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<section class="tex2jax_ignore mathjax_ignore" id="asyncvectorenv">
<h1>AsyncVectorEnv<a class="headerlink" href="#asyncvectorenv" title="Link to this heading"></a></h1>
<dl class="py class">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">gymnasium.vector.</span></span><span class="sig-name descname"><span class="pre">AsyncVectorEnv</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">env_fns</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Sequence</span><span class="p"><span class="pre">[</span></span><span class="pre">Callable</span><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference internal" href="../../env/#gymnasium.Env" title="gymnasium.core.Env"><span class="pre">Env</span></a><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">]</span></span></span></em>, <em class="sig-param"><span class="n"><span class="pre">shared_memory</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bool</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">copy</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bool</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">context</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">None</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">daemon</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bool</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">worker</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Callable</span><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Callable</span><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference internal" href="../../env/#gymnasium.Env" title="gymnasium.core.Env"><span class="pre">Env</span></a><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Connection</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Connection</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">bool</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Queue</span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">None</span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">None</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation_mode</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference internal" href="../../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">'same'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">autoreset_mode</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">AutoresetMode</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">AutoresetMode.NEXT_STEP</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv" title="Link to this definition"></a></dt>
<dd><p>Vectorized environment that runs multiple environments in parallel.</p>
<p>It uses <code class="docutils literal notranslate"><span class="pre">multiprocessing</span></code> processes, and pipes for communication.</p>
<p class="rubric">Example</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span><span class="w"> </span><span class="nn">gymnasium</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">gym</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gym</span><span class="o">.</span><span class="n">make_vec</span><span class="p">(</span><span class="s2">&quot;Pendulum-v1&quot;</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">vectorization_mode</span><span class="o">=</span><span class="s2">&quot;async&quot;</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">envs</span>
<span class="go">AsyncVectorEnv(Pendulum-v1, num_envs=2)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gym</span><span class="o">.</span><span class="n">vector</span><span class="o">.</span><span class="n">AsyncVectorEnv</span><span class="p">([</span>
<span class="gp">... </span> <span class="k">lambda</span><span class="p">:</span> <span class="n">gym</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">&quot;Pendulum-v1&quot;</span><span class="p">,</span> <span class="n">g</span><span class="o">=</span><span class="mf">9.81</span><span class="p">),</span>
<span class="gp">... </span> <span class="k">lambda</span><span class="p">:</span> <span class="n">gym</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">&quot;Pendulum-v1&quot;</span><span class="p">,</span> <span class="n">g</span><span class="o">=</span><span class="mf">1.62</span><span class="p">)</span>
<span class="gp">... </span><span class="p">])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">envs</span>
<span class="go">AsyncVectorEnv(num_envs=2)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">observations</span><span class="p">,</span> <span class="n">infos</span> <span class="o">=</span> <span class="n">envs</span><span class="o">.</span><span class="n">reset</span><span class="p">(</span><span class="n">seed</span><span class="o">=</span><span class="mi">42</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">observations</span>
<span class="go">array([[-0.14995256, 0.9886932 , -0.12224312],</span>
<span class="go"> [ 0.5760367 , 0.8174238 , -0.91244936]], dtype=float32)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">infos</span>
<span class="go">{}</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">_</span> <span class="o">=</span> <span class="n">envs</span><span class="o">.</span><span class="n">action_space</span><span class="o">.</span><span class="n">seed</span><span class="p">(</span><span class="mi">123</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">observations</span><span class="p">,</span> <span class="n">rewards</span><span class="p">,</span> <span class="n">terminations</span><span class="p">,</span> <span class="n">truncations</span><span class="p">,</span> <span class="n">infos</span> <span class="o">=</span> <span class="n">envs</span><span class="o">.</span><span class="n">step</span><span class="p">(</span><span class="n">envs</span><span class="o">.</span><span class="n">action_space</span><span class="o">.</span><span class="n">sample</span><span class="p">())</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">observations</span>
<span class="go">array([[-0.1851753 , 0.98270553, 0.714599 ],</span>
<span class="go"> [ 0.6193494 , 0.7851154 , -1.0808398 ]], dtype=float32)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">rewards</span>
<span class="go">array([-2.96495728, -1.00214607])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">terminations</span>
<span class="go">array([False, False])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">truncations</span>
<span class="go">array([False, False])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">infos</span>
<span class="go">{}</span>
</pre></div>
</div>
<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>env_fns</strong> Functions that create the environments.</p></li>
<li><p><strong>shared_memory</strong> If <code class="docutils literal notranslate"><span class="pre">True</span></code>, then the observations from the worker processes are communicated back through
shared variables. This can improve the efficiency if the observations are large (e.g. images).</p></li>
<li><p><strong>copy</strong> If <code class="docutils literal notranslate"><span class="pre">True</span></code>, then the <a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.reset" title="gymnasium.vector.AsyncVectorEnv.reset"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AsyncVectorEnv.reset()</span></code></a> and <a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.step" title="gymnasium.vector.AsyncVectorEnv.step"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AsyncVectorEnv.step()</span></code></a> methods
return a copy of the observations.</p></li>
<li><p><strong>context</strong> Context for <cite>multiprocessing</cite>. If <code class="docutils literal notranslate"><span class="pre">None</span></code>, then the default context is used.</p></li>
<li><p><strong>daemon</strong> If <code class="docutils literal notranslate"><span class="pre">True</span></code>, then subprocesses have <code class="docutils literal notranslate"><span class="pre">daemon</span></code> flag turned on; that is, they will quit if
the head process quits. However, <code class="docutils literal notranslate"><span class="pre">daemon=True</span></code> prevents subprocesses to spawn children,
so for some environments you may want to have it set to <code class="docutils literal notranslate"><span class="pre">False</span></code>.</p></li>
<li><p><strong>worker</strong> If set, then use that worker in a subprocess instead of a default one.
Can be useful to override some inner vector env logic, for instance, how resets on termination or truncation are handled.</p></li>
<li><p><strong>observation_mode</strong> Defines how environment observation spaces should be batched. same defines that there should be <code class="docutils literal notranslate"><span class="pre">n</span></code> copies of identical spaces.
different defines that there can be multiple observation spaces with different parameters though requires the same shape and dtype,
warning, may raise unexpected errors. Passing a <code class="docutils literal notranslate"><span class="pre">Tuple[Space,</span> <span class="pre">Space]</span></code> object allows defining a custom <code class="docutils literal notranslate"><span class="pre">single_observation_space</span></code> and
<code class="docutils literal notranslate"><span class="pre">observation_space</span></code>, warning, may raise unexpected errors.</p></li>
<li><p><strong>autoreset_mode</strong> The Autoreset Mode used, see <a class="reference external" href="https://farama.org/Vector-Autoreset-Mode">https://farama.org/Vector-Autoreset-Mode</a> for more information.</p></li>
</ul>
</dd>
</dl>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>worker is an advanced mode option. It provides a high degree of flexibility and a high chance
to shoot yourself in the foot; thus, if you are writing your own worker, it is recommended to start
from the code for <code class="docutils literal notranslate"><span class="pre">_worker</span></code> (or <code class="docutils literal notranslate"><span class="pre">_async_worker</span></code>) method, and add changes.</p>
</div>
<dl class="field-list simple">
<dt class="field-odd">Raises<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>RuntimeError</strong> If the observation space of some sub-environment does not match observation_space
(or, by default, the observation space of the first sub-environment).</p></li>
<li><p><strong>ValueError</strong> If observation_space is a custom space (i.e. not a default space in Gym,
such as gymnasium.spaces.Box, gymnasium.spaces.Discrete, or gymnasium.spaces.Dict) and shared_memory is True.</p></li>
</ul>
</dd>
</dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.reset">
<span class="sig-name descname"><span class="pre">reset</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">seed</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">list</span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">None</span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">None</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">options</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">dict</span><span class="p"><span class="pre">[</span></span><span class="pre">str</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Any</span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">None</span></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">ObsType</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">dict</span><span class="p"><span class="pre">[</span></span><span class="pre">str</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Any</span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv.reset"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.reset" title="Link to this definition"></a></dt>
<dd><p>Resets all sub-environments in parallel and return a batch of concatenated observations and info.</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>seed</strong> The environment reset seeds</p></li>
<li><p><strong>options</strong> If to return the options</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><strong>A batch of observations and info from the vectorized environment.</strong></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.step">
<span class="sig-name descname"><span class="pre">step</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">actions</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ActType</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">ObsType</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ArrayType</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ArrayType</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ArrayType</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">dict</span><span class="p"><span class="pre">[</span></span><span class="pre">str</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">Any</span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv.step"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.step" title="Link to this definition"></a></dt>
<dd><p>Take an action for each parallel environment.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>actions</strong> element of <code class="xref py py-attr docutils literal notranslate"><span class="pre">action_space</span></code> batch of actions.</p>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><strong>Batch of</strong> (<em>observations, rewards, terminations, truncations, infos</em>)</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.close">
<span class="sig-name descname"><span class="pre">close</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Any</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.close" title="Link to this definition"></a></dt>
<dd><p>Close all parallel environments and release resources.</p>
<p>It also closes all the existing image viewers, then calls <code class="xref py py-meth docutils literal notranslate"><span class="pre">close_extras()</span></code> and set
<code class="xref py py-attr docutils literal notranslate"><span class="pre">closed</span></code> as <code class="docutils literal notranslate"><span class="pre">True</span></code>.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>This function itself does not close the environments, it should be handled
in <code class="xref py py-meth docutils literal notranslate"><span class="pre">close_extras()</span></code>. This is generic for both synchronous and asynchronous
vectorized environments.</p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This will be automatically called when garbage collected or program exited.</p>
</div>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>**kwargs</strong> Keyword arguments passed to <code class="xref py py-meth docutils literal notranslate"><span class="pre">close_extras()</span></code></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.call">
<span class="sig-name descname"><span class="pre">call</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Any</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Any</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">Any</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="p"><span class="pre">...</span></span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv.call"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.call" title="Link to this definition"></a></dt>
<dd><p>Call a method from each parallel environment with args and kwargs.</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>name</strong> (<em>str</em>) Name of the method or property to call.</p></li>
<li><p><strong>*args</strong> Position arguments to apply to the method call.</p></li>
<li><p><strong>**kwargs</strong> Keyword arguments to apply to the method call.</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><strong>List of the results of the individual calls to the method or property for each environment.</strong></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.get_attr">
<span class="sig-name descname"><span class="pre">get_attr</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">Any</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="p"><span class="pre">...</span></span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv.get_attr"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.get_attr" title="Link to this definition"></a></dt>
<dd><p>Get a property from each parallel environment.</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>str</em>) Name of the property to be get from each individual environment.</p>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><strong>The property with name</strong></p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.set_attr">
<span class="sig-name descname"><span class="pre">set_attr</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">str</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">values</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">list</span><span class="p"><span class="pre">[</span></span><span class="pre">Any</span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">Any</span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">object</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/gymnasium/vector/async_vector_env/#AsyncVectorEnv.set_attr"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.set_attr" title="Link to this definition"></a></dt>
<dd><p>Sets an attribute of the sub-environments.</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>name</strong> Name of the property to be set in each individual environment.</p></li>
<li><p><strong>values</strong> Values of the property to be set to. If <code class="docutils literal notranslate"><span class="pre">values</span></code> is a list or
tuple, then it corresponds to the values for each individual
environment, otherwise a single value is set for all environments.</p></li>
</ul>
</dd>
<dt class="field-even">Raises<span class="colon">:</span></dt>
<dd class="field-even"><ul class="simple">
<li><p><strong>ValueError</strong> Values must be a list or tuple with length equal to the number of environments.</p></li>
<li><p><strong>AlreadyPendingCallError</strong> Calling <a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.set_attr" title="gymnasium.vector.AsyncVectorEnv.set_attr"><code class="xref py py-meth docutils literal notranslate"><span class="pre">set_attr()</span></code></a> while waiting for a pending call to complete.</p></li>
</ul>
</dd>
</dl>
</dd></dl>
</dd></dl>
<section id="additional-methods">
<h2>Additional Methods<a class="headerlink" href="#additional-methods" title="Link to this heading"></a></h2>
<dl class="py property">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.np_random">
<em class="property"><span class="pre">property</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">AsyncVectorEnv.</span></span><span class="sig-name descname"><span class="pre">np_random</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">Generator</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="p"><span class="pre">...</span></span><span class="p"><span class="pre">]</span></span></em><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.np_random" title="Link to this definition"></a></dt>
<dd><p>Returns the tuple of the numpy random number generators for the wrapped envs.</p>
</dd></dl>
<dl class="py property">
<dt class="sig sig-object py" id="gymnasium.vector.AsyncVectorEnv.np_random_seed">
<em class="property"><span class="pre">property</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">AsyncVectorEnv.</span></span><span class="sig-name descname"><span class="pre">np_random_seed</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="p"><span class="pre">...</span></span><span class="p"><span class="pre">]</span></span></em><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv.np_random_seed" title="Link to this definition"></a></dt>
<dd><p>Returns a tuple of np_random seeds for all the wrapped envs.</p>
</dd></dl>
</section>
</section>
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<ul>
<li><a class="reference internal" href="#">AsyncVectorEnv</a><ul>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv</span></code></a><ul>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.reset"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.reset()</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.step"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.step()</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.close"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.close()</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.call"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.call()</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.get_attr"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.get_attr()</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.set_attr"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.set_attr()</span></code></a></li>
</ul>
</li>
<li><a class="reference internal" href="#additional-methods">Additional Methods</a><ul>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.np_random"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.np_random</span></code></a></li>
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv.np_random_seed"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv.np_random_seed</span></code></a></li>
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