docs: def read_exif_ifd(fh, byteorder, dtype, count, offsetsize):
      """Read EXIF tags from file and return as dict."""
      exif = read_tags(fh, byteorder, offsetsize, TIFF.EXIF_TAGS, maxifds=1)
      for name in ('ExifVersion', 'FlashpixVersion'):
          try:
              exif[name] = bytes2str(exif[name])
          except Exception:
              pass
      if 'UserComment' in exif:
          idcode = exif['UserComment'][:8]
          try:
              if idcode == b'ASCII\x00\x00\x00':
                  exif['UserComment'] = bytes2str(exif['UserComment'][8:])
              elif idcode == b'UNICODE\x00':
                  exif['UserComment'] = exif['UserComment'][8:].decode('utf-16')
          except Exception:
              pass
      return exif