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<div class="section" id="generator">
<h1>Generator<a class="headerlink" href="#generator" title="Permalink to this heading">¶</a></h1>
<dl class="py class">
<dt class="sig sig-object py" id="torch.Generator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">torch.</span></span><span class="sig-name descname"><span class="pre">Generator</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">device</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'cpu'</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#torch.Generator" title="Permalink to this definition">¶</a></dt>
<dd><p>Creates and returns a generator object that manages the state of the algorithm which
produces pseudo random numbers. Used as a keyword argument in many <a class="reference internal" href="../torch.html#inplace-random-sampling"><span class="std std-ref">In-place random sampling</span></a>
functions.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>device</strong> (<a class="reference internal" href="../tensor_attributes.html#torch.device" title="torch.device"><code class="xref py py-class docutils literal notranslate"><span class="pre">torch.device</span></code></a>, optional) – the desired device for the generator.</p>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><p>An torch.Generator object.</p>
</dd>
<dt class="field-odd">Return type</dt>
<dd class="field-odd"><p><a class="reference internal" href="#torch.Generator" title="torch.Generator">Generator</a></p>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cuda</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="s1">'cuda'</span><span class="p">)</span>
</pre></div>
</div>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.clone_state">
<span class="sig-name descname"><span class="pre">clone_state</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="#torch.Generator" title="torch.Generator"><span class="pre">torch.Generator</span></a></span></span><a class="headerlink" href="#torch.Generator.clone_state" title="Permalink to this definition">¶</a></dt>
<dd><p>Clones the current state of the generator and returns a new generator pointing to this cloned state.
This method is beneficial for preserving a particular state of a generator to restore at a later point.</p>
<dl class="field-list simple">
<dt class="field-odd">Returns</dt>
<dd class="field-odd"><p>A Generator pointing to the newly cloned state.</p>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference internal" href="#torch.Generator" title="torch.Generator">torch.Generator</a></p>
</dd>
</dl>
<p class="rubric">Example</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cuda</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="s1">'cuda'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">cloned_state</span> <span class="o">=</span> <span class="n">g_cuda</span><span class="o">.</span><span class="n">clone_state</span><span class="p">()</span>
</pre></div>
</div>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="torch.Generator.device">
<span class="sig-name descname"><span class="pre">device</span></span><a class="headerlink" href="#torch.Generator.device" title="Permalink to this definition">¶</a></dt>
<dd><p>Generator.device -> device</p>
<p>Gets the current device of the generator.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">device</span>
<span class="go">device(type='cpu')</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.get_state">
<span class="sig-name descname"><span class="pre">get_state</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="../tensors.html#torch.Tensor" title="torch.Tensor"><span class="pre">Tensor</span></a></span></span><a class="headerlink" href="#torch.Generator.get_state" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the Generator state as a <code class="docutils literal notranslate"><span class="pre">torch.ByteTensor</span></code>.</p>
<dl class="field-list simple">
<dt class="field-odd">Returns</dt>
<dd class="field-odd"><p>A <code class="docutils literal notranslate"><span class="pre">torch.ByteTensor</span></code> which contains all the necessary bits
to restore a Generator to a specific point in time.</p>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference internal" href="../tensors.html#torch.Tensor" title="torch.Tensor">Tensor</a></p>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">get_state</span><span class="p">()</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.graphsafe_get_state">
<span class="sig-name descname"><span class="pre">graphsafe_get_state</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="#torch.Generator" title="torch.Generator"><span class="pre">torch.Generator</span></a></span></span><a class="headerlink" href="#torch.Generator.graphsafe_get_state" title="Permalink to this definition">¶</a></dt>
<dd><p>Retrieves the current state of the generator in a manner that is safe for graph capture.
This method is crucial for ensuring that the generator’s state can be captured in the CUDA graph.</p>
<dl class="field-list simple">
<dt class="field-odd">Returns</dt>
<dd class="field-odd"><p>A Generator point to the current state of the generator</p>
</dd>
<dt class="field-even">Return type</dt>
<dd class="field-even"><p><a class="reference internal" href="#torch.Generator" title="torch.Generator">torch.Generator</a></p>
</dd>
</dl>
<p class="rubric">Example</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cuda</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="s1">'cuda'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">current_state</span> <span class="o">=</span> <span class="n">g_cuda</span><span class="o">.</span><span class="n">graphsafe_get_state</span><span class="p">()</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.graphsafe_set_state">
<span class="sig-name descname"><span class="pre">graphsafe_set_state</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">state</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span></span><a class="headerlink" href="#torch.Generator.graphsafe_set_state" title="Permalink to this definition">¶</a></dt>
<dd><p>Sets the state of the generator to the specified state in a manner that is safe for use in graph capture.
This method is crucial for ensuring that the generator’s state can be captured in the CUDA graph.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>state</strong> (<a class="reference internal" href="#torch.Generator" title="torch.Generator"><em>torch.Generator</em></a>) – A Generator point to the new state for the generator, typically obtained from <cite>graphsafe_get_state</cite>.</p>
</dd>
</dl>
<p class="rubric">Example</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cuda</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="s1">'cuda'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">g_cuda_other</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="s1">'cuda'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">current_state</span> <span class="o">=</span> <span class="n">g_cuda_other</span><span class="o">.</span><span class="n">graphsafe_get_state</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cuda</span><span class="o">.</span><span class="n">graphsafe_set_state</span><span class="p">(</span><span class="n">current_state</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.initial_seed">
<span class="sig-name descname"><span class="pre">initial_seed</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><span class="pre">int</span></a></span></span><a class="headerlink" href="#torch.Generator.initial_seed" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the initial seed for generating random numbers.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">initial_seed</span><span class="p">()</span>
<span class="go">2147483647</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.manual_seed">
<span class="sig-name descname"><span class="pre">manual_seed</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">seed</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="#torch.Generator" title="torch.Generator"><span class="pre">Generator</span></a></span></span><a class="headerlink" href="#torch.Generator.manual_seed" title="Permalink to this definition">¶</a></dt>
<dd><p>Sets the seed for generating random numbers. Returns a <cite>torch.Generator</cite> object. Any 32-bit integer is a valid seed.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>seed</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><em>int</em></a>) – The desired seed. Value must be within the inclusive range
<cite>[-0x8000_0000_0000_0000, 0xffff_ffff_ffff_ffff]</cite>. Otherwise, a RuntimeError
is raised. Negative inputs are remapped to positive values with the formula
<cite>0xffff_ffff_ffff_ffff + seed</cite>.</p>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><p>An torch.Generator object.</p>
</dd>
<dt class="field-odd">Return type</dt>
<dd class="field-odd"><p><a class="reference internal" href="#torch.Generator" title="torch.Generator">Generator</a></p>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">manual_seed</span><span class="p">(</span><span class="mi">2147483647</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.seed">
<span class="sig-name descname"><span class="pre">seed</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><span class="pre">int</span></a></span></span><a class="headerlink" href="#torch.Generator.seed" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets a non-deterministic random number from std::random_device or the current
time and uses it to seed a Generator.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">seed</span><span class="p">()</span>
<span class="go">1516516984916</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="torch.Generator.set_state">
<span class="sig-name descname"><span class="pre">set_state</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">new_state</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">void</span></span></span><a class="headerlink" href="#torch.Generator.set_state" title="Permalink to this definition">¶</a></dt>
<dd><p>Sets the Generator state.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>new_state</strong> (<em>torch.ByteTensor</em>) – The desired state.</p>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">g_cpu</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu_other</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">Generator</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">g_cpu</span><span class="o">.</span><span class="n">set_state</span><span class="p">(</span><span class="n">g_cpu_other</span><span class="o">.</span><span class="n">get_state</span><span class="p">())</span>
</pre></div>
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