Counting unique words in python

Question

In direct, my code so far is this :

from glob import glob
pattern = \"D:\\\\report\\\\shakeall\\\\*.txt\"
filelist = glob(pattern)
def countwords(fp):
    w         


        

Answer 1

print len(set(w.lower() for w in open('filename.dat').read().split()))

Reads the entire file into memory, splits it into words using whitespace, converts each word to lower case, creates a (unique) set from the lowercase words, counts them and prints the output