def wordLengthStats(filename):
    file = open(filename, 'r')
    wordcount={}
    for line in file.read().split():
        if line not in wordcount:
            wordcount[line] = 1
        else:
            wordcount[line] += 1
    for k,v in wordcount.items():
        print (k, v)
    return None

def main():

    d = wordLengthStats("sample.txt")
    print("d should be { 3:5, 4:2, 5:1, 8:1, 10:1} ")
    print("d is", d)

if __name__ == '__main__':
    main()