@classmethod<EOL><INDENT>def from_file(cls, fn, *args, **kwargs):<DEDENT>
return AmiraHeader(get_parsed_data(fn, *args, **kwargs))<EOL>
Constructor to build an AmiraHeader object from a file

        :param str fn: Amira file
        :return ah: object of class ``AmiraHeader`` containing header metadata
        :rtype: ah: :py:class:`ahds.header.AmiraHeader`