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| -rwxr-xr-x | python/examples/sort.py | 36 |
1 files changed, 36 insertions, 0 deletions
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 <master> <file>" + 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 |