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2022-12-02 21:35:01 +08:00
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2022-11-28 19:21:26 +08:00
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<li>dna_viewer.util.reader</li>
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<h1>Source code for dna_viewer.util.reader</h1><div class="highlight"><pre>
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<span></span><span class="kn">import</span> <span class="nn">dna</span>
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<div class="viewcode-block" id="Reader"><a class="viewcode-back" href="../../../dna_viewer.util.html#dna_viewer.util.reader.Reader">[docs]</a><span class="k">class</span> <span class="nc">Reader</span><span class="p">:</span>
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<span class="sd">"""</span>
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<span class="sd"> A utility class used for reading DNA files</span>
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<span class="sd"> """</span>
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<div class="viewcode-block" id="Reader.create_stream_reader"><a class="viewcode-back" href="../../../dna_viewer.util.html#dna_viewer.util.reader.Reader.create_stream_reader">[docs]</a> <span class="nd">@staticmethod</span>
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<span class="k">def</span> <span class="nf">create_stream_reader</span><span class="p">(</span><span class="n">dna_path</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">dna</span><span class="o">.</span><span class="n">BinaryStreamReader</span><span class="p">:</span>
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<span class="sd">"""</span>
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<span class="sd"> Creates a stream reader needed for reading values from the DNA file.</span>
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<span class="sd"> @type dna_path: str</span>
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<span class="sd"> @param dna_path: The path of the DNA file</span>
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<span class="sd"> @rtype: dna.BinaryStreamReader</span>
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<span class="sd"> @returns: The stream reader needed for reading values from the DNA file</span>
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<span class="sd"> """</span>
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<span class="n">stream</span> <span class="o">=</span> <span class="n">dna</span><span class="o">.</span><span class="n">FileStream</span><span class="p">(</span>
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<span class="n">dna_path</span><span class="p">,</span> <span class="n">dna</span><span class="o">.</span><span class="n">FileStream</span><span class="o">.</span><span class="n">AccessMode_Read</span><span class="p">,</span> <span class="n">dna</span><span class="o">.</span><span class="n">FileStream</span><span class="o">.</span><span class="n">OpenMode_Binary</span>
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<span class="p">)</span>
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<span class="n">reader</span> <span class="o">=</span> <span class="n">dna</span><span class="o">.</span><span class="n">BinaryStreamReader</span><span class="p">(</span><span class="n">stream</span><span class="p">,</span> <span class="n">dna</span><span class="o">.</span><span class="n">DataLayer_All</span><span class="p">)</span>
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<span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
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<span class="k">if</span> <span class="ow">not</span> <span class="n">dna</span><span class="o">.</span><span class="n">Status</span><span class="o">.</span><span class="n">isOk</span><span class="p">():</span>
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<span class="n">status</span> <span class="o">=</span> <span class="n">dna</span><span class="o">.</span><span class="n">Status</span><span class="o">.</span><span class="n">get</span><span class="p">()</span>
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<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Error loading DNA: </span><span class="si">{</span><span class="n">status</span><span class="o">.</span><span class="n">message</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">reader</span></div></div>
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</pre></div>
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