python/mllib/word2vec.py

0001 #
0002 # Licensed to the Apache Software Foundation (ASF) under one or more
0003 # contributor license agreements.  See the NOTICE file distributed with
0004 # this work for additional information regarding copyright ownership.
0005 # The ASF licenses this file to You under the Apache License, Version 2.0
0006 # (the "License"); you may not use this file except in compliance with
0007 # the License.  You may obtain a copy of the License at
0008 #
0009 #    http://www.apache.org/licenses/LICENSE-2.0
0010 #
0011 # Unless required by applicable law or agreed to in writing, software
0012 # distributed under the License is distributed on an "AS IS" BASIS,
0013 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014 # See the License for the specific language governing permissions and
0015 # limitations under the License.
0016 #
0017
0018 # This example uses text8 file from http://mattmahoney.net/dc/text8.zip
0019 # The file was downloaded, unzipped and split into multiple lines using
0020 #
0021 # wget http://mattmahoney.net/dc/text8.zip
0022 # unzip text8.zip
0023 # grep -o -E '\w+(\W+\w+){0,15}' text8 > text8_lines
0024 # This was done so that the example can be run in local mode
0025
0026 from __future__ import print_function
0027
0028 import sys
0029
0030 from pyspark import SparkContext
0031 from pyspark.mllib.feature import Word2Vec
0032
0033 USAGE = ("bin/spark-submit --driver-memory 4g "
0034          "examples/src/main/python/mllib/word2vec.py text8_lines")
0035
0036 if __name__ == "__main__":
0037     if len(sys.argv) < 2:
0038         print(USAGE)
0039         sys.exit("Argument for file not provided")
0040     file_path = sys.argv[1]
0041     sc = SparkContext(appName='Word2Vec')
0042     inp = sc.textFile(file_path).map(lambda row: row.split(" "))
0043
0044     word2vec = Word2Vec()
0045     model = word2vec.fit(inp)
0046
0047     synonyms = model.findSynonyms('china', 40)
0048
0049     for word, cosine_distance in synonyms:
0050         print("{}: {}".format(word, cosine_distance))
0051     sc.stop()