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<div class="highlight"><pre><span class="lineno">3</span><span></span><span class="kn">import</span> <span class="nn">torch.nn</span> <span class="k">as</span> <span class="nn">nn</span>
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<span class="lineno">4</span><span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
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<span class="lineno">5</span><span class="kn">import</span> <span class="nn">os</span>
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<span class="lineno">6</span><span class="kn">from</span> <span class="nn">models.cnn</span> <span class="kn">import</span> <span class="n">GetCNN</span>
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<span class="lineno">7</span><span class="kn">from</span> <span class="nn">ray</span> <span class="kn">import</span> <span class="n">tune</span>
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<span class="lineno">8</span><span class="kn">from</span> <span class="nn">utils.dataloader</span> <span class="kn">import</span> <span class="o">*</span> <span class="c1"># Get the transforms</span></pre></div>
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<div class='section' id='section-1'>
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<div class='docs'>
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<a href='#section-1'>#</a>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">11</span><span class="k">class</span> <span class="nc">Trainer</span><span class="p">():</span></pre></div>
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<div class='section' id='section-2'>
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<div class='docs'>
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<a href='#section-2'>#</a>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">12</span> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="s2">"default"</span><span class="p">,</span> <span class="n">device</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
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<span class="lineno">13</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span> <span class="o">=</span> <span class="n">device</span>
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<span class="lineno">14</span>
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<span class="lineno">15</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="lineno">16</span> <span class="bp">self</span><span class="o">.</span><span class="n">start_epoch</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="lineno">17</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="n">name</span></pre></div>
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</div>
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<div class='section' id='section-3'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-3'>#</a>
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</div>
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<p>Train function</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">20</span> <span class="k">def</span> <span class="nf">Train</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">net</span><span class="p">,</span> <span class="n">trainloader</span><span class="p">,</span> <span class="n">testloader</span><span class="p">,</span> <span class="n">cost</span><span class="p">,</span> <span class="n">opt</span><span class="p">,</span> <span class="n">epochs</span> <span class="o">=</span> <span class="mi">25</span><span class="p">):</span>
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<span class="lineno">21</span>
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<span class="lineno">22</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="n">net</span>
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<span class="lineno">23</span> <span class="bp">self</span><span class="o">.</span><span class="n">trainloader</span> <span class="o">=</span> <span class="n">trainloader</span>
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<span class="lineno">24</span> <span class="bp">self</span><span class="o">.</span><span class="n">testloader</span> <span class="o">=</span> <span class="n">testloader</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-4'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-4'>#</a>
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</div>
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<p>Optimizer and Cost function</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">27</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span> <span class="o">=</span> <span class="n">opt</span>
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<span class="lineno">28</span> <span class="bp">self</span><span class="o">.</span><span class="n">cost</span> <span class="o">=</span> <span class="n">cost</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-5'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-5'>#</a>
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</div>
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<p>Bookkeeping</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">31</span> <span class="n">train_loss</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">zeros</span><span class="p">(</span><span class="n">epochs</span><span class="p">)</span>
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<span class="lineno">32</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="lineno">33</span> <span class="n">train_steps</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="lineno">34</span> <span class="n">accuracy</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">zeros</span><span class="p">(</span><span class="n">epochs</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-6'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-6'>#</a>
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</div>
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<p>Training loop</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">37</span> <span class="k">for</span> <span class="n">epoch</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">start_epoch</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">start_epoch</span><span class="o">+</span><span class="n">epochs</span><span class="p">):</span>
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<span class="lineno">38</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span> <span class="o">=</span> <span class="n">epoch</span><span class="o">+</span><span class="mi">1</span>
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<span class="lineno">39</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">train</span><span class="p">()</span> <span class="c1"># Enable Dropout</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-7'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-7'>#</a>
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</div>
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<p>Iterating over train data</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">42</span> <span class="k">for</span> <span class="n">data</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">trainloader</span><span class="p">:</span>
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<span class="lineno">43</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">:</span>
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<span class="lineno">44</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">),</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span>
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<span class="lineno">45</span> <span class="k">else</span><span class="p">:</span>
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<span class="lineno">46</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
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<span class="lineno">47</span>
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<span class="lineno">48</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">zero_grad</span><span class="p">()</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-8'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-8'>#</a>
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</div>
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<p>Forward + backward + optimize</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">51</span> <span class="n">outputs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="p">(</span><span class="n">images</span><span class="p">)</span>
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<span class="lineno">52</span> <span class="n">epoch_loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cost</span><span class="p">(</span><span class="n">outputs</span><span class="p">,</span> <span class="n">labels</span><span class="p">)</span>
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<span class="lineno">53</span> <span class="n">epoch_loss</span><span class="o">.</span><span class="n">backward</span><span class="p">()</span>
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<span class="lineno">54</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">step</span><span class="p">()</span>
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<span class="lineno">55</span> <span class="n">train_steps</span><span class="o">+=</span><span class="mi">1</span>
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<span class="lineno">56</span>
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<span class="lineno">57</span> <span class="n">train_loss</span><span class="p">[</span><span class="n">epoch</span><span class="p">]</span> <span class="o">+=</span> <span class="n">epoch_loss</span><span class="o">.</span><span class="n">item</span><span class="p">()</span>
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<span class="lineno">58</span> <span class="n">loss_train</span> <span class="o">=</span> <span class="n">train_loss</span><span class="p">[</span><span class="n">epoch</span><span class="p">]</span> <span class="o">/</span> <span class="n">train_steps</span>
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<span class="lineno">59</span>
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<span class="lineno">60</span> <span class="n">accuracy</span><span class="p">[</span><span class="n">epoch</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">Test</span><span class="p">()</span> <span class="c1">#correct / total</span>
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<span class="lineno">61</span>
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<span class="lineno">62</span> <span class="nb">print</span><span class="p">(</span><span class="s2">"Epoch </span><span class="si">%d</span><span class="s2"> LR </span><span class="si">%.6f</span><span class="s2"> Train Loss: </span><span class="si">%.3f</span><span class="s2"> Test Accuracy: </span><span class="si">%.3f</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span>
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<span class="lineno">63</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">param_groups</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="s1">'lr'</span><span class="p">],</span> <span class="n">loss_train</span><span class="p">,</span> <span class="n">accuracy</span><span class="p">[</span><span class="n">epoch</span><span class="p">]))</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-9'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-9'>#</a>
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</div>
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<p>Save best model</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">66</span> <span class="k">if</span> <span class="n">accuracy</span><span class="p">[</span><span class="n">epoch</span><span class="p">]</span> <span class="o">>=</span> <span class="n">torch</span><span class="o">.</span><span class="n">max</span><span class="p">(</span><span class="n">accuracy</span><span class="p">):</span>
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<span class="lineno">67</span> <span class="bp">self</span><span class="o">.</span><span class="n">save_best_model</span><span class="p">({</span>
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<span class="lineno">68</span> <span class="s1">'epoch'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span><span class="p">,</span>
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<span class="lineno">69</span> <span class="s1">'state_dict'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">state_dict</span><span class="p">(),</span>
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<span class="lineno">70</span> <span class="s1">'optimizer'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">state_dict</span><span class="p">(),</span>
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<span class="lineno">71</span> <span class="p">})</span>
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<span class="lineno">72</span>
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<span class="lineno">73</span> <span class="bp">self</span><span class="o">.</span><span class="n">plot_accuracy</span><span class="p">(</span><span class="n">accuracy</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-10'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-10'>#</a>
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</div>
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<p>Test over testloader loop</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">76</span> <span class="k">def</span> <span class="nf">Test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">net</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">save</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-11'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-11'>#</a>
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</div>
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<p>Initialize dataloader</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">78</span> <span class="k">if</span> <span class="n">save</span> <span class="o">==</span> <span class="kc">None</span><span class="p">:</span>
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<span class="lineno">79</span> <span class="n">testloader</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">testloader</span>
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<span class="lineno">80</span> <span class="k">else</span><span class="p">:</span>
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<span class="lineno">81</span> <span class="n">testloader</span> <span class="o">=</span> <span class="n">Dataloader_test</span><span class="p">(</span><span class="n">save</span><span class="p">,</span> <span class="n">batch_size</span><span class="o">=</span><span class="mi">128</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-12'>
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<div class='docs'>
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<div class='section-link'>
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|
<a href='#section-12'>#</a>
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</div>
|
|
<p>Initialize net</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">84</span> <span class="k">if</span> <span class="n">net</span> <span class="o">==</span> <span class="kc">None</span><span class="p">:</span>
|
|
<span class="lineno">85</span> <span class="n">net</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-13'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-13'>#</a>
|
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</div>
|
|
<p>Disable Dropout</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">88</span> <span class="n">net</span><span class="o">.</span><span class="n">eval</span><span class="p">()</span></pre></div>
|
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</div>
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|
</div>
|
|
<div class='section' id='section-14'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-14'>#</a>
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</div>
|
|
<p>Bookkeeping</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">91</span> <span class="n">correct</span> <span class="o">=</span> <span class="mf">0.0</span>
|
|
<span class="lineno">92</span> <span class="n">total</span> <span class="o">=</span> <span class="mf">0.0</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-15'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
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|
<a href='#section-15'>#</a>
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</div>
|
|
<p>Infer the model</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">95</span> <span class="k">with</span> <span class="n">torch</span><span class="o">.</span><span class="n">no_grad</span><span class="p">():</span>
|
|
<span class="lineno">96</span> <span class="k">for</span> <span class="n">data</span> <span class="ow">in</span> <span class="n">testloader</span><span class="p">:</span>
|
|
<span class="lineno">97</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">:</span>
|
|
<span class="lineno">98</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">),</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span>
|
|
<span class="lineno">99</span> <span class="k">else</span><span class="p">:</span>
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|
<span class="lineno">100</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
|
|
<span class="lineno">101</span>
|
|
<span class="lineno">102</span> <span class="n">outputs</span> <span class="o">=</span> <span class="n">net</span><span class="p">(</span><span class="n">images</span><span class="p">)</span>
|
|
<span class="lineno">103</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicted</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">max</span><span class="p">(</span><span class="n">outputs</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
|
|
<span class="lineno">104</span> <span class="n">total</span> <span class="o">+=</span> <span class="n">labels</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="lineno">105</span> <span class="n">correct</span> <span class="o">+=</span> <span class="p">(</span><span class="n">predicted</span> <span class="o">==</span> <span class="n">labels</span><span class="p">)</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span><span class="o">.</span><span class="n">item</span><span class="p">()</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-16'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-16'>#</a>
|
|
</div>
|
|
<p>compute the final accuracy</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">108</span> <span class="n">accuracy</span> <span class="o">=</span> <span class="n">correct</span> <span class="o">/</span> <span class="n">total</span>
|
|
<span class="lineno">109</span> <span class="k">return</span> <span class="n">accuracy</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-17'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-17'>#</a>
|
|
</div>
|
|
<p>Train function modified for ray schedulers</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">112</span> <span class="k">def</span> <span class="nf">Train_ray</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">config</span><span class="p">,</span> <span class="n">checkpoint_dir</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">data_dir</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
|
|
<span class="lineno">113</span> <span class="n">epochs</span> <span class="o">=</span> <span class="mi">25</span>
|
|
<span class="lineno">114</span>
|
|
<span class="lineno">115</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="n">GetCNN</span><span class="p">(</span><span class="n">config</span><span class="p">[</span><span class="s2">"l1"</span><span class="p">],</span> <span class="n">config</span><span class="p">[</span><span class="s2">"l2"</span><span class="p">])</span>
|
|
<span class="lineno">116</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span>
|
|
<span class="lineno">117</span>
|
|
<span class="lineno">118</span> <span class="n">trainloader</span><span class="p">,</span> <span class="n">valloader</span> <span class="o">=</span> <span class="n">Dataloader_train_valid</span><span class="p">(</span><span class="n">data_dir</span><span class="p">,</span> <span class="n">batch_size</span><span class="o">=</span><span class="n">config</span><span class="p">[</span><span class="s2">"batch_size"</span><span class="p">])</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-18'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-18'>#</a>
|
|
</div>
|
|
<p>Optimizer and Cost function</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">121</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">optim</span><span class="o">.</span><span class="n">Adam</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">parameters</span><span class="p">(),</span> <span class="n">lr</span><span class="o">=</span><span class="n">config</span><span class="p">[</span><span class="s2">"lr"</span><span class="p">],</span> <span class="n">betas</span><span class="o">=</span><span class="p">(</span><span class="mf">0.9</span><span class="p">,</span> <span class="mf">0.95</span><span class="p">),</span> <span class="n">weight_decay</span><span class="o">=</span><span class="n">config</span><span class="p">[</span><span class="s2">"decay"</span><span class="p">])</span>
|
|
<span class="lineno">122</span> <span class="bp">self</span><span class="o">.</span><span class="n">cost</span> <span class="o">=</span> <span class="n">nn</span><span class="o">.</span><span class="n">CrossEntropyLoss</span><span class="p">()</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-19'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-19'>#</a>
|
|
</div>
|
|
<p>restoring checkpoint</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">125</span> <span class="k">if</span> <span class="n">checkpoint_dir</span><span class="p">:</span>
|
|
<span class="lineno">126</span> <span class="n">checkpoint</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">checkpoint_dir</span><span class="p">,</span> <span class="s2">"checkpoint"</span><span class="p">)</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-20'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-20'>#</a>
|
|
</div>
|
|
<p>checkpoint = checkpoint_dir</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">128</span> <span class="n">model_state</span><span class="p">,</span> <span class="n">optimizer_state</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="n">checkpoint</span><span class="p">)</span>
|
|
<span class="lineno">129</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">load_state_dict</span><span class="p">(</span><span class="n">model_state</span><span class="p">)</span>
|
|
<span class="lineno">130</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">load_state_dict</span><span class="p">(</span><span class="n">optimizer_state</span><span class="p">)</span>
|
|
<span class="lineno">131</span>
|
|
<span class="lineno">132</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">train</span><span class="p">()</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-21'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-21'>#</a>
|
|
</div>
|
|
<p>Record loss/accuracies</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">135</span> <span class="n">train_loss</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">zeros</span><span class="p">(</span><span class="n">epochs</span><span class="p">)</span>
|
|
<span class="lineno">136</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span> <span class="o">=</span> <span class="mi">0</span>
|
|
<span class="lineno">137</span> <span class="n">train_steps</span> <span class="o">=</span> <span class="mi">0</span>
|
|
<span class="lineno">138</span> <span class="k">for</span> <span class="n">epoch</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">start_epoch</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">start_epoch</span><span class="o">+</span><span class="n">epochs</span><span class="p">):</span>
|
|
<span class="lineno">139</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span> <span class="o">=</span> <span class="n">epoch</span><span class="o">+</span><span class="mi">1</span>
|
|
<span class="lineno">140</span>
|
|
<span class="lineno">141</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">train</span><span class="p">()</span> <span class="c1"># Enable Dropout</span>
|
|
<span class="lineno">142</span> <span class="k">for</span> <span class="n">data</span> <span class="ow">in</span> <span class="n">trainloader</span><span class="p">:</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-22'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-22'>#</a>
|
|
</div>
|
|
<p>Get the inputs; data is a list of [inputs, labels]</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">144</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">:</span>
|
|
<span class="lineno">145</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">),</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span>
|
|
<span class="lineno">146</span> <span class="k">else</span><span class="p">:</span>
|
|
<span class="lineno">147</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
|
|
<span class="lineno">148</span>
|
|
<span class="lineno">149</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">zero_grad</span><span class="p">()</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-23'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-23'>#</a>
|
|
</div>
|
|
<p>Forward + backward + optimize</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">151</span> <span class="n">outputs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="p">(</span><span class="n">images</span><span class="p">)</span>
|
|
<span class="lineno">152</span> <span class="n">epoch_loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cost</span><span class="p">(</span><span class="n">outputs</span><span class="p">,</span> <span class="n">labels</span><span class="p">)</span>
|
|
<span class="lineno">153</span> <span class="n">epoch_loss</span><span class="o">.</span><span class="n">backward</span><span class="p">()</span>
|
|
<span class="lineno">154</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">step</span><span class="p">()</span>
|
|
<span class="lineno">155</span> <span class="n">train_steps</span><span class="o">+=</span><span class="mi">1</span>
|
|
<span class="lineno">156</span>
|
|
<span class="lineno">157</span> <span class="n">train_loss</span><span class="p">[</span><span class="n">epoch</span><span class="p">]</span> <span class="o">+=</span> <span class="n">epoch_loss</span><span class="o">.</span><span class="n">item</span><span class="p">()</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-24'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-24'>#</a>
|
|
</div>
|
|
<p>Validation loss</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">160</span> <span class="n">val_loss</span> <span class="o">=</span> <span class="mf">0.0</span>
|
|
<span class="lineno">161</span> <span class="n">val_steps</span> <span class="o">=</span> <span class="mi">0</span>
|
|
<span class="lineno">162</span> <span class="n">total</span> <span class="o">=</span> <span class="mi">0</span>
|
|
<span class="lineno">163</span> <span class="n">correct</span> <span class="o">=</span> <span class="mi">0</span>
|
|
<span class="lineno">164</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">eval</span><span class="p">()</span>
|
|
<span class="lineno">165</span> <span class="k">for</span> <span class="n">data</span> <span class="ow">in</span> <span class="n">valloader</span><span class="p">:</span>
|
|
<span class="lineno">166</span> <span class="k">with</span> <span class="n">torch</span><span class="o">.</span><span class="n">no_grad</span><span class="p">():</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-25'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-25'>#</a>
|
|
</div>
|
|
<p>Get the inputs; data is a list of [inputs, labels]</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">168</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">:</span>
|
|
<span class="lineno">169</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">),</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span>
|
|
<span class="lineno">170</span> <span class="k">else</span><span class="p">:</span>
|
|
<span class="lineno">171</span> <span class="n">images</span><span class="p">,</span> <span class="n">labels</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class='section' id='section-26'>
|
|
<div class='docs'>
|
|
<div class='section-link'>
|
|
<a href='#section-26'>#</a>
|
|
</div>
|
|
<p>Forward + backward + optimize</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre><span class="lineno">174</span> <span class="n">outputs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="p">(</span><span class="n">images</span><span class="p">)</span>
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<span class="lineno">175</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicted</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">max</span><span class="p">(</span><span class="n">outputs</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
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<span class="lineno">176</span> <span class="n">total</span> <span class="o">+=</span> <span class="n">labels</span><span class="o">.</span><span class="n">size</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
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<span class="lineno">177</span> <span class="n">correct</span> <span class="o">+=</span> <span class="p">(</span><span class="n">predicted</span> <span class="o">==</span> <span class="n">labels</span><span class="p">)</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span><span class="o">.</span><span class="n">item</span><span class="p">()</span>
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<span class="lineno">178</span>
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<span class="lineno">179</span> <span class="n">loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cost</span><span class="p">(</span><span class="n">outputs</span><span class="p">,</span> <span class="n">labels</span><span class="p">)</span>
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<span class="lineno">180</span> <span class="n">val_loss</span> <span class="o">+=</span> <span class="n">loss</span><span class="o">.</span><span class="n">cpu</span><span class="p">()</span><span class="o">.</span><span class="n">numpy</span><span class="p">()</span>
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<span class="lineno">181</span> <span class="n">val_steps</span> <span class="o">+=</span> <span class="mi">1</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-27'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-27'>#</a>
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</div>
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<p>Save checkpoints</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">184</span> <span class="k">with</span> <span class="n">tune</span><span class="o">.</span><span class="n">checkpoint_dir</span><span class="p">(</span><span class="n">step</span><span class="o">=</span><span class="n">epoch</span><span class="p">)</span> <span class="k">as</span> <span class="n">checkpoint_dir</span><span class="p">:</span>
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<span class="lineno">185</span> <span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">checkpoint_dir</span><span class="p">,</span> <span class="s2">"checkpoint"</span><span class="p">)</span>
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<span class="lineno">186</span> <span class="n">torch</span><span class="o">.</span><span class="n">save</span><span class="p">(</span>
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<span class="lineno">187</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">state_dict</span><span class="p">(),</span> <span class="bp">self</span><span class="o">.</span><span class="n">opt</span><span class="o">.</span><span class="n">state_dict</span><span class="p">()),</span> <span class="n">path</span><span class="p">)</span>
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<span class="lineno">188</span>
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<span class="lineno">189</span> <span class="n">tune</span><span class="o">.</span><span class="n">report</span><span class="p">(</span><span class="n">loss</span><span class="o">=</span><span class="p">(</span><span class="n">val_loss</span> <span class="o">/</span> <span class="n">val_steps</span><span class="p">),</span> <span class="n">accuracy</span><span class="o">=</span><span class="n">correct</span> <span class="o">/</span> <span class="n">total</span><span class="p">)</span>
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<span class="lineno">190</span>
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<span class="lineno">191</span> <span class="k">return</span> <span class="n">train_loss</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-28'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-28'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">193</span> <span class="k">def</span> <span class="nf">plot_accuracy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">accuracy</span><span class="p">,</span> <span class="n">criterea</span> <span class="o">=</span> <span class="s2">"accuracy"</span><span class="p">):</span>
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<span class="lineno">194</span> <span class="n">plt</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">accuracy</span><span class="o">.</span><span class="n">numpy</span><span class="p">())</span>
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<span class="lineno">195</span> <span class="n">plt</span><span class="o">.</span><span class="n">ylabel</span><span class="p">(</span><span class="s2">"Accuracy"</span> <span class="k">if</span> <span class="n">criterea</span> <span class="o">==</span> <span class="s2">"accuracy"</span> <span class="k">else</span> <span class="s2">"Loss"</span><span class="p">)</span>
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<span class="lineno">196</span> <span class="n">plt</span><span class="o">.</span><span class="n">xlabel</span><span class="p">(</span><span class="s2">"Epochs"</span><span class="p">)</span>
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<span class="lineno">197</span> <span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-29'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-29'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">200</span> <span class="k">def</span> <span class="nf">save_checkpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">state</span><span class="p">):</span>
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<span class="lineno">201</span> <span class="n">directory</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="s2">"./save/</span><span class="si">%s</span><span class="s2">-checkpoints/"</span><span class="o">%</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">))</span>
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<span class="lineno">202</span> <span class="k">if</span> <span class="ow">not</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="n">directory</span><span class="p">):</span>
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<span class="lineno">203</span> <span class="n">os</span><span class="o">.</span><span class="n">mkdir</span><span class="p">(</span><span class="n">directory</span><span class="p">)</span>
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<span class="lineno">204</span> <span class="n">torch</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">state</span><span class="p">,</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">/model_epoch_</span><span class="si">%s</span><span class="s2">.pt"</span> <span class="o">%</span><span class="p">(</span><span class="n">directory</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">epoch</span><span class="p">))</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-30'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-30'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">206</span> <span class="k">def</span> <span class="nf">save_best_model</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">state</span><span class="p">):</span>
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<span class="lineno">207</span> <span class="n">directory</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="s2">"./save/</span><span class="si">%s</span><span class="s2">-best-model/"</span><span class="o">%</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">))</span>
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<span class="lineno">208</span> <span class="k">if</span> <span class="ow">not</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="n">directory</span><span class="p">):</span>
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<span class="lineno">209</span> <span class="n">os</span><span class="o">.</span><span class="n">mkdir</span><span class="p">(</span><span class="n">directory</span><span class="p">)</span>
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<span class="lineno">210</span> <span class="n">torch</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">state</span><span class="p">,</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">/model.pt"</span> <span class="o">%</span><span class="p">(</span><span class="n">directory</span><span class="p">))</span></pre></div>
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</div>
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</div>
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</div>
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</div>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-AMS_HTML">
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</script>
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<script type="text/x-mathjax-config">
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