title: AttributeError: 'str' object has no attribute 'words'
body: <p>I'm using Python34.
  I want to get frequency of words from CSV file but it show an error.
  Here is my code.Anyone help me to solve this problem.</p>
  
  <pre><code>from textblob import TextBlob as tb
  import math
  
  words={}
  def tfidf(word, blob, bloblist):
      return tf(word, blob) * idf(word, bloblist)
  
  def tf(word, blob):
      return blob.words.count(word) / len(blob.words)
  
  def n_containing(word, bloblist):
      return sum(1 for blob in bloblist if word in blob)
  
  def idf(word, bloblist):
      return math.log(len(bloblist) / (1 + n_containing(words, bloblist)))
  
  bloblist = open('afterstopwords.csv', 'r').read()
  
  for i, blob in enumerate(bloblist):
       print("Top words in document {}".format(i + 1))
       scores = {word: tfidf(word, blob, bloblist) for word in blob.words}
       sorted_words = sorted(scores.items(), key=lambda x: x[1], reverse=True)
       for word, score in sorted_words[:3]:
           print("\tWord: {}, TF-IDF: {}".format(word, round(score, 5)))
  </code></pre>
  
  <p>And the error is:</p>
  
  <pre><code> Top words in document 1
   Traceback (most recent call last):
   File "D:\Python34\tfidf.py", line 45, in &lt;module&gt;
      scores = {word: tfidf(word, blob, bloblist) for word in blob.words}
   AttributeError: 'str' object has no attribute 'words'
  </code></pre>