kmeansReducer.py

#!/usr/bin/env python
import sys

currId = None
currXs = []
currYs = []
id = None

for line in sys.stdin:
    line = line.strip()
    print line
    ln = line.split('\t')
    id = ln[0]

    if str(currId) == str(id).replace(" ",""):
        currXs.append(int(ln[1]))
        currYs.append(int(ln[2]))
    else:
        if currId:
            centerX = sum(int(currXs))/len(currXs)
            centerY = sum(int(currYs))/len(currYs)
            print centerX," ",centerY

        currId = id
        currXs.append(int(ln[1]))
        currYs.append(int(ln[2]))

if str(currId) == str(id).replace(" ",""):
    centerX = sum(currXs)/len(currXs)
    centerY = sum(currYs)/len(currYs)
    print centerX," ",centerY