anchor.diff:  
   @rem otherwise we search for a suitable Python interpreter
   :find_python
  -
   @rem First check the existence of the "py" launcher (available in Python 3)
   @rem if we have it, check if we have a py -3 installed with the good version or a py 2.7
   @rem if not, check if we have an old py 2.7
  
positive.code: 
  :activate
  @rem Activate the virtualenv
  if exist "%CFG_ROOT_DIR%Scripts\activate" (
      "%CFG_ROOT_DIR%Scripts\activate"
  )
  
negative.code:     )
  )
  
  
  :run
  @rem without this things may not always work on Windows 10, but this makes things slower
  set PYTHONDONTWRITEBYTECODE=1
  
  