From 2ef37c93664d74de6d7f6144834883a4a4ef79b7 Mon Sep 17 00:00:00 2001 From: jyotiska Date: Sat, 8 Feb 2014 23:36:48 -0800 Subject: Merge pull request #562 from jyotiska/master. Closes #562. Added example Python code for sort I added an example Python code for sort. Right now, PySpark has limited examples for new people willing to use the project. This example code sorts integers stored in a file. I was able to sort 5 million, 10 million and 25 million integers with this code. Author: jyotiska == Merge branch commits == commit 8ad8faf6c8e02ae1cd68565d98524edf165f54df Author: jyotiska Date: Sun Feb 9 11:00:41 2014 +0530 Added comments in code on collect() method commit 6f98f1e313f4472a7c2207d36c4f0fbcebc95a8c Author: jyotiska Date: Sat Feb 8 13:12:37 2014 +0530 Updated python example code sort.py commit 945e39a5d68daa7e5bab0d96cbd35d7c4b04eafb Author: jyotiska Date: Sat Feb 8 12:59:09 2014 +0530 Added example python code for sort --- python/examples/sort.py | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100755 python/examples/sort.py (limited to 'python') diff --git a/python/examples/sort.py b/python/examples/sort.py new file mode 100755 index 0000000000..5de20a6d98 --- /dev/null +++ b/python/examples/sort.py @@ -0,0 +1,36 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You 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. +# + +import sys + +from pyspark import SparkContext + + +if __name__ == "__main__": + if len(sys.argv) < 3: + print >> sys.stderr, "Usage: sort " + exit(-1) + sc = SparkContext(sys.argv[1], "PythonSort") + lines = sc.textFile(sys.argv[2], 1) + sortedCount = lines.flatMap(lambda x: x.split(' ')) \ + .map(lambda x: (int(x), 1)) \ + .sortByKey(lambda x: x) + # This is just a demo on how to bring all the sorted data back to a single node. + # In reality, we wouldn't want to collect all the data to the driver node. + output = sortedCount.collect() + for (num, unitcount) in output: + print num -- cgit v1.2.3