title: Python bokeh modify axis scale
body: <p>How can I modify the <code>y-axis</code> scale at figures and at charts? I want something like this: <code>my_figure.y_range.end = my_figure.y_range.end * 1.3</code></p>
  
  <p>So I want a bit higher <code>y-axis</code>. Thank you!</p>