code: def absolute_path(path, from_file):
      
      if path is None:
          return None
      current_directory = os.path.dirname(from_file)
      target = os.path.join(current_directory, path)
      return os.path.abspath(target)
docs: Return the absolute path of a file or directory, specified
      as ``path`` relative to (the parent directory of) ``from_file``.
  
      This method is intented to be called with ``__file__``
      as second argument.
  
      If ``path`` is ``None``, return ``None``.
  
      Example: ::
  
          path="res/foo.bar"
          from_file="/abc/def/ghi.py"
          => "/abc/def/res/foo.bar"
  
      :param string path: the file path
      :param string from_file: the reference file
      :rtype: string