title: Circular list in Python
body: <p>I have a list in example <code>li = [1,2,3,4,5,6,7,8]</code>
  now I want slice of list exapmle:
  <code>li[1:4]</code> will give  <code>[2,3,4]</code></p>
  
  <p>now I want the other part of list i.e  <code>[5,6,7,8,1]</code>
  so how can I get it pythonically.</p>