title: how to display inputbox dynamically using select widget in bokeh
body: <p>I am trying to implement chart in bokeh depending upon the user input, the requirement is cascade the dropdown so that it will make appearance of textbox depending upon the selected item in the dropdown </p>
  
  <ul>
  <li>if I select fruits, dynamically it should ask the input for price and quantity</li>
  <li>if I select human, dynamically it should ask me the input for the name and age</li>
  </ul>
  
  <p>I am new to bokeh Please help 
  thanks in advance</p>