code: def parse_config(filename, header):
      
  
      parser = SettingParser(filename)
      if parser.header != header:
          header_value = parser.header or ''
          raise ParseError(u"Unexpected header '{0}', expecting '{1}'"
                           .format(common.from_utf8(header_value), header))
  
      return parser
docs: Parses the provided filename and returns ``SettingParser`` if the
          parsing was successful and header matches the header defined in the
          file.
  
          Returns ``SettingParser`` instance.
  
          * Raises a ``ParseError`` exception if header doesn't match or parsing
            fails.