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ImageFeatrueExtraction


			
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  <h1>Source code for image_features_extraction.my_iterator</h1><div class="highlight"><pre>
<span></span><span class="kn">from</span> <span class="nn">abc</span> <span class="k">import</span> <span class="n">ABCMeta</span><span class="p">,</span> <span class="n">abstractmethod</span>


<span class="k">class</span> <span class="nc">my_iterator</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    abstract class used to implement a collection class</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">__metaclass__</span> <span class="o">=</span> <span class="n">ABCMeta</span>

    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">current</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__count</span> <span class="o">=</span> <span class="mi">0</span>


    <span class="k">def</span> <span class="nf">item</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        item has to be inplemented in the main class</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">pass</span>


    <span class="k">def</span> <span class="nf">count_update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">count</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__count</span> <span class="o">=</span> <span class="n">count</span>
        <span class="k">return</span> <span class="n">count</span>


    <span class="k">def</span> <span class="nf">count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        returns the number of items</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__count</span>


    <span class="k">def</span> <span class="nf">__iter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Python method to define and call the iterator</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">return</span> <span class="bp">self</span>


    <span class="c1"># used to define the iterator: next element</span>
    <span class="k">def</span> <span class="nf">__next__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Python method to calls the iterator next element</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">current</span> <span class="o">+=</span> <span class="mi">1</span>
        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">current</span> <span class="o">&gt;=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__count</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">current</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
            <span class="k">raise</span> <span class="ne">StopIteration</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">item</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">current</span><span class="p">)</span>
</pre></div>

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