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<li><a class="reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sklearn.base</span></code>.ClassNamePrefixFeaturesOutMixin</a><ul>
<li><a class="reference internal" href="#sklearn.base.ClassNamePrefixFeaturesOutMixin"><code class="docutils literal notranslate"><span class="pre">ClassNamePrefixFeaturesOutMixin</span></code></a><ul>
<li><a class="reference internal" href="#sklearn.base.ClassNamePrefixFeaturesOutMixin.get_feature_names_out"><code class="docutils literal notranslate"><span class="pre">ClassNamePrefixFeaturesOutMixin.get_feature_names_out</span></code></a></li>
</ul>
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<section id="sklearn-base-classnameprefixfeaturesoutmixin">
<h1><a class="reference internal" href="../classes.html#module-sklearn.base" title="sklearn.base"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sklearn.base</span></code></a>.ClassNamePrefixFeaturesOutMixin<a class="headerlink" href="#sklearn-base-classnameprefixfeaturesoutmixin" title="Permalink to this heading">¶</a></h1>
<dl class="py class">
<dt class="sig sig-object py" id="sklearn.base.ClassNamePrefixFeaturesOutMixin">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">sklearn.base.</span></span><span class="sig-name descname"><span class="pre">ClassNamePrefixFeaturesOutMixin</span></span><a class="reference external" href="https://github.com/scikit-learn/scikit-learn/blob/3f89022fa/sklearn/base.py#L953"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#sklearn.base.ClassNamePrefixFeaturesOutMixin" title="Permalink to this definition">¶</a></dt>
<dd><p>Mixin class for transformers that generate their own names by prefixing.</p>
<p>This mixin is useful when the transformer needs to generate its own feature
names out, such as <a class="reference internal" href="sklearn.decomposition.PCA.html#sklearn.decomposition.PCA" title="sklearn.decomposition.PCA"><code class="xref py py-class docutils literal notranslate"><span class="pre">PCA</span></code></a>. For example, if
<a class="reference internal" href="sklearn.decomposition.PCA.html#sklearn.decomposition.PCA" title="sklearn.decomposition.PCA"><code class="xref py py-class docutils literal notranslate"><span class="pre">PCA</span></code></a> outputs 3 features, then the generated feature
names out are: <code class="docutils literal notranslate"><span class="pre">["pca0",</span> <span class="pre">"pca1",</span> <span class="pre">"pca2"]</span></code>.</p>
<p>This mixin assumes that a <code class="docutils literal notranslate"><span class="pre">_n_features_out</span></code> attribute is defined when the
transformer is fitted. <code class="docutils literal notranslate"><span class="pre">_n_features_out</span></code> is the number of output features
that the transformer will return in <code class="docutils literal notranslate"><span class="pre">transform</span></code> of <code class="docutils literal notranslate"><span class="pre">fit_transform</span></code>.</p>
<p class="rubric">Methods</p>
<table class="autosummary longtable docutils align-default">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="#sklearn.base.ClassNamePrefixFeaturesOutMixin.get_feature_names_out" title="sklearn.base.ClassNamePrefixFeaturesOutMixin.get_feature_names_out"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_feature_names_out</span></code></a>([input_features])</p></td>
<td><p>Get output feature names for transformation.</p></td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt class="sig sig-object py" id="sklearn.base.ClassNamePrefixFeaturesOutMixin.get_feature_names_out">
<span class="sig-name descname"><span class="pre">get_feature_names_out</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">input_features</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 external" href="https://github.com/scikit-learn/scikit-learn/blob/3f89022fa/sklearn/base.py#L966"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#sklearn.base.ClassNamePrefixFeaturesOutMixin.get_feature_names_out" title="Permalink to this definition">¶</a></dt>
<dd><p>Get output feature names for transformation.</p>
<p>The feature names out will prefixed by the lowercased class name. For
example, if the transformer outputs 3 features, then the feature names
out are: <code class="docutils literal notranslate"><span class="pre">["class_name0",</span> <span class="pre">"class_name1",</span> <span class="pre">"class_name2"]</span></code>.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>input_features</strong><span class="classifier">array-like of str or None, default=None</span></dt><dd><p>Only used to validate feature names with the names seen in <code class="docutils literal notranslate"><span class="pre">fit</span></code>.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><dl class="simple">
<dt><strong>feature_names_out</strong><span class="classifier">ndarray of str objects</span></dt><dd><p>Transformed feature names.</p>
</dd>
</dl>
</dd>
</dl>
</dd></dl>
</dd></dl>
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