title: Increment slice object?
body: <p>Is it possible to change the values in a python slice object?</p>
  
  <p>For example, if I have </p>
  
  <pre><code>slice(0,1,None)
  </code></pre>
  
  <p>How would I, in effect, add 1 to the start and end values and so convert this to:</p>
  
  <pre><code>slice(1,2,None)
  </code></pre>