How do the count the number of sentences, words and characters in a file?

Question

I have written the following code to tokenize the input paragraph that comes from the file samp.txt. Can anybody help me out to find and print the number of sentences, words

Answer 1

Not 100% correct but I just gave a try. I have not taken all points by @wilhelmtell in to consideration. I try them once I have time...

if __name__ == "__main__":
   f = open("1.txt")
   c=w=0
   s=1
   prevIsSentence = False
   for x in f:
      x = x.strip()
      if x != "":
        words = x.split()
        w = w+len(words)
        c = c + sum([len(word) for word in words])
        prevIsSentence = True
      else:
        if prevIsSentence:
           s = s+1
        prevIsSentence = False

   if not prevIsSentence:
      s = s-1
   print "%d:%d:%d" % (c,w,s)

Here 1.txt is the file name.