title: How to iterate over words in each row using pandas
body: <p>I have a dataframe like as shown below</p>
  <pre><code>df = pd.DataFrame({'text': [&quot;Hi how are you&quot;,&quot;I am fine&quot;,&quot;I love you&quot;,&quot;I hate you&quot;],
                     'tokens':[('Hi','how','are','you'),('I','am','fine'),('I','love','you'),('I','hate','you')]})
  </code></pre>
  <p>I would like to get the pos tag of each token</p>
  <pre><code>for tok in df['tokens'].iterrows():
    print(token, token.pos_)
  </code></pre>
  <p>Please note that the <code>pos_</code> here mean it is part of speech tag from nlp domain</p>
  <p>However, I get an error</p>
  <p>Can help me on how can I iterate over each item in the pandas column?</p>