title: Python - Apply the formatting of an existing workbook to another workbook
body: <p>I am relatively new to coding in Python, and here is my problem:
   1- When I update data of an existing .xlsx file (using openpyxl), the outcome is a .xlsx that looses all the previous formatting. I've also tried with .xls (using xlwt and xlrd), but nothing changed.
   2- So, I decided to keep this unformatted outcome file and apply all the formatting of a template .xls(x) file.</p>
  
  <p>Is there an straight forward way to preserve the formatting at the step 1? if not, how can I implement step 2?</p>
  
  <p>P.S: I've tried to handle styles with xlutils.styles... but I didn't manage to...</p>
  
  <p>Thanks for your help!     </p>