code: def alter_subprocess_kwargs_by_platform(**kwargs):
      
      kwargs.setdefault('close_fds', os.name == 'posix')
      if os.name == 'nt':
          CONSOLE_CREATION_FLAGS = 0  # Default value
          # See: https://msdn.microsoft.com/en-us/library/windows/desktop/ms684863%28v=vs.85%29.aspx
          CREATE_NO_WINDOW = 0x08000000
          # We "or" them together
          CONSOLE_CREATION_FLAGS |= CREATE_NO_WINDOW
          kwargs.setdefault('creationflags', CONSOLE_CREATION_FLAGS)
      return kwargs
docs: Given a dict, populate kwargs to create a generally
      useful default setup for running subprocess processes
      on different platforms. For example, `close_fds` is
      set on posix and creation of a new console window is
      disabled on Windows.
  
      This function will alter the given kwargs and return
      the modified dict.