title: Representing infinity with python and IPython widgets
body: <p>I´m exploring the interact function (ipywidgets.interact) in jupyter notebook, and i wondered if there was a way to make slides 'go' to infinity, in the sense that i don´t especify a maximum or minimum value.
  for example the fuction:</p>
  
  <pre><code> def func(x):
       return 1/x
  </code></pre>
  
  <p>when I run</p>
  
  <pre><code>interact(func, x = (1,10,0.1))
  </code></pre>
  
  <p>¿is there a way to let the slider 'go to infinity' and show that the limit is 0?</p>