code: def from_file(filename, mime=False):
      
  
      head, foot = _file_details(filename)
      return _magic(head, foot, mime, ext_from_filename(filename))
docs: Opens file, attempts to identify content based
      off magic number and will return the file extension.
      If mime is True it will return the mime type instead.
  
      :param filename: path to file
      :param mime: Return mime, not extension
      :return: guessed extension or mime