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<div class="section" id="active-bugs">
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<h1>Active Bugs<a class="headerlink" href="#active-bugs" title="Permalink to this headline">¶</a></h1>
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<div class="section" id="drill-number-parsing">
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<h2>Drill number parsing<a class="headerlink" href="#drill-number-parsing" title="Permalink to this headline">¶</a></h2>
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<p>The screenshot below show the problematic file:</p>
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<img alt="_images/drill_parse_problem1.png" class="align-center" src="_images/drill_parse_problem1.png" />
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<p>The file reads:</p>
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<div class="highlight-python"><pre>G81
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M48
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METRIC
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T1C00.127
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T2C00.889
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T3C00.900
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T4C01.524
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T5C01.600
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T6C02.032
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T7C02.540
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%
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T002
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X03874Y08092
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X03874Y23333
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X06414Y08092
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X06414Y23333
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X08954Y08092
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...
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T007
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X02664Y03518
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X02664Y41618
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X76324Y03518
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X76324Y41618
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...</pre>
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</div>
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<p>After scaling by 10.0:</p>
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<img alt="_images/drill_parse_problem2.png" class="align-center" src="_images/drill_parse_problem2.png" />
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<p>The code involved is:</p>
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<div class="highlight-python"><div class="highlight"><pre><span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="o">...</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">zeros</span> <span class="o">=</span> <span class="s">"T"</span>
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<span class="o">...</span>
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<span class="k">def</span> <span class="nf">parse_number</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">number_str</span><span class="p">):</span>
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<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">zeros</span> <span class="o">==</span> <span class="s">"L"</span><span class="p">:</span>
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<span class="n">match</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">leadingzeros_re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">number_str</span><span class="p">)</span>
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<span class="k">return</span> <span class="nb">float</span><span class="p">(</span><span class="n">number_str</span><span class="p">)</span><span class="o">/</span><span class="p">(</span><span class="mi">10</span><span class="o">**</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">2</span><span class="p">))</span><span class="o">-</span><span class="mi">2</span><span class="o">+</span><span class="nb">len</span><span class="p">(</span><span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">))))</span>
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<span class="k">else</span><span class="p">:</span> <span class="c"># Trailing</span>
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<span class="k">return</span> <span class="nb">float</span><span class="p">(</span><span class="n">number_str</span><span class="p">)</span><span class="o">/</span><span class="mi">10000</span>
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</pre></div>
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</div>
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<p>The numbers are being divided by 10000. If “L” had been specified,
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the following regex would have applied:</p>
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<div class="highlight-python"><div class="highlight"><pre><span class="c"># Parse coordinates</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">leadingzeros_re</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s">r'^(0*)(\d*)'</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>Then the number 02664 would have been divided by 10**(4-2+1) = 10**3 = 1000,
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which is what is desired.</p>
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<p>Leading zeros weren’t specified, but www.excellon.com says:</p>
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<blockquote>
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<div>The CNC-7 uses leading zeros unless you specify
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otherwise through a part program or the console.</div></blockquote>
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<div class="admonition note">
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<p class="first admonition-title">Note</p>
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<p class="last">The parser has been modified to default to leading
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zeros.</p>
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<li><a class="reference internal" href="#">Active Bugs</a><ul>
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<li><a class="reference internal" href="#drill-number-parsing">Drill number parsing</a></li>
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