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<div><h1 class="main-title">basic calculator II</h1></div>
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<div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="k">def</span> <span class="nf">calculate</span><span class="p">(</span><span class="n">S</span><span class="p">):</span>
<span class="linenos"> 2</span> <span class="n">S</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">n</span><span class="p">,</span> <span class="n">p</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">S</span><span class="si">}</span><span class="s2">+0"</span><span class="p">,</span> <span class="p">[],</span> <span class="mi">0</span><span class="p">,</span> <span class="s2">"+"</span>
<span class="linenos"> 3</span> <span class="n">ops</span> <span class="o">=</span> <span class="p">{</span>
<span class="linenos"> 4</span> <span class="s2">"-"</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="o">-</span><span class="n">x</span><span class="p">),</span>
<span class="linenos"> 5</span> <span class="s2">"+"</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">x</span><span class="p">),</span>
<span class="linenos"> 6</span> <span class="s2">"*"</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> <span class="o">*</span> <span class="n">x</span><span class="p">),</span>
<span class="linenos"> 7</span> <span class="s2">"/"</span><span class="p">:</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> <span class="o">/</span> <span class="n">x</span><span class="p">)),</span>
<span class="linenos"> 8</span> <span class="p">}</span>
<span class="linenos"> 9</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">S</span><span class="p">)):</span>
<span class="linenos">10</span> <span class="k">if</span> <span class="n">S</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">isdigit</span><span class="p">():</span>
<span class="linenos">11</span> <span class="n">n</span> <span class="o">=</span> <span class="n">n</span> <span class="o">*</span> <span class="mi">10</span> <span class="o">+</span> <span class="nb">int</span><span class="p">(</span><span class="n">S</span><span class="p">[</span><span class="n">i</span><span class="p">])</span>
<span class="linenos">12</span> <span class="k">elif</span> <span class="ow">not</span> <span class="n">S</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">isspace</span><span class="p">():</span>
<span class="linenos">13</span> <span class="n">ops</span><span class="p">[</span><span class="n">p</span><span class="p">](</span><span class="n">n</span><span class="p">)</span>
<span class="linenos">14</span> <span class="n">n</span><span class="p">,</span> <span class="n">p</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">S</span><span class="p">[</span><span class="n">i</span><span class="p">]</span>
<span class="linenos">15</span> <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="linenos">16</span>
<span class="linenos">17</span><span class="nb">print</span><span class="p">(</span><span class="n">calculate</span><span class="p">(</span><span class="s2">"3+59*10/100"</span><span class="p">))</span>
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