title: How to create a dataframe with date range as values in a column?
body: <p>I have three variables</p>
  
  <p><strong>csiti - 23454 : (integer)</strong></p>
  
  <p><strong>units - [ 11,22,33,44,55,66,77] : (integer list which is of specific length 'n' always )</strong></p>
  
  <p><strong>begin_date - '2019-10-16' : (string)</strong></p>
  
  <p>How do I create a dataframe from this data like</p>
  
  <pre><code>csiti     units forecast_date
  1928422     11    2019-10-16  
  1928422     22    2019-10-17  
  1928422     33    2019-10-18  
  1928422     44    2019-10-19  
  1928422     55    2019-10-20  
  1928422     66    2019-10-21  
  1928422     77    2019-10-22  
  </code></pre>
  
  <p>The <code>forecast_date</code> column should be future dates starting from <code>begin_date</code> value.</p>