title: Add a new sheet to a existing workbook in python
body: <p>I have browsed almost all the previous threads, but still cannot get this working.I am trying to add a new sheet to an existing workbook. My code works,but it keeps on adding a lot more (so many of them actually) sheets. I can't figure out the solution.Below is my code</p>
  
  <pre><code>from openpyxl import load_workbook
  wb2 = load_workbook('template.xlsx')
  from xlutils.copy import copy as xl_copy
  wb = xl_copy(wb2)
  wb.create_sheet('sid1')
  wb.save('template.xlsx')
  </code></pre>