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| <li class="toctree-l3"><a class="reference internal" href="#datasketches.theta_sketch"><code class="docutils literal notranslate"><span class="pre">theta_sketch</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.get_estimate"><code class="docutils literal notranslate"><span class="pre">theta_sketch.get_estimate</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.get_lower_bound"><code class="docutils literal notranslate"><span class="pre">theta_sketch.get_lower_bound</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.get_seed_hash"><code class="docutils literal notranslate"><span class="pre">theta_sketch.get_seed_hash</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.get_upper_bound"><code class="docutils literal notranslate"><span class="pre">theta_sketch.get_upper_bound</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.is_empty"><code class="docutils literal notranslate"><span class="pre">theta_sketch.is_empty</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.is_estimation_mode"><code class="docutils literal notranslate"><span class="pre">theta_sketch.is_estimation_mode</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.is_ordered"><code class="docutils literal notranslate"><span class="pre">theta_sketch.is_ordered</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.num_retained"><code class="docutils literal notranslate"><span class="pre">theta_sketch.num_retained</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.theta"><code class="docutils literal notranslate"><span class="pre">theta_sketch.theta</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.theta64"><code class="docutils literal notranslate"><span class="pre">theta_sketch.theta64</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_sketch.to_string"><code class="docutils literal notranslate"><span class="pre">theta_sketch.to_string</span></code></a></li> |
| </ul> |
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| <li class="toctree-l3"><a class="reference internal" href="#datasketches.update_theta_sketch"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.update_theta_sketch.__init__"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch.__init__()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.update_theta_sketch.compact"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch.compact</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.update_theta_sketch.reset"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch.reset</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.update_theta_sketch.trim"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch.trim</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.update_theta_sketch.update"><code class="docutils literal notranslate"><span class="pre">update_theta_sketch.update</span></code></a></li> |
| </ul> |
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| <li class="toctree-l3"><a class="reference internal" href="#datasketches.compact_theta_sketch"><code class="docutils literal notranslate"><span class="pre">compact_theta_sketch</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.compact_theta_sketch.deserialize"><code class="docutils literal notranslate"><span class="pre">compact_theta_sketch.deserialize()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.compact_theta_sketch.__init__"><code class="docutils literal notranslate"><span class="pre">compact_theta_sketch.__init__()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.compact_theta_sketch.serialize"><code class="docutils literal notranslate"><span class="pre">compact_theta_sketch.serialize</span></code></a></li> |
| </ul> |
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| <li class="toctree-l3"><a class="reference internal" href="#datasketches.theta_union"><code class="docutils literal notranslate"><span class="pre">theta_union</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_union.__init__"><code class="docutils literal notranslate"><span class="pre">theta_union.__init__()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_union.get_result"><code class="docutils literal notranslate"><span class="pre">theta_union.get_result</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_union.update"><code class="docutils literal notranslate"><span class="pre">theta_union.update</span></code></a></li> |
| </ul> |
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| <li class="toctree-l3"><a class="reference internal" href="#datasketches.theta_intersection"><code class="docutils literal notranslate"><span class="pre">theta_intersection</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_intersection.__init__"><code class="docutils literal notranslate"><span class="pre">theta_intersection.__init__()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_intersection.get_result"><code class="docutils literal notranslate"><span class="pre">theta_intersection.get_result</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_intersection.has_result"><code class="docutils literal notranslate"><span class="pre">theta_intersection.has_result</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_intersection.update"><code class="docutils literal notranslate"><span class="pre">theta_intersection.update</span></code></a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_a_not_b.__init__"><code class="docutils literal notranslate"><span class="pre">theta_a_not_b.__init__()</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="#datasketches.theta_a_not_b.compute"><code class="docutils literal notranslate"><span class="pre">theta_a_not_b.compute</span></code></a></li> |
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| |
| <section id="theta-sketch"> |
| <h1>Theta Sketch<a class="headerlink" href="#theta-sketch" title="Link to this heading"></a></h1> |
| <p>Theta sketches are used for distinct counting.</p> |
| <p>The theta package contains the basic sketch classes that are members of the <a class="reference external" href="https://datasketches.apache.org/docs/Theta/ThetaSketchFramework.html">Theta Sketch Framework</a>. |
| There is a separate Tuple package for many of the sketches that are derived from the same algorithms defined in the Theta Sketch Framework paper.</p> |
| <p>The <em>Theta Sketch</em> sketch is a space-efficient method for estimating cardinalities of sets. |
| It can also easily handle set operations (such as union, intersection, difference) while maintaining good accuracy. |
| Theta sketch is a practical variant of the K-Minimum Values sketch which avoids the need to sort the stored |
| hash values on every insertion to the sketch. |
| It has better error properties than the HyperLogLog sketch for set operations beyond the simple union.</p> |
| <p>Set operations (union, intersection, A-not-B) are performed through the use of dedicated objects.</p> |
| <p>Several <a class="reference external" href="https://en.wikipedia.org/wiki/Jaccard_similarity">Jaccard similarity</a> |
| measures can be computed between theta sketches with the <a class="reference internal" href="../helper/jaccard.html#datasketches.theta_jaccard_similarity" title="datasketches.theta_jaccard_similarity"><code class="xref py py-class docutils literal notranslate"><span class="pre">theta_jaccard_similarity</span></code></a> class.</p> |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta_sketch</span></span><a class="headerlink" href="#datasketches.theta_sketch" title="Link to this definition"></a></dt> |
| <dd><p>An abstract base class for theta sketches</p> |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.get_estimate"> |
| <span class="sig-name descname"><span class="pre">get_estimate</span></span><a class="headerlink" href="#datasketches.theta_sketch.get_estimate" title="Link to this definition"></a></dt> |
| <dd><p>Estimate of the distinct count of the input stream</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.get_lower_bound"> |
| <span class="sig-name descname"><span class="pre">get_lower_bound</span></span><a class="headerlink" href="#datasketches.theta_sketch.get_lower_bound" title="Link to this definition"></a></dt> |
| <dd><p>Returns an approximate lower bound on the estimate at standard deviations in {1, 2, 3}</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.get_seed_hash"> |
| <span class="sig-name descname"><span class="pre">get_seed_hash</span></span><a class="headerlink" href="#datasketches.theta_sketch.get_seed_hash" title="Link to this definition"></a></dt> |
| <dd><p>Returns a hash of the seed used in the sketch</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.get_upper_bound"> |
| <span class="sig-name descname"><span class="pre">get_upper_bound</span></span><a class="headerlink" href="#datasketches.theta_sketch.get_upper_bound" title="Link to this definition"></a></dt> |
| <dd><p>Returns an approximate upper bound on the estimate at standard deviations in {1, 2, 3}</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.is_empty"> |
| <span class="sig-name descname"><span class="pre">is_empty</span></span><a class="headerlink" href="#datasketches.theta_sketch.is_empty" title="Link to this definition"></a></dt> |
| <dd><p>Returns True if the sketch is empty, otherwise False</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.is_estimation_mode"> |
| <span class="sig-name descname"><span class="pre">is_estimation_mode</span></span><a class="headerlink" href="#datasketches.theta_sketch.is_estimation_mode" title="Link to this definition"></a></dt> |
| <dd><p>Returns True if sketch is in estimation mode, otherwise False</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.is_ordered"> |
| <span class="sig-name descname"><span class="pre">is_ordered</span></span><a class="headerlink" href="#datasketches.theta_sketch.is_ordered" title="Link to this definition"></a></dt> |
| <dd><p>Returns True if the sketch entries are sorted, otherwise False</p> |
| </dd></dl> |
| |
| <dl class="py property"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.num_retained"> |
| <em class="property"><span class="k"><span class="pre">property</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">num_retained</span></span><a class="headerlink" href="#datasketches.theta_sketch.num_retained" title="Link to this definition"></a></dt> |
| <dd><p>The number of items currently in the sketch</p> |
| </dd></dl> |
| |
| <dl class="py property"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.theta"> |
| <em class="property"><span class="k"><span class="pre">property</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta</span></span><a class="headerlink" href="#datasketches.theta_sketch.theta" title="Link to this definition"></a></dt> |
| <dd><p>Theta (effective sampling rate) as a fraction from 0 to 1</p> |
| </dd></dl> |
| |
| <dl class="py property"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.theta64"> |
| <em class="property"><span class="k"><span class="pre">property</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta64</span></span><a class="headerlink" href="#datasketches.theta_sketch.theta64" title="Link to this definition"></a></dt> |
| <dd><p>Theta as 64-bit value</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_sketch.to_string"> |
| <span class="sig-name descname"><span class="pre">to_string</span></span><a class="headerlink" href="#datasketches.theta_sketch.to_string" title="Link to this definition"></a></dt> |
| <dd><p>Produces a string summary of the sketch</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">update_theta_sketch</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#datasketches.update_theta_sketch" title="Link to this definition"></a></dt> |
| <dd><dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch.__init__"> |
| <span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">self</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">lg_k</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">12</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">p</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">float</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">1.0</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">9001</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#datasketches.update_theta_sketch.__init__" title="Link to this definition"></a></dt> |
| <dd><p>Creates an update_theta_sketch using the provided parameters</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>lg_k</strong> (<em>int</em><em>, </em><em>optional</em>) – base 2 logarithm of the maximum size of the sketch. Default 12.</p></li> |
| <li><p><strong>p</strong> (<em>float</em><em>, </em><em>optional</em>) – an initial sampling rate to use. Default 1.0</p></li> |
| <li><p><strong>seed</strong> (<em>int</em><em>, </em><em>optional</em>) – the seed to use when hashing values</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch.compact"> |
| <span class="sig-name descname"><span class="pre">compact</span></span><a class="headerlink" href="#datasketches.update_theta_sketch.compact" title="Link to this definition"></a></dt> |
| <dd><p>Returns a compacted form of the sketch, optionally sorting it</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch.reset"> |
| <span class="sig-name descname"><span class="pre">reset</span></span><a class="headerlink" href="#datasketches.update_theta_sketch.reset" title="Link to this definition"></a></dt> |
| <dd><p>Resets the sketch to the initial empty state</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch.trim"> |
| <span class="sig-name descname"><span class="pre">trim</span></span><a class="headerlink" href="#datasketches.update_theta_sketch.trim" title="Link to this definition"></a></dt> |
| <dd><p>Removes retained entries in excess of the nominal size k (if any)</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.update_theta_sketch.update"> |
| <span class="sig-name descname"><span class="pre">update</span></span><a class="headerlink" href="#datasketches.update_theta_sketch.update" title="Link to this definition"></a></dt> |
| <dd><p>Overloaded function.</p> |
| <ol class="arabic simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">update(self,</span> <span class="pre">datum:</span> <span class="pre">int)</span> <span class="pre">-></span> <span class="pre">None</span></code></p></li> |
| </ol> |
| <p>Updates the sketch with the given integral value</p> |
| <ol class="arabic simple" start="2"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">update(self,</span> <span class="pre">datum:</span> <span class="pre">float)</span> <span class="pre">-></span> <span class="pre">None</span></code></p></li> |
| </ol> |
| <p>Updates the sketch with the given floating point value</p> |
| <ol class="arabic simple" start="3"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">update(self,</span> <span class="pre">datum:</span> <span class="pre">str)</span> <span class="pre">-></span> <span class="pre">None</span></code></p></li> |
| </ol> |
| <p>Updates the sketch with the given string</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.compact_theta_sketch"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">compact_theta_sketch</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#datasketches.compact_theta_sketch" title="Link to this definition"></a></dt> |
| <dd><p class="rubric">Static Methods:</p> |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.compact_theta_sketch.deserialize"> |
| <span class="sig-name descname"><span class="pre">deserialize</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">bytes</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bytes</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">9001</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="#datasketches.compact_theta_sketch" title="_datasketches.compact_theta_sketch"><span class="pre">_datasketches.compact_theta_sketch</span></a></span></span><a class="headerlink" href="#datasketches.compact_theta_sketch.deserialize" title="Link to this definition"></a></dt> |
| <dd><p>Reads a bytes object and returns the corresponding compact_theta_sketch</p> |
| </dd></dl> |
| |
| <p class="rubric">Non-static Methods:</p> |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.compact_theta_sketch.__init__"> |
| <span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">self</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">arg0</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="#datasketches.theta_sketch" title="_datasketches.theta_sketch"><span class="pre">_datasketches.theta_sketch</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">arg1</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bool</span></span></em>, <em class="sig-param"><span class="positional-only-separator o"><abbr title="Positional-only parameter separator (PEP 570)"><span class="pre">/</span></abbr></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#datasketches.compact_theta_sketch.__init__" title="Link to this definition"></a></dt> |
| <dd><p>Creates a compact_theta_sketch from an existing theta_sketch.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>other</strong> (<a class="reference internal" href="#datasketches.theta_sketch" title="datasketches.theta_sketch"><em>theta_sketch</em></a>) – a source theta_sketch</p></li> |
| <li><p><strong>ordered</strong> (<em>bool</em>) – whether the incoming sketch entries are sorted. Default True</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.compact_theta_sketch.serialize"> |
| <span class="sig-name descname"><span class="pre">serialize</span></span><a class="headerlink" href="#datasketches.compact_theta_sketch.serialize" title="Link to this definition"></a></dt> |
| <dd><p>Serializes the sketch into a bytes object, optionally compressing the data</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.theta_union"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta_union</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#datasketches.theta_union" title="Link to this definition"></a></dt> |
| <dd><dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.theta_union.__init__"> |
| <span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">self</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">lg_k</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">12</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">p</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">float</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">1.0</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">9001</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#datasketches.theta_union.__init__" title="Link to this definition"></a></dt> |
| <dd><p>Creates a theta_union using the provided parameters</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>lg_k</strong> (<em>int</em><em>, </em><em>optional</em>) – base 2 logarithm of the maximum size of the union. Default 12.</p></li> |
| <li><p><strong>p</strong> (<em>float</em><em>, </em><em>optional</em>) – an initial sampling rate to use. Default 1.0</p></li> |
| <li><p><strong>seed</strong> (<em>int</em><em>, </em><em>optional</em>) – the seed to use when hashing values. Must match all sketch seeds.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_union.get_result"> |
| <span class="sig-name descname"><span class="pre">get_result</span></span><a class="headerlink" href="#datasketches.theta_union.get_result" title="Link to this definition"></a></dt> |
| <dd><p>Returns the sketch corresponding to the union result</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_union.update"> |
| <span class="sig-name descname"><span class="pre">update</span></span><a class="headerlink" href="#datasketches.theta_union.update" title="Link to this definition"></a></dt> |
| <dd><p>Updates the union with the given sketch</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.theta_intersection"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta_intersection</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#datasketches.theta_intersection" title="Link to this definition"></a></dt> |
| <dd><dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.theta_intersection.__init__"> |
| <span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">self</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">9001</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#datasketches.theta_intersection.__init__" title="Link to this definition"></a></dt> |
| <dd><p>Creates a theta_intersection using the provided parameters</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><p><strong>seed</strong> (<em>int</em><em>, </em><em>optional</em>) – the seed to use when hashing values. Must match all sketch seeds</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_intersection.get_result"> |
| <span class="sig-name descname"><span class="pre">get_result</span></span><a class="headerlink" href="#datasketches.theta_intersection.get_result" title="Link to this definition"></a></dt> |
| <dd><p>Returns the sketch corresponding to the intersection result</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_intersection.has_result"> |
| <span class="sig-name descname"><span class="pre">has_result</span></span><a class="headerlink" href="#datasketches.theta_intersection.has_result" title="Link to this definition"></a></dt> |
| <dd><p>Returns True if the intersection has a valid result, otherwise False</p> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_intersection.update"> |
| <span class="sig-name descname"><span class="pre">update</span></span><a class="headerlink" href="#datasketches.theta_intersection.update" title="Link to this definition"></a></dt> |
| <dd><p>Intersections the provided sketch with the current intersection state</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="datasketches.theta_a_not_b"> |
| <em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">theta_a_not_b</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#datasketches.theta_a_not_b" title="Link to this definition"></a></dt> |
| <dd><dl class="py method"> |
| <dt class="sig sig-object py" id="datasketches.theta_a_not_b.__init__"> |
| <span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">self</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">9001</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#datasketches.theta_a_not_b.__init__" title="Link to this definition"></a></dt> |
| <dd><p>Creates a tuple_a_not_b object</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><p><strong>seed</strong> (<em>int</em><em>, </em><em>optional</em>) – the seed to use when hashing values. Must match all sketch seeds.</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="datasketches.theta_a_not_b.compute"> |
| <span class="sig-name descname"><span class="pre">compute</span></span><a class="headerlink" href="#datasketches.theta_a_not_b.compute" title="Link to this definition"></a></dt> |
| <dd><p>Returns a sketch with the result of applying the A-not-B operation on the given inputs</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| </section> |
| |
| |
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