Python convert XLSX file to XLS

Question

I am trying to write a python code to convert file .XLSX to XLS. I am written the following code:

 subprocess.call(['soffice', '--headless', '--convert-to', 'xls', '--outdir',/destination/floder, file.xlsx])

Now, the problem is that, this works only in localhost .

I try it in the server, but he doesn't work.