title: Python remove stop words from pandas dataframe
body: <p>I want to remove the stop words from my column "tweets". How do I iterative over each row and each item?</p>
  
  <pre><code>pos_tweets = [('I love this car', 'positive'),
      ('This view is amazing', 'positive'),
      ('I feel great this morning', 'positive'),
      ('I am so excited about the concert', 'positive'),
      ('He is my best friend', 'positive')]
  
  test = pd.DataFrame(pos_tweets)
  test.columns = ["tweet","class"]
  test["tweet"] = test["tweet"].str.lower().str.split()
  
  from nltk.corpus import stopwords
  stop = stopwords.words('english')
  </code></pre>