#!/usr/bin/env python"""mapper.py"""import sys# input comes from STDIN (standard input)for line in sys.stdin: # remove leading and trailing whitespace line = line.strip() # split the line into words words = line.split() # increase counters for word in words: # write the results to STDOUT (standard output); # what we output here will be the input for the # Reduce step i.e. the input for reducer.py # # tab-delimited; the trivial word count is 1 print '%s\t%s' % (word 1)