Firt try: mapreduce for counting

mapreduce.py

#coding: utf-8

def map(key, value):
    for word in value:
        yield (word,1)


def reduce(list_maps):

    reduced = {}

    for value in list_maps:
        if value[0] in reduced:
            reduced[value[0]] += value[1]
        else:
            reduced[value[0]] = value[1]

    return [(key, reduced[key]) for key in reduced]

if __name__=='__main__':
    """
    Attention: case sensitive!!!
    """
    text = open('longtext.txt').read()
    text = text.split() #remove all whitespaces
    mapped_text = map(None,text)

    reduced_text = reduce(mapped_text)

    print reduced_text