title: Using slice() but want to use start, and length. Is this possible?
body: <p>I have almost a hundred columns to classify from a mainframe file with no delimits and am using slice functionality to achieve this.  I'm slicing each location into a list, then combining these lists to then create a Pandas dataframe to perform additional analysis on.</p>
  <pre><code>    a = slice(0,10)
      b = slice(10,25)
  </code></pre>
  <p>However, I know the start location, and the length of each string.  Is there a similar way to classify using start and length instead of start and end?</p>