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2019-04-29 15:26:12 +02:00
<!DOCTYPE html>
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<meta charset="utf-8" />
<title>Welcome to python-rocksdbs documentation! &#8212; python-rocksdb 0.6.7 documentation</title>
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<h1>Welcome to python-rocksdbs documentation!<a class="headerlink" href="#welcome-to-python-rocksdb-s-documentation" title="Permalink to this headline"></a></h1>
<div class="section" id="overview">
<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this headline"></a></h2>
<p>Python bindings to the C++ interface of <a class="reference external" href="http://rocksdb.org/">http://rocksdb.org/</a> using pybind11:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">pyrocksdb</span>
<span class="n">db</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">DB</span><span class="p">()</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">Options</span><span class="p">()</span>
<span class="c1"># for multi-thread</span>
<span class="n">opts</span><span class="o">.</span><span class="n">IncreaseParallelism</span><span class="p">()</span>
<span class="n">opts</span><span class="o">.</span><span class="n">OptimizeLevelStyleCompaction</span><span class="p">()</span>
<span class="n">opts</span><span class="o">.</span><span class="n">create_if_missing</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s1">&#39;/path/to/db&#39;</span><span class="p">)</span>
<span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="c1"># put</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
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<span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;value1&quot;</span><span class="p">)</span>
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<span class="k">assert</span> <span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="c1"># get</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span>
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<span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">)</span>
<span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">data</span><span class="p">)</span> <span class="c1"># b&quot;value1&quot;</span>
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<span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="c1"># true</span>
<span class="c1">#delete</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
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<span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">)</span>
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<span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="n">db</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</pre></div>
</div>
<p>Tested with python3.7</p>
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<div class="section" id="contributing">
<h2>Contributing<a class="headerlink" href="#contributing" title="Permalink to this headline"></a></h2>
<p>Source can be found on <a class="reference external" href="https://github.com/twmht/python-rocksdb/tree/pybind11">github</a>.
Feel free to fork and send pull-requests or create issues on the
<a class="reference external" href="https://github.com/twmht/python-rocksdb/issues">github issue tracker</a></p>
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