title: How to write the list into corresponding columns
body: <p>Thanks in advance! I have 3 lists with text, each of them comes with 8 datapoints.</p>
  
  <p>I want the output into the A,C,D columns of excel spreadsheet.</p>
  
  <p>I'm using the <code>pyExcelerator</code>, the biggest problem is when I rerun the program, it replaces the original program. I just want the results adding to the existing excel spreadsheet. Like <code>a</code> option in <code>file.write</code>.</p>
  
  <pre><code>    indexlist = list();
      indexlist2 = list();
      indexlist3 = list();
      #keep adding new element at same speed
      indexlist.append(a);
      indexlist2.append(b);
      indexlist3.append(c);
  
  
  #create the new excel spreadsheet   
  w = Workbook()  
  ws = w.add_sheet('sheet') 
  
  for i in range(len(indexlist)):
      ws.write(i+1,3,str(indexlist[i]))   
  for j in range(len(indexlist2)):
      ws.write(j+1,2,str(indexlist2[j]))  
  for k in range(len(indexlist3)):
      ws.write(k+1,0,str(indexlist3[k]))  
  </code></pre>