RandomSplitCrossover.html 11 KB

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  68. <h1>Source code for macop.operators.crossovers.RandomSplitCrossover</h1><div class="highlight"><pre>
  69. <span></span><span class="sd">&quot;&quot;&quot;Crossover implementation which generated new solution by randomly splitting best solution and current solution</span>
  70. <span class="sd">&quot;&quot;&quot;</span>
  71. <span class="c1"># main imports</span>
  72. <span class="kn">import</span> <span class="nn">random</span>
  73. <span class="kn">import</span> <span class="nn">sys</span>
  74. <span class="kn">import</span> <span class="nn">pkgutil</span>
  75. <span class="c1"># module imports</span>
  76. <span class="kn">from</span> <span class="nn">.Crossover</span> <span class="kn">import</span> <span class="n">Crossover</span>
  77. <span class="kn">from</span> <span class="nn">...utils.modules</span> <span class="kn">import</span> <span class="n">load_class</span>
  78. <div class="viewcode-block" id="RandomSplitCrossover"><a class="viewcode-back" href="../../../../macop/macop.operators.crossovers.RandomSplitCrossover.html#macop.operators.crossovers.RandomSplitCrossover.RandomSplitCrossover">[docs]</a><span class="k">class</span> <span class="nc">RandomSplitCrossover</span><span class="p">(</span><span class="n">Crossover</span><span class="p">):</span>
  79. <span class="sd">&quot;&quot;&quot;Crossover implementation which generated new solution by randomly splitting best solution and current solution</span>
  80. <span class="sd"> Attributes:</span>
  81. <span class="sd"> kind: {KindOperator} -- specify the kind of operator</span>
  82. <span class="sd"> &quot;&quot;&quot;</span>
  83. <div class="viewcode-block" id="RandomSplitCrossover.apply"><a class="viewcode-back" href="../../../../macop/macop.operators.crossovers.RandomSplitCrossover.html#macop.operators.crossovers.RandomSplitCrossover.RandomSplitCrossover.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">solution</span><span class="p">):</span>
  84. <span class="sd">&quot;&quot;&quot;Create new solution based on best solution found and solution passed as parameter</span>
  85. <span class="sd"> Args:</span>
  86. <span class="sd"> solution: {Solution} -- the solution to use for generating new solution</span>
  87. <span class="sd"> Returns:</span>
  88. <span class="sd"> {Solution} -- new generated solution</span>
  89. <span class="sd"> &quot;&quot;&quot;</span>
  90. <span class="n">size</span> <span class="o">=</span> <span class="n">solution</span><span class="o">.</span><span class="n">_size</span>
  91. <span class="c1"># copy data of solution</span>
  92. <span class="n">firstData</span> <span class="o">=</span> <span class="n">solution</span><span class="o">.</span><span class="n">_data</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
  93. <span class="c1"># get best solution from current algorithm</span>
  94. <span class="n">secondData</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_bestSolution</span><span class="o">.</span><span class="n">_data</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
  95. <span class="n">splitIndex</span> <span class="o">=</span> <span class="n">random</span><span class="o">.</span><span class="n">randint</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">secondData</span><span class="p">))</span>
  96. <span class="k">if</span> <span class="n">random</span><span class="o">.</span><span class="n">uniform</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> <span class="o">&gt;</span> <span class="mf">0.5</span><span class="p">:</span>
  97. <span class="n">firstData</span><span class="p">[</span><span class="n">splitIndex</span><span class="p">:(</span><span class="n">size</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)]</span> <span class="o">=</span> <span class="n">firstData</span><span class="p">[</span><span class="n">splitIndex</span><span class="p">:(</span><span class="n">size</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)]</span>
  98. <span class="n">currentData</span> <span class="o">=</span> <span class="n">firstData</span>
  99. <span class="k">else</span><span class="p">:</span>
  100. <span class="n">secondData</span><span class="p">[</span><span class="n">splitIndex</span><span class="p">:(</span><span class="n">size</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)]</span> <span class="o">=</span> <span class="n">firstData</span><span class="p">[</span><span class="n">splitIndex</span><span class="p">:(</span><span class="n">size</span> <span class="o">-</span>
  101. <span class="mi">1</span><span class="p">)]</span>
  102. <span class="n">currentData</span> <span class="o">=</span> <span class="n">secondData</span>
  103. <span class="c1"># create solution of same kind with new data</span>
  104. <span class="n">class_name</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">solution</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span>
  105. <span class="c1"># dynamically load solution class if unknown</span>
  106. <span class="k">if</span> <span class="n">class_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">:</span>
  107. <span class="n">load_class</span><span class="p">(</span><span class="n">class_name</span><span class="p">,</span> <span class="nb">globals</span><span class="p">())</span>
  108. <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="nb">globals</span><span class="p">()[</span><span class="s1">&#39;macop.solutions.&#39;</span> <span class="o">+</span> <span class="n">class_name</span><span class="p">],</span>
  109. <span class="n">class_name</span><span class="p">)(</span><span class="n">currentData</span><span class="p">,</span> <span class="n">size</span><span class="p">)</span></div></div>
  110. </pre></div>
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