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<section id="module-tyche.individuals">
<span id="tyche-individuals"></span><h1>tyche.individuals<a class="headerlink" href="#module-tyche.individuals" title="Permalink to this heading">¶</a></h1>
<p>This module contains classes used to construct ontological knowledge bases
of individuals, the probabilistic beliefs about them (concepts), and the
probabilistic relationships between them (roles). These belief models
can be used as contexts to evaluate aleatoric description logic (ADL)
sentences. This module also contains many learning strategies that may
be used to update your belief models based upon ADL observations.</p>
<dl class="py exception">
<dt class="sig sig-object py" id="tyche.individuals.TycheIndividualsException">
<em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">TycheIndividualsException</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">message</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheIndividualsException"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheIndividualsException" title="Permalink to this definition">¶</a></dt>
<dd><p>An exception type that is thrown when errors occur in
the construction or use of individuals.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>message</strong> (<em>str</em>) – </p>
</dd>
</dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">TycheAccessorStore</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">type_name</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">accessors</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">Generic</span></code>[<code class="xref py py-obj docutils literal notranslate"><span class="pre">AccessedValueType</span></code>]</p>
<p>Stores a set of ways to access concepts or roles from a Tyche individual.</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>type_name</strong> (<em>str</em>) – </p></li>
<li><p><strong>accessors</strong> (<em>dict</em><em>[</em><em>str</em><em>, </em><a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference"><em>tyche.references.SymbolReference</em></a><em>[</em><em>~AccessedValueType</em><em>]</em><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.contains">
<span class="sig-name descname"><span class="pre">contains</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.contains"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.contains" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns whether this store contains a reference to the given symbol.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>bool</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.get_reference">
<span class="sig-name descname"><span class="pre">get_reference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.get_reference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.get_reference" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the reference to access the given symbol.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference"><em>SymbolReference</em></a>[<em>AccessedValueType</em>]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.get">
<span class="sig-name descname"><span class="pre">get</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.get"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.get" title="Permalink to this definition">¶</a></dt>
<dd><p>Accesses the given symbol from the given object.</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>obj</strong> (<em>any</em>) – </p></li>
<li><p><strong>symbol</strong> (<em>str</em>) – </p></li>
</ul>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><em>AccessedValueType</em></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.set">
<span class="sig-name descname"><span class="pre">set</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">value</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.set"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.set" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the given symbol in the given object.</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>obj</strong> (<em>any</em>) – </p></li>
<li><p><strong>symbol</strong> (<em>str</em>) – </p></li>
<li><p><strong>value</strong> (<em>AccessedValueType</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.get_accessor_stores_map">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">get_accessor_stores_map</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">accessor_type</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.get_accessor_stores_map"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.get_accessor_stores_map" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a map from Individual subclass types to their accessor stores for the given type of accessors.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>accessor_type</strong> (<em>type</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>dict[type, ‘TycheAccessorStore’]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.get_accessor_ref_map">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">get_accessor_ref_map</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">accessor_type</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.get_accessor_ref_map"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.get_accessor_ref_map" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a map from Individual subclass types to their accessor stores for the given type of accessors.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>accessor_type</strong> (<em>type</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>dict[type, dict[str, <a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference">tyche.references.SymbolReference</a>[~AccessedValueType]]]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.TycheAccessorStore.get_or_populate_for">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">get_or_populate_for</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj_type</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">accessor_type</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">field_type_hint</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">type_name</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheAccessorStore.get_or_populate_for"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheAccessorStore.get_or_populate_for" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets or populates the set of accessors associated with obj_type, and returns them.</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>obj_type</strong> (<em>type</em>) – </p></li>
<li><p><strong>accessor_type</strong> (<em>type</em>) – </p></li>
<li><p><strong>field_type_hint</strong> (<em>type</em>) – </p></li>
<li><p><strong>type_name</strong> (<em>str</em>) – </p></li>
</ul>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="#tyche.individuals.TycheAccessorStore" title="tyche.individuals.TycheAccessorStore"><em>TycheAccessorStore</em></a></p>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.ConceptFunctionSymbolReference">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">ConceptFunctionSymbolReference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fget</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fset</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_strat</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#ConceptFunctionSymbolReference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.ConceptFunctionSymbolReference" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="references.html#tyche.references.FunctionSymbolReference" title="tyche.references.FunctionSymbolReference"><code class="xref py py-class docutils literal notranslate"><span class="pre">FunctionSymbolReference</span></code></a></p>
<p>Represents a reference to a concept, with additional information about the concept attached.</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>symbol</strong> (<em>str</em>) – </p></li>
<li><p><strong>fget</strong> (<em>Callable</em><em>[</em><em>[</em><em>any</em><em>]</em><em>, </em><em>TycheConceptValue</em><em>]</em>) – </p></li>
<li><p><strong>fset</strong> (<em>Optional</em><em>[</em><em>Callable</em><em>[</em><em>[</em><em>any</em><em>, </em><em>TycheConceptValue</em><em>]</em><em>, </em><em>None</em><em>]</em><em>]</em>) – </p></li>
<li><p><strong>learning_strat</strong> (<em>Optional</em><em>[</em><a class="reference internal" href="#tyche.individuals.ConceptLearningStrategy" title="tyche.individuals.ConceptLearningStrategy"><em>ConceptLearningStrategy</em></a><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.RoleFunctionSymbolReference">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">RoleFunctionSymbolReference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fget</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fset</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_strat</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#RoleFunctionSymbolReference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.RoleFunctionSymbolReference" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="references.html#tyche.references.FunctionSymbolReference" title="tyche.references.FunctionSymbolReference"><code class="xref py py-class docutils literal notranslate"><span class="pre">FunctionSymbolReference</span></code></a></p>
<p>Represents a reference to a concept, with additional information about the concept attached.</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>symbol</strong> (<em>str</em>) – </p></li>
<li><p><strong>fget</strong> (<em>Callable</em><em>[</em><em>[</em><em>any</em><em>]</em><em>, </em><em>TycheRoleValue</em><em>]</em>) – </p></li>
<li><p><strong>fset</strong> (<em>Optional</em><em>[</em><em>Callable</em><em>[</em><em>[</em><em>any</em><em>, </em><em>TycheRoleValue</em><em>]</em><em>, </em><em>None</em><em>]</em><em>]</em>) – </p></li>
<li><p><strong>learning_strat</strong> (<em>Optional</em><em>[</em><a class="reference internal" href="#tyche.individuals.RoleLearningStrategy" title="tyche.individuals.RoleLearningStrategy"><em>RoleLearningStrategy</em></a><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.IndividualPropertyDecorator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">IndividualPropertyDecorator</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">type_name</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fget</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IndividualPropertyDecorator"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IndividualPropertyDecorator" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">Generic</span></code>[<code class="xref py py-obj docutils literal notranslate"><span class="pre">AccessedValueType</span></code>, <code class="xref py py-obj docutils literal notranslate"><span class="pre">LearningStrategyType</span></code>]</p>
<p>A decorator to mark methods as providing the value of a concept or role,
and to provide additional metadata or learning functions.</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>type_name</strong> (<em>str</em>) – </p></li>
<li><p><strong>fget</strong> (<em>Callable</em><em>[</em><em>[</em><a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a><em>]</em><em>, </em><em>AccessedValueType</em><em>]</em>) – </p></li>
<li><p><strong>symbol</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IndividualPropertyDecorator.learning_func">
<span class="sig-name descname"><span class="pre">learning_func</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">learning_strat</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IndividualPropertyDecorator.learning_func"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IndividualPropertyDecorator.learning_func" title="Permalink to this definition">¶</a></dt>
<dd><p>This can be used as a decorator to register a method-based setter for this symbol.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>learning_strat</strong> (<em>Optional</em><em>[</em><em>LearningStrategyType</em><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><em>Callable</em>[[<em>Callable</em>[[<a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a>, <em>AccessedValueType</em>], None]], <em>Callable</em>[[<a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a>, <em>AccessedValueType</em>], None]]</p>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.TycheConceptDecorator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">TycheConceptDecorator</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">fn</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheConceptDecorator"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheConceptDecorator" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.IndividualPropertyDecorator" title="tyche.individuals.IndividualPropertyDecorator"><code class="xref py py-class docutils literal notranslate"><span class="pre">IndividualPropertyDecorator</span></code></a>[<code class="xref py py-obj docutils literal notranslate"><span class="pre">TycheConceptValue</span></code>, <a class="reference internal" href="#tyche.individuals.ConceptLearningStrategy" title="tyche.individuals.ConceptLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">ConceptLearningStrategy</span></code></a>]</p>
<p>Marks that a method provides the value of a concept for use in Tyche formulas.
The name of the function is used as the name of the concept in formulas.</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>fn</strong> (<em>Callable</em><em>[</em><em>[</em><em>]</em><em>, </em><em>TycheConceptValue</em><em>]</em>) – </p></li>
<li><p><strong>symbol</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.TycheRoleDecorator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">TycheRoleDecorator</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">fn</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#TycheRoleDecorator"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.TycheRoleDecorator" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.IndividualPropertyDecorator" title="tyche.individuals.IndividualPropertyDecorator"><code class="xref py py-class docutils literal notranslate"><span class="pre">IndividualPropertyDecorator</span></code></a>[<code class="xref py py-obj docutils literal notranslate"><span class="pre">TycheRoleValue</span></code>, <a class="reference internal" href="#tyche.individuals.RoleLearningStrategy" title="tyche.individuals.RoleLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">RoleLearningStrategy</span></code></a>]</p>
<p>Marks that a method provides the value of a role for use in Tyche formulas.
The name of the function is used as the name of the role in formulas.</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>fn</strong> (<em>Callable</em><em>[</em><em>[</em><em>]</em><em>, </em><em>TycheRoleValue</em><em>]</em>) – </p></li>
<li><p><strong>symbol</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="tyche.individuals.concept">
<span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">concept</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#concept"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.concept" title="Permalink to this definition">¶</a></dt>
<dd><p>Registers a method as supplying the value of a concept for the evaluation of Tyche expressions.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><em>Callable</em>[[<em>Callable</em>[[<a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a>], <em>TycheConceptValue</em>]], <a class="reference internal" href="#tyche.individuals.TycheConceptDecorator" title="tyche.individuals.TycheConceptDecorator"><em>TycheConceptDecorator</em></a>]</p>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="tyche.individuals.role">
<span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">role</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#role"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.role" title="Permalink to this definition">¶</a></dt>
<dd><p>Registers a method as supplying the value of a role for the evaluation of Tyche expressions.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><em>Callable</em>[[<em>Callable</em>[[], <em>TycheRoleValue</em>]], <a class="reference internal" href="#tyche.individuals.TycheRoleDecorator" title="tyche.individuals.TycheRoleDecorator"><em>TycheRoleDecorator</em></a>]</p>
</dd>
</dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.LearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">LearningStrategy</span></span><a class="reference internal" href="_modules/tyche/individuals.html#LearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.LearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Applies changes to individuals to update them based upon observations.</p>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.LearningStrategy.init_for_new_usage">
<span class="sig-name descname"><span class="pre">init_for_new_usage</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#LearningStrategy.init_for_new_usage"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.LearningStrategy.init_for_new_usage" title="Permalink to this definition">¶</a></dt>
<dd><p>If a learning strategy requires per-reference per-individual state, then this can
clone the learning strategy for each new individual and reference. Otherwise, the
state of this learning strategy will be shared for every individual and reference
that uses it (which is fine for stateless learning strategies).</p>
<dl class="field-list simple">
<dt class="field-odd">Return type<span class="colon">:</span></dt>
<dd class="field-odd"><p><em>SelfType_LearningStrategy</em></p>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.ConceptLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">ConceptLearningStrategy</span></span><a class="reference internal" href="_modules/tyche/individuals.html#ConceptLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.ConceptLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.LearningStrategy" title="tyche.individuals.LearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">LearningStrategy</span></code></a></p>
<p>Applies changes to individuals to update them based upon observations of concepts.</p>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.ConceptLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">concept_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#ConceptLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.ConceptLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>concept_ref</strong> (<a class="reference internal" href="#tyche.individuals.ConceptFunctionSymbolReference" title="tyche.individuals.ConceptFunctionSymbolReference"><em>ConceptFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.RoleLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">RoleLearningStrategy</span></span><a class="reference internal" href="_modules/tyche/individuals.html#RoleLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.RoleLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.LearningStrategy" title="tyche.individuals.LearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">LearningStrategy</span></code></a></p>
<p>Applies changes to individuals to update them based upon observations over roles.</p>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.RoleLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">role_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#RoleLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.RoleLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>role_ref</strong> (<a class="reference internal" href="#tyche.individuals.RoleFunctionSymbolReference" title="tyche.individuals.RoleFunctionSymbolReference"><em>RoleFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.DirectConceptLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">DirectConceptLearningStrategy</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#DirectConceptLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.DirectConceptLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.ConceptLearningStrategy" title="tyche.individuals.ConceptLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">ConceptLearningStrategy</span></code></a></p>
<p>The most basic learning strategy that simply updates concepts
to the values they were observed as. A learning rate can be
used to limit the changes to the concept’s value, to stop a
single true observation marking the concept always true.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>learning_rate</strong> (<em>float</em>) – </p>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.DirectConceptLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">concept_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#DirectConceptLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.DirectConceptLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>concept_ref</strong> (<a class="reference internal" href="#tyche.individuals.ConceptFunctionSymbolReference" title="tyche.individuals.ConceptFunctionSymbolReference"><em>ConceptFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalConceptLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">StatisticalConceptLearningStrategy</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">initial_value_weight</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">decay_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">decay_rate_for_decay_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalConceptLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalConceptLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.ConceptLearningStrategy" title="tyche.individuals.ConceptLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">ConceptLearningStrategy</span></code></a></p>
<p>This learning strategy accumulates a running mean of observations
about a concept, and uses it to learn the value of the concept.
An initial value bias can be used to favour the initial value of
the concept until enough observations have been made.</p>
<p>If an initial value is not supplied on construction, then the initial
value is considered to be the value of the concept when the first
observation is made that calls this learning strategy.</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>initial_value_weight</strong> (<em>float</em>) – </p></li>
<li><p><strong>decay_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>decay_rate_for_decay_rate</strong> (<em>float</em>) – </p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalConceptLearningStrategy.init_for_new_usage">
<span class="sig-name descname"><span class="pre">init_for_new_usage</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalConceptLearningStrategy.init_for_new_usage"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalConceptLearningStrategy.init_for_new_usage" title="Permalink to this definition">¶</a></dt>
<dd><p>This is required so that the state of each reference that uses an instance
of this learning strategy is kept separate.</p>
<dl class="field-list simple">
<dt class="field-odd">Return type<span class="colon">:</span></dt>
<dd class="field-odd"><p><em>SelfType_LearningStrategy</em></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalConceptLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">concept_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalConceptLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalConceptLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>concept_ref</strong> (<a class="reference internal" href="#tyche.individuals.ConceptFunctionSymbolReference" title="tyche.individuals.ConceptFunctionSymbolReference"><em>ConceptFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.BayesRuleLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">BayesRuleLearningStrategy</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1.0</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#BayesRuleLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.BayesRuleLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.RoleLearningStrategy" title="tyche.individuals.RoleLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">RoleLearningStrategy</span></code></a></p>
<p>TODO</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>learning_rate</strong> (<em>float</em>) – </p>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.BayesRuleLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">role_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#BayesRuleLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.BayesRuleLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>role_ref</strong> (<a class="reference internal" href="#tyche.individuals.RoleFunctionSymbolReference" title="tyche.individuals.RoleFunctionSymbolReference"><em>RoleFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalRoleLearningStrategy">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">StatisticalRoleLearningStrategy</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">initial_value_weight</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">decay_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">decay_rate_for_decay_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalRoleLearningStrategy"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalRoleLearningStrategy" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#tyche.individuals.RoleLearningStrategy" title="tyche.individuals.RoleLearningStrategy"><code class="xref py py-class docutils literal notranslate"><span class="pre">RoleLearningStrategy</span></code></a></p>
<p>TODO</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>initial_value_weight</strong> (<em>float</em>) – </p></li>
<li><p><strong>decay_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>decay_rate_for_decay_rate</strong> (<em>float</em>) – </p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalRoleLearningStrategy.init_for_new_usage">
<span class="sig-name descname"><span class="pre">init_for_new_usage</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalRoleLearningStrategy.init_for_new_usage"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalRoleLearningStrategy.init_for_new_usage" title="Permalink to this definition">¶</a></dt>
<dd><p>This is required so that the state of each reference that uses an instance
of this learning strategy is kept separate.</p>
<dl class="field-list simple">
<dt class="field-odd">Return type<span class="colon">:</span></dt>
<dd class="field-odd"><p><em>SelfType_LearningStrategy</em></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.StatisticalRoleLearningStrategy.apply">
<span class="sig-name descname"><span class="pre">apply</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">role_ref</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#StatisticalRoleLearningStrategy.apply"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.StatisticalRoleLearningStrategy.apply" title="Permalink to this definition">¶</a></dt>
<dd><p>Modifies the individual to learn the given concept from the given observation of it.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>role_ref</strong> (<a class="reference internal" href="#tyche.individuals.RoleFunctionSymbolReference" title="tyche.individuals.RoleFunctionSymbolReference"><em>RoleFunctionSymbolReference</em></a>) – </p></li>
<li><p><strong>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
<li><p><strong>self</strong> (<em>SelfType_LearningStrategy</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.Individual">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">Individual</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><code class="xref py py-class docutils literal notranslate"><span class="pre">TycheContext</span></code></a></p>
<p>A helper class for representing individual entities in an aleatoric knowledge base.
These roles can be used as contexts to use to evaluate Tyche expressions within.</p>
<p>The concepts and roles about the individual may be stored as instance variables,
or as methods that supply their value.
* Fields can be marked as concepts by giving them the TycheConcept type hint.
* Fields can be marked as roles by giving them the TycheRole type hint.
* Methods can be marked as concepts using the @concept decorator.
* Methods can be marked as roles using the @role decorator.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>name</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.eval">
<span class="sig-name descname"><span class="pre">eval</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">node</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.eval"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.eval" title="Permalink to this definition">¶</a></dt>
<dd><p>Evaluates the given concept to a probability of
it being true if sampled within this context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>node</strong> (<em>CompatibleWithADLNode</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>float</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.eval_role">
<span class="sig-name descname"><span class="pre">eval_role</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">role</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.eval_role"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.eval_role" title="Permalink to this definition">¶</a></dt>
<dd><p>Evaluates the given role to a distribution of possible
other contexts if it were sampled within this context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>role</strong> (<em>CompatibleWithRole</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.describe">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">describe</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj_type</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.describe"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.describe" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a string describing the concepts and roles of the given Individual type.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>obj_type</strong> (<em>Type</em><em>[</em><a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>str</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_concept_names">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">get_concept_names</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj_type</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_concept_names"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_concept_names" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns all the concept names of the given Individual type.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>obj_type</strong> (<em>Type</em><em>[</em><a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>set[str]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_role_names">
<em class="property"><span class="pre">static</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">get_role_names</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj_type</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_role_names"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_role_names" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns all the role names of the given Individual type.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>obj_type</strong> (<em>Type</em><em>[</em><a class="reference internal" href="#tyche.individuals.Individual" title="tyche.individuals.Individual"><em>Individual</em></a><em>]</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>set[str]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.coerce_concept_value">
<em class="property"><span class="pre">classmethod</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">coerce_concept_value</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.coerce_concept_value"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.coerce_concept_value" title="Permalink to this definition">¶</a></dt>
<dd><p>Coerces concept values to a float value in the range [0, 1],
and raises errors if this is not possible.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>value</strong> (<em>any</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>float</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_concept">
<span class="sig-name descname"><span class="pre">get_concept</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_concept"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_concept" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets the probability of the atom with the given symbol
being true, without modification by the context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>float</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_concept_reference">
<span class="sig-name descname"><span class="pre">get_concept_reference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_concept_reference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_concept_reference" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets a mutable reference to the probability of the atom with the given symbol
being true. This reference can be used to get and set the value of the atom.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="references.html#tyche.references.BakedSymbolReference" title="tyche.references.BakedSymbolReference"><em>BakedSymbolReference</em></a>[float]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.coerce_role_value">
<em class="property"><span class="pre">classmethod</span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">coerce_role_value</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.coerce_role_value"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.coerce_role_value" title="Permalink to this definition">¶</a></dt>
<dd><p>Coerces role values to only allow WeightedRoleDistribution.
In the future, this should accept other types of role distributions.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>value</strong> (<em>any</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_role">
<span class="sig-name descname"><span class="pre">get_role</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_role"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_role" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets the role distribution of the role with the
given symbol, without modification by the context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.get_role_reference">
<span class="sig-name descname"><span class="pre">get_role_reference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.get_role_reference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.get_role_reference" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets a mutable reference to the role distribution of the role with the
given symbol. This reference can be used to get and set the value of the role.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference"><em>SymbolReference</em></a>[<a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a>]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.observe">
<span class="sig-name descname"><span class="pre">observe</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.observe"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.observe" title="Permalink to this definition">¶</a></dt>
<dd><p>Learns the roles and concepts within this individual based upon the observation,
and propagate the effects of the observation node to its child nodes.</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>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.Individual.to_str">
<span class="sig-name descname"><span class="pre">to_str</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">detail_lvl</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">indent_lvl</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">0</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#Individual.to_str"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.Individual.to_str" title="Permalink to this definition">¶</a></dt>
<dd><p>A version of str() that allows additional formatting options to be specified.
Allows specifying the number of levels of detail to include, and the
indentation to use while formatting.</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>detail_lvl</strong> (<em>int</em>) – </p></li>
<li><p><strong>indent_lvl</strong> (<em>int</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tyche.individuals.</span></span><span class="sig-name descname"><span class="pre">IdentityIndividual</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">id_role_value=None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">name=None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">entries=None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_strat=<tyche.individuals.BayesRuleLearningStrategy</span> <span class="pre">object></span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><code class="xref py py-class docutils literal notranslate"><span class="pre">TycheContext</span></code></a></p>
<p>Implicitly represents a role over the set of possible states that an individual could take.
Evaluation of concepts and roles with this context will implicitly perform an expectation
over the set of possible individuals in the id role.</p>
<p>The None-individual is not supported for identity roles.</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>id_role_value</strong> (<a class="reference internal" href="language.html#tyche.language.ExclusiveRoleDist" title="tyche.language.ExclusiveRoleDist"><em>ExclusiveRoleDist</em></a>) – </p></li>
<li><p><strong>name</strong> (<em>Optional</em><em>[</em><em>str</em><em>]</em>) – </p></li>
<li><p><strong>entries</strong> (<em>Union</em><em>[</em><em>None</em><em>, </em><em>list</em><em>[</em><em>Union</em><em>[</em><em>ForwardRef</em><em>(</em><em>'TycheContext'</em><em>)</em><em>, </em><em>Tuple</em><em>[</em><em>ForwardRef</em><em>(</em><em>'TycheContext'</em><em>)</em><em>, </em><em>float</em><em>]</em><em>]</em><em>]</em><em>, </em><em>dict</em><em>[</em><em>'TycheContext'</em><em>, </em><em>float</em><em>]</em><em>]</em>) – </p></li>
<li><p><strong>learning_strat</strong> (<em>Optional</em><em>[</em><a class="reference internal" href="#tyche.individuals.RoleLearningStrategy" title="tyche.individuals.RoleLearningStrategy"><em>RoleLearningStrategy</em></a><em>]</em>) – </p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.is_empty">
<span class="sig-name descname"><span class="pre">is_empty</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.is_empty"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.is_empty" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns whether no possible individuals have been added.</p>
<dl class="field-list simple">
<dt class="field-odd">Return type<span class="colon">:</span></dt>
<dd class="field-odd"><p>bool</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.add">
<span class="sig-name descname"><span class="pre">add</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">weight</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.add"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.add" title="Permalink to this definition">¶</a></dt>
<dd><p>Adds a possible individual with the given weight. The weights
represent the relative weight of the individual against the
weights of other individuals. If the given individual already
exists, this will replace their weight.</p>
<p>If no weight is given, the default weight of 1 will be used.</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>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p></li>
<li><p><strong>weight</strong> (<em>float</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.remove">
<span class="sig-name descname"><span class="pre">remove</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">individual</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.remove"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.remove" title="Permalink to this definition">¶</a></dt>
<dd><p>Removes the given individual from this identity individual.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>individual</strong> (<a class="reference internal" href="language.html#tyche.language.TycheContext" title="tyche.language.TycheContext"><em>TycheContext</em></a>) – </p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.eval">
<span class="sig-name descname"><span class="pre">eval</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">node</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.eval"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.eval" title="Permalink to this definition">¶</a></dt>
<dd><p>Evaluates the given concept to a probability of
it being true if sampled within this context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>node</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>float</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.eval_role">
<span class="sig-name descname"><span class="pre">eval_role</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">role</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.eval_role"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.eval_role" title="Permalink to this definition">¶</a></dt>
<dd><p>Evaluates the given role to a distribution of possible
other contexts if it were sampled within this context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>role</strong> (<a class="reference internal" href="language.html#tyche.language.Role" title="tyche.language.Role"><em>Role</em></a>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.get_role">
<span class="sig-name descname"><span class="pre">get_role</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.get_role"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.get_role" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets the role distribution of the role with the
given symbol, without modification by the context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.get_concept">
<span class="sig-name descname"><span class="pre">get_concept</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.get_concept"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.get_concept" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets the probability of the atom with the given symbol
being true, without modification by the context.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p>float</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.get_concept_reference">
<span class="sig-name descname"><span class="pre">get_concept_reference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.get_concept_reference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.get_concept_reference" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets a mutable reference to the probability of the atom with the given symbol
being true. This reference can be used to get and set the value of the atom.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference"><em>SymbolReference</em></a>[float]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.get_role_reference">
<span class="sig-name descname"><span class="pre">get_role_reference</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">symbol</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.get_role_reference"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.get_role_reference" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets a mutable reference to the role distribution of the role with the
given symbol. This reference can be used to get and set the value of the role.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>symbol</strong> (<em>str</em>) – </p>
</dd>
<dt class="field-even">Return type<span class="colon">:</span></dt>
<dd class="field-even"><p><a class="reference internal" href="references.html#tyche.references.SymbolReference" title="tyche.references.SymbolReference"><em>SymbolReference</em></a>[<a class="reference internal" href="language.html#tyche.language.RoleDist" title="tyche.language.RoleDist"><em>RoleDist</em></a>]</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.observe">
<span class="sig-name descname"><span class="pre">observe</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">observation</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">likelihood</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">learning_rate</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.observe"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.observe" title="Permalink to this definition">¶</a></dt>
<dd><p>Attempts to update the beliefs of this individual based upon
an observation of the given concept.</p>
<p>The optional likelihood parameter provides a degree of certainty
about the observation. By default, the observation is assumed to
be reliable.</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>observation</strong> (<a class="reference internal" href="language.html#tyche.language.ADLNode" title="tyche.language.ADLNode"><em>ADLNode</em></a>) – </p></li>
<li><p><strong>likelihood</strong> (<em>float</em>) – </p></li>
<li><p><strong>learning_rate</strong> (<em>float</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="tyche.individuals.IdentityIndividual.to_str">
<span class="sig-name descname"><span class="pre">to_str</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">detail_lvl</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">indent_lvl</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">0</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/tyche/individuals.html#IdentityIndividual.to_str"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#tyche.individuals.IdentityIndividual.to_str" title="Permalink to this definition">¶</a></dt>
<dd><p>A version of str() that allows additional formatting options to be specified.
Allows specifying the number of levels of detail to include, and the
indentation to use while formatting.</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>detail_lvl</strong> (<em>int</em>) – </p></li>
<li><p><strong>indent_lvl</strong> (<em>int</em>) – </p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
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