reducer

#!/usr/bin/python

import sys
import datetime
import operator

oldKey = None
counter = 0
countarray = {}  # dictionary
oldHrs = None


for line in sys.stdin:
    data = line.strip().split("\t")

    if len(data) != 2:
        continue

    userid,newHrs = data # data that is  taken from the array

    if oldKey and oldKey != userid:  # on first pass, olkey is not going to equal user id

        countarray[newHrs] = 1
        print userid,"\t", max(countarray.iterkeys(), key=lambda k: countarray[k])

    else:         # so we insert the hr (as the key) and a 1 for (the value)
        # if oldkey is equal to userid, then
        if newHrs in countarray:
            countarray[newHrs] += 1
            #countarray.update({newHrs:1})
        else:
            countarray[newHrs] = 1


    oldKey = userid
    oldHrs = newHrs


    countarray = {} # then we rest the dictionary


if oldKey != None:

   #print userid,"\t", max(countarray.iterkeys(), key=lambda k: countarray[k])