The testpoints,source data.
Example command
hadoop jar hadoop-streaming-2.6.4.jar -input /data/sampleData2.txt -file centers.txt -mapper kmeansmapper.py -file kmeansmapper.py -reducer kmeanreducer.py -file kmeansreducer.py -file centers.txt -output /data/kmeans1
Euclidean distance
https://www.w3resource.com/python-exercises/math/python-math-exercise-79.php