelPath, 4)
.map(line => line.split(" "))
.map(_.map(l => remapLabel(l.toFloat)))
.map(line => rotate(line, 1))
val sentenceRDD = sc.textFile(sentencePath, 4)
.map(line => line.split(" "))
.map(line => line.map(vocabBC.value.getOrElse(_, oovChar)))
(treeRDD, labelRDD, sentenceRDD)
}
def toSample(
treeRDD: RDD[Tensor[Float]],
labelRDD: RDD[Array[Float]],
sentenceRDD: RDD[Array[Int]]
): RDD[Sample[Float]] = {
def indexAndSort[D: ClassTag, P <: Product2[Long, D]](rdd: RDD[D]) = {
rdd.zipWithIndex.map(r => r.swap).sortByKey()
}
indexAndSort(sentenceRDD)
.join(indexAndSort(labelRDD))
.join(indexAndSort(treeRDD))
.values
.map{ case ((input, label), tree) =>
Sample(
featureTensors =
Array(Tensor(input.map(_.toFloat), Array(input.length, 1)),
tree.resize(tree.size())),
labelTensor =
Tensor(label, Array(label.length)))
}
}
def loadEmbeddingAndVocabulary(
sc: SparkContext,
w2vPath: String,
vocabPath: String,
indexFrom: Int
):
(Tensor[Float], Map[String, Int]) = {
val word2Vec = sc.textFile(w2vPath)
.map(line => {
val values = line.split(" ")
val word = values(0)
val coefs = values.slice(1, values.length).map(_.toFloat)
word -> coefs
}).toLocalIterator.toList.toMap
var i = 1
val vocabLines = sc.textFile(vocabPath).collect()
val word2VecTensor =
Tensor(vocabLines.length + indexFrom - 1, word2Vec.last._2.length)
val vocab = scala.collection.mutable.Map[String, Int]()
while (i < indexFrom) {
word2VecTensor.select(1, i).apply1(_ => RNG.uniform(-0.05f, 0.05f).toFloat)
i += 1
}
for (line <- vocabLines) {
if (!word2Vec.contains(line)) {
word2VecTensor.select(1, i).apply1(_ => RNG.uniform(-0.05f, 0.05f).toFloat)
} else {
word2VecTensor.select(1, i).copy(Tensor(Storage(word2Vec(line))))
}
vocab += line -> i
i += 1
}
(word2VecTensor, vocab.toMap)
}
val paramParser = new OptionParser[TreeLSTMSentimentParam]("TreeLSTM Sentiment") {
opt[String]('b', "baseDir")
.text("Base dir containing the training and word2Vec data")
.action((x, c) => c.copy(baseDir = x))
opt[String]('i', "batchSize")
.text("batchSize")
.action((x, c) => c.copy(batchSize = x.toInt))
opt[String]('h', "hiddenSize")
.text("hiddenSize")
.action((x, c) => c.copy(hiddenSize = x.toInt))
opt[String]('l', "learingRate")
.text("learning rate")
.action((x, c) => c.copy(learningRate = x.toDouble))
opt[String]('r', "regRate")
.text("regularization rate")
.action((x, c) => c.copy(regRate = x.toDouble))
opt[String]('p', "p")
.text("dropout rate")
.action((x, c) => c.copy(p = x.toDouble))
opt[String]('e', "epoch")
.text("max epoch")
.action((x, c) => c.copy(epoch = x.toInt))
}
case class TreeLSTMSentimentParam (
override val baseDir: String = "/tmp/.bigdl/dataset/",
override val batchSize: Int = 128,
hiddenSize: Int = 250,
override val learningRate: Double = 0.05,
regRate: Double = 1e-4,
p: Double = 0.5,
epoch: Int = 5
) extends AbstractTextClassificationParams
}
