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To speed things up, we don't decode tags unless they're asked for. Exposes a dictionary interface of the tags in the directory:: ifd = ImageFileDirectory_v2() ifd[key] = 'Some Data' ifd.tagtype[key] = TiffTags.ASCII print(ifd[key]) 'Some Data' Individual values are returned as the strings or numbers, sequences are returned as tuples of the values. The tiff metadata type of each item is stored in a dictionary of tag types in :attr:`~PIL.TiffImagePlugin.ImageFileDirectory_v2.tagtype`. The types are read from a tiff file, guessed from the type added, or added manually. Data Structures: * ``self.tagtype = {}`` * Key: numerical TIFF tag number * Value: integer corresponding to the data type from :py:data:`.TiffTags.TYPES` .. versionadded:: 3.0.0 'Internal' data structures: * ``self._tags_v2 = {}`` * Key: numerical TIFF tag number * Value: decoded data, as tuple for multiple values * ``self._tagdata = {}`` * Key: numerical TIFF tag number * Value: undecoded byte string from file * ``self._tags_v1 = {}`` * Key: numerical TIFF tag number * Value: decoded data in the v1 format Tags will be found in the private attributes ``self._tagdata``, and in ``self._tags_v2`` once decoded. ``self.legacy_api`` is a value for internal use, and shouldn't be changed from outside code. In cooperation with :py:class:`~PIL.TiffImagePlugin.ImageFileDirectory_v1`, if ``legacy_api`` is true, then decoded tags will be populated into both ``_tags_v1`` and ``_tags_v2``. ``_tags_v2`` will be used if this IFD is used in the TIFF save routine. 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Nz{}lrcr@rhrArBrCr.r2rDrEz;ImageFileDirectory_v2.load_signed_rational..combinec3rFrhr.rGrJr.r2rrKz=ImageFileDirectory_v2.load_signed_rational..rrrLrNr.rPr2load_signed_rationalrRz*ImageFileDirectory_v2.load_signed_rationalcrS)Nr%c3s*|]}jdgt|ddRVqdS)2liiN)rrorUrr.r2rs  z>ImageFileDirectory_v2.write_signed_rational..r&r(r.rr2write_signed_rationalsz+ImageFileDirectory_v2.write_signed_rationalcCs4||}t||krtd|dt|d|S)Nz&Corrupt EXIF data. Expecting to read  bytes but only got z. )readrOSError)rvfprretr.r.r2 _ensure_reads  z"ImageFileDirectory_v2._ensure_readc Cs|||_zt|d||ddD]}|d||d\}}}}t||jj }t |d}d|d|d |d|d } z |j |\} } Wnt yat| d |Yqw|| } | d kr|} |d |\}| d| d|7} ||t|| }|| n|d| }t|| krtd| dt|d|t| q|st| q||j|<||j|<| d| dkrd| nt|7} t| q|d ||d \|_WdSty} ztt| WYd} ~ dSd} ~ ww)Nr-rrHHL4sr7unknownztag:  ( ) - type: )z - unsupported type rr6z Tag Location: z - Data Location: z/Possibly corrupt EXIF data. Expecting to read r]z. Skipping tag - value: r>)rtellrrangerrbr rrrrgetrKeyErrorloggerdebugseekr _safe_readrrrrrrrr_r)rvr`irrcountrtagnametypnamemsg unit_sizerrhereoffsetr.r.r2loadsd              zImageFileDirectory_v2.loadrc Cs|dt|j}g}|t|t|jdd}d}t|jD]\}}|tkr/t|}|j|}t d|d|dt ||t j koNt |t}|ry|jdkrYd} nd } t| |d } |j|} | D]\} } | | | <qj| |}nt |tr|n|f} |j||g| R}t ||jj}|rd nt|d }d |d|d|d|d }|dt|dkrdt|nt| 7}t ||rd}n|t jt jt jfvrt|}nt| }t|dkr|||||dddfq#|||||d||f|t|ddd7}q#|dur<||\}}}}}|r%td|d|d|d|}|||||f||<|D]*\}}}}}t |d|d|dt |dt | ||d||||7}q>|d7}|D]\}}}}}||7}t|d@r|d7}qo|S)Nr-r7rzTag z, Type: z , Value: rsII*sMM*)rifdrdzsave: rerfrgrhr9rirr:r%r6rz&multistrip support not yet implementedrrrcs) rrrsortedr STRIPOFFSETSrrlrnrorr rrtrrrtobytesrrrrrrrrrrappendljustNotImplementedErrorr)rvryresultentries stripoffsetsrrwrr rr{r ifd_tag ifd_valuerrtrurvrsr.r.r2r~6sj           .zImageFileDirectory_v2.tobytescCsN|dkr||j|ddd|}||}|||t|S)NrHL*r#)rjwriterrr~r)rvr`ryrr.r.r2saves    zImageFileDirectory_v2.save)rNNr)rG)2rrrrrxrr\ryrsetterrrrrrrrrr rrrrr r,listmapr rr SIGNED_BYTErrFLOATrIFDr6r9r=r>rQrVrWrXrZr\rbrzr~rr.r.r.r2rsz <      P                    7 Lrrrrwrite_cseZdZUdZfddZeddZeddZee d< e dd Z d d Z d d Z ddZddZddZddZZS)ImageFileDirectory_v1aThis class represents the **legacy** interface to a TIFF tag directory. Exposes a dictionary interface of the tags in the directory:: ifd = ImageFileDirectory_v1() ifd[key] = 'Some Data' ifd.tagtype[key] = TiffTags.ASCII print(ifd[key]) ('Some Data',) Also contains a dictionary of tag types as read from the tiff image file, :attr:`~PIL.TiffImagePlugin.ImageFileDirectory_v1.tagtype`. 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