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  <h1>Source code for macop.callbacks.UCBCheckpoint</h1><div class="highlight"><pre>
<span></span><span class="sd">&quot;&quot;&quot;UCB policy Checkpoint class implementation</span>
<span class="sd">&quot;&quot;&quot;</span>

<span class="c1"># main imports</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">pkgutil</span>

<span class="c1"># module imports</span>
<span class="kn">from</span> <span class="nn">.Callback</span> <span class="kn">import</span> <span class="n">Callback</span>
<span class="kn">from</span> <span class="nn">..utils.color</span> <span class="kn">import</span> <span class="n">macop_text</span><span class="p">,</span> <span class="n">macop_line</span>


<div class="viewcode-block" id="UCBCheckpoint"><a class="viewcode-back" href="../../../macop/macop.callbacks.UCBCheckpoint.html#macop.callbacks.UCBCheckpoint.UCBCheckpoint">[docs]</a><span class="k">class</span> <span class="nc">UCBCheckpoint</span><span class="p">(</span><span class="n">Callback</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    UCB checkpoint is used for loading previous UCB data and start again after loading checkpoint</span>
<span class="sd">    Need to be the same operators used during previous run</span>

<span class="sd">    Attributes:</span>
<span class="sd">        algo: {Algorithm} -- main algorithm instance reference</span>
<span class="sd">        every: {int} -- checkpoint frequency used (based on number of evaluations)</span>
<span class="sd">        filepath: {str} -- file path where checkpoints will be saved</span>
<span class="sd">    &quot;&quot;&quot;</span>
<div class="viewcode-block" id="UCBCheckpoint.run"><a class="viewcode-back" href="../../../macop/macop.callbacks.UCBCheckpoint.html#macop.callbacks.UCBCheckpoint.UCBCheckpoint.run">[docs]</a>    <span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Check if necessary to do backup based on `every` variable</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="c1"># get current population</span>
        <span class="n">currentEvaluation</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">getGlobalEvaluation</span><span class="p">()</span>

        <span class="c1"># backup if necessary</span>
        <span class="k">if</span> <span class="n">currentEvaluation</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">_every</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>

            <span class="n">logging</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;UCB Checkpoint is done into &quot;</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">_filepath</span><span class="p">)</span>

            <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_filepath</span><span class="p">,</span> <span class="s1">&#39;w&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>

                <span class="n">rewardsLine</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span>

                <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">r</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_rewards</span><span class="p">):</span>
                    <span class="n">rewardsLine</span> <span class="o">+=</span> <span class="nb">str</span><span class="p">(</span><span class="n">r</span><span class="p">)</span>

                    <span class="k">if</span> <span class="n">i</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_rewards</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">:</span>
                        <span class="n">rewardsLine</span> <span class="o">+=</span> <span class="s1">&#39;;&#39;</span>

                <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">rewardsLine</span> <span class="o">+</span> <span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">)</span>

                <span class="n">occurrencesLine</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span>

                <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">o</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_occurrences</span><span class="p">):</span>
                    <span class="n">occurrencesLine</span> <span class="o">+=</span> <span class="nb">str</span><span class="p">(</span><span class="n">o</span><span class="p">)</span>

                    <span class="k">if</span> <span class="n">i</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_occurrences</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">:</span>
                        <span class="n">occurrencesLine</span> <span class="o">+=</span> <span class="s1">&#39;;&#39;</span>

                <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">occurrencesLine</span> <span class="o">+</span> <span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">)</span></div>

<div class="viewcode-block" id="UCBCheckpoint.load"><a class="viewcode-back" href="../../../macop/macop.callbacks.UCBCheckpoint.html#macop.callbacks.UCBCheckpoint.UCBCheckpoint.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="sd">&quot;&quot;&quot;</span>
<span class="sd">        Load backup lines as rewards and occurrences for UCB</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_filepath</span><span class="p">):</span>

            <span class="n">logging</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Load UCB data&#39;</span><span class="p">)</span>
            <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_filepath</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>

                <span class="n">lines</span> <span class="o">=</span> <span class="n">f</span><span class="o">.</span><span class="n">readlines</span><span class="p">()</span>
                <span class="c1"># read data for each line</span>
                <span class="n">rewardsLine</span> <span class="o">=</span> <span class="n">lines</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
                <span class="n">occurrencesLine</span> <span class="o">=</span> <span class="n">lines</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>

                <span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_rewards</span> <span class="o">=</span> <span class="p">[</span>
                    <span class="nb">float</span><span class="p">(</span><span class="n">f</span><span class="p">)</span> <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">rewardsLine</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;;&#39;</span><span class="p">)</span>
                <span class="p">]</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">_algo</span><span class="o">.</span><span class="n">_policy</span><span class="o">.</span><span class="n">_occurrences</span> <span class="o">=</span> <span class="p">[</span>
                    <span class="nb">float</span><span class="p">(</span><span class="n">f</span><span class="p">)</span> <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">occurrencesLine</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;;&#39;</span><span class="p">)</span>
                <span class="p">]</span>

            <span class="nb">print</span><span class="p">(</span>
                <span class="n">macop_text</span><span class="p">(</span><span class="sa">f</span><span class="s1">&#39;Load of available UCB policy data from `</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">_filepath</span><span class="si">}</span><span class="s1">`&#39;</span><span class="p">))</span>

        <span class="k">else</span><span class="p">:</span>
            <span class="nb">print</span><span class="p">(</span><span class="n">macop_text</span><span class="p">(</span><span class="s1">&#39;No UCB data found, use default UCB policy&#39;</span><span class="p">))</span>
            <span class="n">logging</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;No UCB data found...&quot;</span><span class="p">)</span>

        <span class="nb">print</span><span class="p">(</span><span class="n">macop_line</span><span class="p">())</span></div></div>
</pre></div>

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