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<section id="numpy-random-generator-permutation">
<h1>numpy.random.Generator.permutation<a class="headerlink" href="#numpy-random-generator-permutation" title="Link to this heading">#</a></h1>
<p>method</p>
<dl class="py method">
<dt class="sig sig-object py" id="numpy.random.Generator.permutation">
<span class="sig-prename descclassname"><span class="pre">random.Generator.</span></span><span class="sig-name descname"><span class="pre">permutation</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">x</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">axis</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="headerlink" href="#numpy.random.Generator.permutation" title="Link to this definition">#</a></dt>
<dd><p>Randomly permute a sequence, or return a permuted range.</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>x</strong><span class="classifier">int or array_like</span></dt><dd><p>If <em class="xref py py-obj">x</em> is an integer, randomly permute <code class="docutils literal notranslate"><span class="pre">np.arange(x)</span></code>.
If <em class="xref py py-obj">x</em> is an array, make a copy and shuffle the elements
randomly.</p>
</dd>
<dt><strong>axis</strong><span class="classifier">int, optional</span></dt><dd><p>The axis which <em class="xref py py-obj">x</em> is shuffled along. Default is 0.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><dl class="simple">
<dt><strong>out</strong><span class="classifier">ndarray</span></dt><dd><p>Permuted sequence or array range.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="try_examples_outer_container docutils container" id="18761711-a9e9-428d-bdd9-7ecc53811be6">
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<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">rng</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">default_rng</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">rng</span><span class="o">.</span><span class="n">permutation</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span>
<span class="go">array([1, 7, 4, 3, 0, 9, 2, 5, 8, 6]) # random</span>
</pre></div>
</div>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">rng</span><span class="o">.</span><span class="n">permutation</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">9</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">15</span><span class="p">])</span>
<span class="go">array([15, 1, 9, 4, 12]) # random</span>
</pre></div>
</div>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">arr</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mi">9</span><span class="p">)</span><span class="o">.</span><span class="n">reshape</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">3</span><span class="p">))</span>
<span class="gp">>>> </span><span class="n">rng</span><span class="o">.</span><span class="n">permutation</span><span class="p">(</span><span class="n">arr</span><span class="p">)</span>
<span class="go">array([[6, 7, 8], # random</span>
<span class="go"> [0, 1, 2],</span>
<span class="go"> [3, 4, 5]])</span>
</pre></div>
</div>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">rng</span><span class="o">.</span><span class="n">permutation</span><span class="p">(</span><span class="s2">"abc"</span><span class="p">)</span>
<span class="gt">Traceback (most recent call last):</span>
<span class="w"> </span><span class="o">...</span>
<span class="gr">numpy.exceptions.AxisError</span>: <span class="n">axis 0 is out of bounds for array of dimension 0</span>
</pre></div>
</div>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">arr</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mi">9</span><span class="p">)</span><span class="o">.</span><span class="n">reshape</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">3</span><span class="p">))</span>
<span class="gp">>>> </span><span class="n">rng</span><span class="o">.</span><span class="n">permutation</span><span class="p">(</span><span class="n">arr</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="go">array([[0, 2, 1], # random</span>
<span class="go"> [3, 5, 4],</span>
<span class="go"> [6, 8, 7]])</span>
</pre></div>
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