title: How can I get a TF feature column from a dataframe column?
body: <p>I have a dataframe:</p>
  
  <p><a href="https://i.stack.imgur.com/eHkgG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eHkgG.png" alt="enter image description here"></a>
  I want to create a feature column out of the integer "length" column of this dataframe. How can I achieve that?</p>