title: Xlsxwriter with xlsm file trouble
body: <p>I was wondering if its possible to write text into a cell that lies in a xlsm file using xlsxwriter? I have tried to do it on my own but it corrupts my workbook. Any ideas? My code is</p>
  <pre><code>import xlsxwriter
  
  text = 'hola amigos'
  
  book = xlsxwriter.Workbook('file.xlsm')
  
  sheet = book.add_worksheet()
  
  sheet.write_string(0,0,text)
  
  book.close()
  </code></pre>