title: How to display dataframes?
body: <p>I am doing the Titanic problem in Kaggle and I have problems displaying the dataframe:</p>
  
  <pre><code>import pandas as pd
  import numpy as np
  
  titanic = pd.read_csv("input/train.csv")
  titanic.head()
  </code></pre>
  
  <p>This should display the <code>train.csv</code> but it doesn't. Do you know why?</p>