title: Display dataframe index name with Streamlit
body: <p>The following code does not display the name of the index:</p>
  <pre><code>import pandas as pd
  import streamlit as st
  
  df = pd.DataFrame(['row1', 'row2'], index=pd.Index([1, 2], name='my_index'))
  st.write(df)
  </code></pre>
  <p><a href="https://i.stack.imgur.com/rhift.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rhift.png" alt="Dataframe without " /></a></p>
  <p>Is there a way to have <code>my_index</code> displayed like you would do in a jupyter notebook?</p>
  <p><a href="https://i.stack.imgur.com/GnB86.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GnB86.png" alt="enter image description here" /></a></p>