title: How to add/overwrite a sheet of an already existing xlsx file without changing/deleting the other sheets
body: <p>I have a xlsx file named 'Results' with sheets 'Daily','DHW','SH'.
  I need to update daily results with a dataframe 'days', so that the old data in the 'Daily' sheet will be deleted and replaced by the new 'days' dataframe.
  Sheets 'DHW' and 'SH' must NOT be modified or deleted. Can anyone help me?</p>
  
  <pre><code>writer = pd.ExcelWriter(path, engine = 'xlsxwriter')
  days.to_excel(writer, sheet_name = 'Daily')
  writer.save()
  writer.close()
  </code></pre>
  
  <p>That's what i tried but i loose other sheets</p>