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<h1>Source code for PIL.IptcImagePlugin</h1><div class="highlight"><pre>
<span></span><span class="c1">#</span>
<span class="c1"># The Python Imaging Library.</span>
<span class="c1"># $Id$</span>
<span class="c1">#</span>
<span class="c1"># IPTC/NAA file handling</span>
<span class="c1">#</span>
<span class="c1"># history:</span>
<span class="c1"># 1995-10-01 fl Created</span>
<span class="c1"># 1998-03-09 fl Cleaned up and added to PIL</span>
<span class="c1"># 2002-06-18 fl Added getiptcinfo helper</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) Secret Labs AB 1997-2002.</span>
<span class="c1"># Copyright (c) Fredrik Lundh 1995.</span>
<span class="c1">#</span>
<span class="c1"># See the README file for information on usage and redistribution.</span>
<span class="c1">#</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">print_function</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">Image</span><span class="p">,</span> <span class="n">ImageFile</span>
<span class="kn">from</span> <span class="nn">._binary</span> <span class="k">import</span> <span class="n">i8</span><span class="p">,</span> <span class="n">i16be</span> <span class="k">as</span> <span class="n">i16</span><span class="p">,</span> <span class="n">i32be</span> <span class="k">as</span> <span class="n">i32</span><span class="p">,</span> <span class="n">o8</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">tempfile</span>
<span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.3"</span>
<span class="n">COMPRESSION</span> <span class="o">=</span> <span class="p">{</span>
<span class="mi">1</span><span class="p">:</span> <span class="s2">"raw"</span><span class="p">,</span>
<span class="mi">5</span><span class="p">:</span> <span class="s2">"jpeg"</span>
<span class="p">}</span>
<span class="n">PAD</span> <span class="o">=</span> <span class="n">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="o">*</span> <span class="mi">4</span>
<span class="c1">#</span>
<span class="c1"># Helpers</span>
<div class="viewcode-block" id="i"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.i">[docs]</a><span class="k">def</span> <span class="nf">i</span><span class="p">(</span><span class="n">c</span><span class="p">):</span>
<span class="k">return</span> <span class="n">i32</span><span class="p">((</span><span class="n">PAD</span> <span class="o">+</span> <span class="n">c</span><span class="p">)[</span><span class="o">-</span><span class="mi">4</span><span class="p">:])</span></div>
<div class="viewcode-block" id="dump"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.dump">[docs]</a><span class="k">def</span> <span class="nf">dump</span><span class="p">(</span><span class="n">c</span><span class="p">):</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">c</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s2">"</span><span class="si">%02x</span><span class="s2">"</span> <span class="o">%</span> <span class="n">i8</span><span class="p">(</span><span class="n">i</span><span class="p">),</span> <span class="n">end</span><span class="o">=</span><span class="s1">' '</span><span class="p">)</span>
<span class="nb">print</span><span class="p">()</span></div>
<span class="c1">##</span>
<span class="c1"># Image plugin for IPTC/NAA datastreams. To read IPTC/NAA fields</span>
<span class="c1"># from TIFF and JPEG files, use the <b>getiptcinfo</b> function.</span>
<div class="viewcode-block" id="IptcImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.IptcImageFile">[docs]</a><span class="k">class</span> <span class="nc">IptcImageFile</span><span class="p">(</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">ImageFile</span><span class="p">):</span>
<span class="nb">format</span> <span class="o">=</span> <span class="s2">"IPTC"</span>
<span class="n">format_description</span> <span class="o">=</span> <span class="s2">"IPTC/NAA"</span>
<div class="viewcode-block" id="IptcImageFile.getint"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.IptcImageFile.getint">[docs]</a> <span class="k">def</span> <span class="nf">getint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
<span class="k">return</span> <span class="n">i</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">key</span><span class="p">])</span></div>
<div class="viewcode-block" id="IptcImageFile.field"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.IptcImageFile.field">[docs]</a> <span class="k">def</span> <span class="nf">field</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1">#</span>
<span class="c1"># get a IPTC field header</span>
<span class="n">s</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">5</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">len</span><span class="p">(</span><span class="n">s</span><span class="p">):</span>
<span class="k">return</span> <span class="kc">None</span><span class="p">,</span> <span class="mi">0</span>
<span class="n">tag</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">1</span><span class="p">]),</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">2</span><span class="p">])</span>
<span class="c1"># syntax</span>
<span class="k">if</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">!=</span> <span class="mh">0x1C</span> <span class="ow">or</span> <span class="n">tag</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><</span> <span class="mi">1</span> <span class="ow">or</span> <span class="n">tag</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">></span> <span class="mi">9</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"invalid IPTC/NAA file"</span><span class="p">)</span>
<span class="c1"># field size</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">3</span><span class="p">])</span>
<span class="k">if</span> <span class="n">size</span> <span class="o">></span> <span class="mi">132</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"illegal field length in IPTC/NAA file"</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">size</span> <span class="o">==</span> <span class="mi">128</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">elif</span> <span class="n">size</span> <span class="o">></span> <span class="mi">128</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">size</span><span class="o">-</span><span class="mi">128</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">3</span><span class="p">:])</span>
<span class="k">return</span> <span class="n">tag</span><span class="p">,</span> <span class="n">size</span></div>
<span class="k">def</span> <span class="nf">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># load descriptive fields</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="n">offset</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span>
<span class="n">tag</span><span class="p">,</span> <span class="n">size</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">tag</span> <span class="ow">or</span> <span class="n">tag</span> <span class="o">==</span> <span class="p">(</span><span class="mi">8</span><span class="p">,</span> <span class="mi">10</span><span class="p">):</span>
<span class="k">break</span>
<span class="k">if</span> <span class="n">size</span><span class="p">:</span>
<span class="n">tagdata</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">tagdata</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">tag</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">tag</span><span class="p">],</span> <span class="nb">list</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">tag</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">tagdata</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">tag</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">tag</span><span class="p">],</span> <span class="n">tagdata</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">tag</span><span class="p">]</span> <span class="o">=</span> <span class="n">tagdata</span>
<span class="c1"># mode</span>
<span class="n">layers</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">60</span><span class="p">)][</span><span class="mi">0</span><span class="p">])</span>
<span class="n">component</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">60</span><span class="p">)][</span><span class="mi">1</span><span class="p">])</span>
<span class="k">if</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">65</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">:</span>
<span class="nb">id</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">65</span><span class="p">)][</span><span class="mi">0</span><span class="p">])</span><span class="o">-</span><span class="mi">1</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">id</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">layers</span> <span class="o">==</span> <span class="mi">1</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">component</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"L"</span>
<span class="k">elif</span> <span class="n">layers</span> <span class="o">==</span> <span class="mi">3</span> <span class="ow">and</span> <span class="n">component</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"RGB"</span><span class="p">[</span><span class="nb">id</span><span class="p">]</span>
<span class="k">elif</span> <span class="n">layers</span> <span class="o">==</span> <span class="mi">4</span> <span class="ow">and</span> <span class="n">component</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"CMYK"</span><span class="p">[</span><span class="nb">id</span><span class="p">]</span>
<span class="c1"># size</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">getint</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">20</span><span class="p">)),</span> <span class="bp">self</span><span class="o">.</span><span class="n">getint</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">30</span><span class="p">))</span>
<span class="c1"># compression</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">compression</span> <span class="o">=</span> <span class="n">COMPRESSION</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">getint</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">120</span><span class="p">))]</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"Unknown IPTC image compression"</span><span class="p">)</span>
<span class="c1"># tile</span>
<span class="k">if</span> <span class="n">tag</span> <span class="o">==</span> <span class="p">(</span><span class="mi">8</span><span class="p">,</span> <span class="mi">10</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"iptc"</span><span class="p">,</span> <span class="p">(</span><span class="n">compression</span><span class="p">,</span> <span class="n">offset</span><span class="p">),</span>
<span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]))]</span>
<div class="viewcode-block" id="IptcImageFile.load"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.IptcImageFile.load">[docs]</a> <span class="k">def</span> <span class="nf">load</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">tile</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">tile</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="s2">"iptc"</span><span class="p">:</span>
<span class="k">return</span> <span class="n">ImageFile</span><span class="o">.</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="nb">type</span><span class="p">,</span> <span class="n">tile</span><span class="p">,</span> <span class="n">box</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tile</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">encoding</span><span class="p">,</span> <span class="n">offset</span> <span class="o">=</span> <span class="n">tile</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">offset</span><span class="p">)</span>
<span class="c1"># Copy image data to temporary file</span>
<span class="n">o_fd</span><span class="p">,</span> <span class="n">outfile</span> <span class="o">=</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">mkstemp</span><span class="p">(</span><span class="n">text</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="n">o</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fdopen</span><span class="p">(</span><span class="n">o_fd</span><span class="p">)</span>
<span class="k">if</span> <span class="n">encoding</span> <span class="o">==</span> <span class="s2">"raw"</span><span class="p">:</span>
<span class="c1"># To simplify access to the extracted file,</span>
<span class="c1"># prepend a PPM header</span>
<span class="n">o</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s2">"P5</span><span class="se">\n</span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="se">\n</span><span class="s2">255</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">)</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="nb">type</span><span class="p">,</span> <span class="n">size</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">type</span> <span class="o">!=</span> <span class="p">(</span><span class="mi">8</span><span class="p">,</span> <span class="mi">10</span><span class="p">):</span>
<span class="k">break</span>
<span class="k">while</span> <span class="n">size</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="n">s</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="nb">min</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="mi">8192</span><span class="p">))</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">s</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">o</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="n">size</span> <span class="o">-=</span> <span class="nb">len</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="n">o</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">_im</span> <span class="o">=</span> <span class="n">Image</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">outfile</span><span class="p">)</span>
<span class="n">_im</span><span class="o">.</span><span class="n">load</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">im</span> <span class="o">=</span> <span class="n">_im</span><span class="o">.</span><span class="n">im</span>
<span class="k">finally</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">unlink</span><span class="p">(</span><span class="n">outfile</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span></div></div>
<span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">IptcImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">IptcImageFile</span><span class="p">)</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_extension</span><span class="p">(</span><span class="n">IptcImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".iim"</span><span class="p">)</span>
<div class="viewcode-block" id="getiptcinfo"><a class="viewcode-back" href="../../reference/plugins.html#PIL.IptcImagePlugin.getiptcinfo">[docs]</a><span class="k">def</span> <span class="nf">getiptcinfo</span><span class="p">(</span><span class="n">im</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Get IPTC information from TIFF, JPEG, or IPTC file.</span>
<span class="sd"> :param im: An image containing IPTC data.</span>
<span class="sd"> :returns: A dictionary containing IPTC information, or None if</span>
<span class="sd"> no IPTC information block was found.</span>
<span class="sd"> """</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">TiffImagePlugin</span><span class="p">,</span> <span class="n">JpegImagePlugin</span>
<span class="kn">import</span> <span class="nn">io</span>
<span class="n">data</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">IptcImageFile</span><span class="p">):</span>
<span class="c1"># return info dictionary right away</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">JpegImagePlugin</span><span class="o">.</span><span class="n">JpegImageFile</span><span class="p">):</span>
<span class="c1"># extract the IPTC/NAA resource</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">app</span><span class="p">[</span><span class="s2">"APP13"</span><span class="p">]</span>
<span class="k">if</span> <span class="n">app</span><span class="p">[:</span><span class="mi">14</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"Photoshop 3.0</span><span class="se">\x00</span><span class="s2">"</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">app</span><span class="p">[</span><span class="mi">14</span><span class="p">:]</span>
<span class="c1"># parse the image resource block</span>
<span class="n">offset</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">while</span> <span class="n">app</span><span class="p">[</span><span class="n">offset</span><span class="p">:</span><span class="n">offset</span><span class="o">+</span><span class="mi">4</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"8BIM"</span><span class="p">:</span>
<span class="n">offset</span> <span class="o">+=</span> <span class="mi">4</span>
<span class="c1"># resource code</span>
<span class="n">code</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">app</span><span class="p">,</span> <span class="n">offset</span><span class="p">)</span>
<span class="n">offset</span> <span class="o">+=</span> <span class="mi">2</span>
<span class="c1"># resource name (usually empty)</span>
<span class="n">name_len</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">app</span><span class="p">[</span><span class="n">offset</span><span class="p">])</span>
<span class="c1"># name = app[offset+1:offset+1+name_len]</span>
<span class="n">offset</span> <span class="o">=</span> <span class="mi">1</span> <span class="o">+</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">name_len</span>
<span class="k">if</span> <span class="n">offset</span> <span class="o">&</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">offset</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="c1"># resource data block</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">app</span><span class="p">,</span> <span class="n">offset</span><span class="p">)</span>
<span class="n">offset</span> <span class="o">+=</span> <span class="mi">4</span>
<span class="k">if</span> <span class="n">code</span> <span class="o">==</span> <span class="mh">0x0404</span><span class="p">:</span>
<span class="c1"># 0x0404 contains IPTC/NAA data</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">app</span><span class="p">[</span><span class="n">offset</span><span class="p">:</span><span class="n">offset</span><span class="o">+</span><span class="n">size</span><span class="p">]</span>
<span class="k">break</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">size</span>
<span class="k">if</span> <span class="n">offset</span> <span class="o">&</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">offset</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">AttributeError</span><span class="p">,</span> <span class="ne">KeyError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">TiffImagePlugin</span><span class="o">.</span><span class="n">TiffImageFile</span><span class="p">):</span>
<span class="c1"># get raw data from the IPTC/NAA tag (PhotoShop tags the data</span>
<span class="c1"># as 4-byte integers, so we cannot use the get method...)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">tag</span><span class="o">.</span><span class="n">tagdata</span><span class="p">[</span><span class="n">TiffImagePlugin</span><span class="o">.</span><span class="n">IPTC_NAA_CHUNK</span><span class="p">]</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">AttributeError</span><span class="p">,</span> <span class="ne">KeyError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span> <span class="c1"># no properties</span>
<span class="c1"># create an IptcImagePlugin object without initializing it</span>
<span class="k">class</span> <span class="nc">FakeImage</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">pass</span>
<span class="n">im</span> <span class="o">=</span> <span class="n">FakeImage</span><span class="p">()</span>
<span class="n">im</span><span class="o">.</span><span class="vm">__class__</span> <span class="o">=</span> <span class="n">IptcImageFile</span>
<span class="c1"># parse the IPTC information chunk</span>
<span class="n">im</span><span class="o">.</span><span class="n">info</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">im</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="n">io</span><span class="o">.</span><span class="n">BytesIO</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">im</span><span class="o">.</span><span class="n">_open</span><span class="p">()</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">IndexError</span><span class="p">,</span> <span class="ne">KeyError</span><span class="p">):</span>
<span class="k">pass</span> <span class="c1"># expected failure</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span></div>
</pre></div>
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