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<article role="main">
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<section id="vector">
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<h1>Vector<a class="headerlink" href="#vector" title="Permalink to this heading">#</a></h1>
|
||
<section id="gymnasium-vector-vectorenv">
|
||
<h2>Gymnasium.vector.VectorEnv<a class="headerlink" href="#gymnasium-vector-vectorenv" title="Permalink to this heading">#</a></h2>
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||
<dl class="py class">
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||
<dt class="sig sig-object py" id="gymnasium.vector.VectorEnv">
|
||
<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">VectorEnv</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">num_envs</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">observation_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">action_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a></span></em><span class="sig-paren">)</span><a class="headerlink" href="#gymnasium.vector.VectorEnv" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>Base class for vectorized environments to run multiple independent copies of the same environment in parallel.</p>
|
||
<p>Vector environments can provide a linear speed-up in the steps taken per second through sampling multiple
|
||
sub-environments at the same time. To prevent terminated environments waiting until all sub-environments have
|
||
terminated or truncated, the vector environments autoreset sub-environments after they terminate or truncated.
|
||
As a result, the final step’s observation and info are overwritten by the reset’s observation and info.
|
||
Therefore, the observation and info for the final step of a sub-environment is stored in the info parameter,
|
||
using <cite>“final_observation”</cite> and <cite>“final_info”</cite> respectively. See <a class="reference internal" href="#gymnasium.vector.VectorEnv.step" title="gymnasium.vector.VectorEnv.step"><code class="xref py py-meth docutils literal notranslate"><span class="pre">step()</span></code></a> for more information.</p>
|
||
<p>The vector environments batch <cite>observations</cite>, <cite>rewards</cite>, <cite>terminations</cite>, <cite>truncations</cite> and <cite>info</cite> for each
|
||
parallel environment. In addition, <a class="reference internal" href="#gymnasium.vector.VectorEnv.step" title="gymnasium.vector.VectorEnv.step"><code class="xref py py-meth docutils literal notranslate"><span class="pre">step()</span></code></a> expects to receive a batch of actions for each parallel environment.</p>
|
||
<p>Gymnasium contains two types of Vector environments: <a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv" title="gymnasium.vector.AsyncVectorEnv"><code class="xref py py-class docutils literal notranslate"><span class="pre">AsyncVectorEnv</span></code></a> and <a class="reference internal" href="#gymnasium.vector.SyncVectorEnv" title="gymnasium.vector.SyncVectorEnv"><code class="xref py py-class docutils literal notranslate"><span class="pre">SyncVectorEnv</span></code></a>.</p>
|
||
<p>The Vector Environments have the additional attributes for users to understand the implementation</p>
|
||
<ul class="simple">
|
||
<li><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">num_envs</span></code> - The number of sub-environment in the vector environment</p></li>
|
||
<li><p><a class="reference internal" href="#observation_space" title="observation_space"><code class="xref py py-attr docutils literal notranslate"><span class="pre">observation_space</span></code></a> - The batched observation space of the vector environment</p></li>
|
||
<li><p><a class="reference internal" href="#single_observation_space" title="single_observation_space"><code class="xref py py-attr docutils literal notranslate"><span class="pre">single_observation_space</span></code></a> - The observation space of a single sub-environment</p></li>
|
||
<li><p><a class="reference internal" href="#action_space" title="action_space"><code class="xref py py-attr docutils literal notranslate"><span class="pre">action_space</span></code></a> - The batched action space of the vector environment</p></li>
|
||
<li><p><a class="reference internal" href="#single_action_space" title="single_action_space"><code class="xref py py-attr docutils literal notranslate"><span class="pre">single_action_space</span></code></a> - The action space of a single sub-environment</p></li>
|
||
</ul>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>The info parameter of <a class="reference internal" href="#gymnasium.vector.VectorEnv.reset" title="gymnasium.vector.VectorEnv.reset"><code class="xref py py-meth docutils literal notranslate"><span class="pre">reset()</span></code></a> and <a class="reference internal" href="#gymnasium.vector.VectorEnv.step" title="gymnasium.vector.VectorEnv.step"><code class="xref py py-meth docutils literal notranslate"><span class="pre">step()</span></code></a> was originally implemented before OpenAI Gym v25 was a list
|
||
of dictionary for each sub-environment. However, this was modified in OpenAI Gym v25+ and in Gymnasium to a
|
||
dictionary with a NumPy array for each key. To use the old info style using the <code class="xref py py-class docutils literal notranslate"><span class="pre">VectorListInfo</span></code>.</p>
|
||
</div>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>To render the sub-environments, use <code class="xref py py-meth docutils literal notranslate"><span class="pre">call()</span></code> with “render” arguments. Remember to set the <cite>render_modes</cite>
|
||
for all the sub-environments during initialization.</p>
|
||
</div>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>All parallel environments should share the identical observation and action spaces.
|
||
In other words, a vector of multiple different environments is not supported.</p>
|
||
</div>
|
||
<p>Base class for vectorized 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>num_envs</strong> – Number of environments in the vectorized environment.</p></li>
|
||
<li><p><strong>observation_space</strong> – Observation space of a single environment.</p></li>
|
||
<li><p><strong>action_space</strong> – Action space of a single environment.</p></li>
|
||
</ul>
|
||
</dd>
|
||
</dl>
|
||
</dd></dl>
|
||
|
||
<section id="methods">
|
||
<h3>Methods<a class="headerlink" href="#methods" title="Permalink to this heading">#</a></h3>
|
||
<dl class="py method">
|
||
<dt class="sig sig-object py" id="gymnasium.vector.VectorEnv.reset">
|
||
<span class="sig-prename descclassname"><span class="pre">VectorEnv.</span></span><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">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">Union</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">List</span><span class="p"><span class="pre">[</span></span><span class="pre">int</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><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">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">dict</span><span class="p"><span class="pre">]</span></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><a class="headerlink" href="#gymnasium.vector.VectorEnv.reset" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>Reset all parallel environments and return a batch of initial 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>
|
||
<p>An example:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">gymnasium</span> <span class="k">as</span> <span class="nn">gym</span>
|
||
<span class="gp">>>> </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">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
<span class="go">(array([[-0.02240574, -0.03439831, -0.03904812, 0.02810693],</span>
|
||
<span class="go"> [ 0.01586068, 0.01929009, 0.02394426, 0.04016077],</span>
|
||
<span class="go"> [-0.01314174, 0.03893502, -0.02400815, 0.0038326 ]],</span>
|
||
<span class="go"> dtype=float32), {})</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<dl class="py method">
|
||
<dt class="sig sig-object py" id="gymnasium.vector.VectorEnv.step">
|
||
<span class="sig-prename descclassname"><span class="pre">VectorEnv.</span></span><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></em><span class="sig-paren">)</span><a class="headerlink" href="#gymnasium.vector.VectorEnv.step" title="Permalink 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 <a class="reference internal" href="#action_space" title="action_space"><code class="xref py py-attr docutils literal notranslate"><span class="pre">action_space</span></code></a> 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>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>As the vector environments autoreset for a terminating and truncating sub-environments,
|
||
the returned observation and info is not the final step’s observation or info which is instead stored in
|
||
info as <cite>“final_observation”</cite> and <cite>“final_info”</cite>.</p>
|
||
</div>
|
||
<p>An example:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </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">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
<span class="gp">>>> </span><span class="n">actions</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">])</span>
|
||
<span class="gp">>>> </span><span class="n">observations</span><span class="p">,</span> <span class="n">rewards</span><span class="p">,</span> <span class="n">termination</span><span class="p">,</span> <span class="n">truncation</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">actions</span><span class="p">)</span>
|
||
|
||
<span class="gp">>>> </span><span class="n">observations</span>
|
||
<span class="go">array([[ 0.00122802, 0.16228443, 0.02521779, -0.23700266],</span>
|
||
<span class="go"> [ 0.00788269, -0.17490888, 0.03393489, 0.31735462],</span>
|
||
<span class="go"> [ 0.04918966, 0.19421194, 0.02938497, -0.29495203]],</span>
|
||
<span class="go"> dtype=float32)</span>
|
||
<span class="gp">>>> </span><span class="n">rewards</span>
|
||
<span class="go">array([1., 1., 1.])</span>
|
||
<span class="gp">>>> </span><span class="n">termination</span>
|
||
<span class="go">array([False, False, False])</span>
|
||
<span class="gp">>>> </span><span class="n">termination</span>
|
||
<span class="go">array([False, False, False])</span>
|
||
<span class="gp">>>> </span><span class="n">infos</span>
|
||
<span class="go">{}</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<dl class="py method">
|
||
<dt class="sig sig-object py" id="gymnasium.vector.VectorEnv.close">
|
||
<span class="sig-prename descclassname"><span class="pre">VectorEnv.</span></span><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></em><span class="sig-paren">)</span><a class="headerlink" href="#gymnasium.vector.VectorEnv.close" title="Permalink 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>
|
||
|
||
</section>
|
||
<section id="attributes">
|
||
<h3>Attributes<a class="headerlink" href="#attributes" title="Permalink to this heading">#</a></h3>
|
||
<dl class="py attribute">
|
||
<dt class="sig sig-object py" id="action_space">
|
||
<span class="sig-name descname"><span class="pre">action_space</span></span><a class="headerlink" href="#action_space" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>The (batched) action space. The input actions of <cite>step</cite> must be valid elements of <cite>action_space</cite>.:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gymnasium</span><span class="o">.</span><span class="n">vector</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">action_space</span>
|
||
<span class="go">MultiDiscrete([2 2 2])</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<dl class="py attribute">
|
||
<dt class="sig sig-object py" id="observation_space">
|
||
<span class="sig-name descname"><span class="pre">observation_space</span></span><a class="headerlink" href="#observation_space" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>The (batched) observation space. The observations returned by <cite>reset</cite> and <cite>step</cite> are valid elements of <cite>observation_space</cite>.:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gymnasium</span><span class="o">.</span><span class="n">vector</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">observation_space</span>
|
||
<span class="go">Box([[-4.8 ...]], [[4.8 ...]], (3, 4), float32)</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<dl class="py attribute">
|
||
<dt class="sig sig-object py" id="single_action_space">
|
||
<span class="sig-name descname"><span class="pre">single_action_space</span></span><a class="headerlink" href="#single_action_space" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>The action space of an environment copy.:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gymnasium</span><span class="o">.</span><span class="n">vector</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">single_action_space</span>
|
||
<span class="go">Discrete(2)</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<dl class="py attribute">
|
||
<dt class="sig sig-object py" id="single_observation_space">
|
||
<span class="sig-name descname"><span class="pre">single_observation_space</span></span><a class="headerlink" href="#single_observation_space" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>The observation space of an environment copy.:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">envs</span> <span class="o">=</span> <span class="n">gymnasium</span><span class="o">.</span><span class="n">vector</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">"CartPole-v1"</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">envs</span><span class="o">.</span><span class="n">single_action_space</span>
|
||
<span class="go">Box([-4.8 ...], [4.8 ...], (4,), float32)</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
</section>
|
||
</section>
|
||
<section id="making-vector-environments">
|
||
<h2>Making Vector Environments<a class="headerlink" href="#making-vector-environments" title="Permalink to this heading">#</a></h2>
|
||
<dl class="py function">
|
||
<dt class="sig sig-object py" id="gymnasium.vector.make">
|
||
<span class="sig-prename descclassname"><span class="pre">gymnasium.vector.</span></span><span class="sig-name descname"><span class="pre">make</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">id</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">num_envs</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</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">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">asynchronous</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">wrappers</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">Union</span><span class="p"><span class="pre">[</span></span><span class="pre">callable</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">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><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">disable_env_checker</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">bool</span><span class="p"><span class="pre">]</span></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="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</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="#gymnasium.vector.VectorEnv" title="gymnasium.vector.vector_env.VectorEnv"><span class="pre">VectorEnv</span></a></span></span><a class="headerlink" href="#gymnasium.vector.make" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>Create a vectorized environment from multiple copies of an environment, from its id.</p>
|
||
<p>Example:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">gymnasium</span> <span class="k">as</span> <span class="nn">gym</span>
|
||
<span class="gp">>>> </span><span class="n">env</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">make</span><span class="p">(</span><span class="s1">'CartPole-v1'</span><span class="p">,</span> <span class="n">num_envs</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
|
||
<span class="gp">>>> </span><span class="n">env</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
<span class="go">array([[-0.04456399, 0.04653909, 0.01326909, -0.02099827],</span>
|
||
<span class="go"> [ 0.03073904, 0.00145001, -0.03088818, -0.03131252],</span>
|
||
<span class="go"> [ 0.03468829, 0.01500225, 0.01230312, 0.01825218]],</span>
|
||
<span class="go"> dtype=float32)</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>id</strong> – The environment ID. This must be a valid ID from the registry.</p></li>
|
||
<li><p><strong>num_envs</strong> – Number of copies of the environment.</p></li>
|
||
<li><p><strong>asynchronous</strong> – If <cite>True</cite>, wraps the environments in an <a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv" title="gymnasium.vector.AsyncVectorEnv"><code class="xref py py-class docutils literal notranslate"><span class="pre">AsyncVectorEnv</span></code></a> (which uses <cite>multiprocessing</cite> to run the environments in parallel). If <code class="docutils literal notranslate"><span class="pre">False</span></code>, wraps the environments in a <a class="reference internal" href="#gymnasium.vector.SyncVectorEnv" title="gymnasium.vector.SyncVectorEnv"><code class="xref py py-class docutils literal notranslate"><span class="pre">SyncVectorEnv</span></code></a>.</p></li>
|
||
<li><p><strong>wrappers</strong> – If not <code class="docutils literal notranslate"><span class="pre">None</span></code>, then apply the wrappers to each internal environment during creation.</p></li>
|
||
<li><p><strong>disable_env_checker</strong> – If to run the env checker for the first environment only. None will default to the environment spec <cite>disable_env_checker</cite> parameter
|
||
(that is by default False), otherwise will run according to this argument (True = not run, False = run)</p></li>
|
||
<li><p><strong>**kwargs</strong> – Keywords arguments applied during <cite>gym.make</cite></p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt class="field-even">Returns<span class="colon">:</span></dt>
|
||
<dd class="field-even"><p><strong>The vectorized environment.</strong></p>
|
||
</dd>
|
||
</dl>
|
||
</dd></dl>
|
||
|
||
</section>
|
||
<section id="async-vector-env">
|
||
<h2>Async Vector Env<a class="headerlink" href="#async-vector-env" title="Permalink to this heading">#</a></h2>
|
||
<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></em>, <em class="sig-param"><span class="n"><span class="pre">observation_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a><span class="p"><span class="pre">]</span></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">action_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a><span class="p"><span class="pre">]</span></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">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">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">str</span><span class="p"><span class="pre">]</span></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">Optional</span><span class="p"><span class="pre">[</span></span><span class="pre">callable</span><span class="p"><span class="pre">]</span></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><a class="headerlink" href="#gymnasium.vector.AsyncVectorEnv" title="Permalink 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>Example:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">gymnasium</span> <span class="k">as</span> <span class="nn">gym</span>
|
||
<span class="gp">>>> </span><span class="n">env</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">"Pendulum-v0"</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">"Pendulum-v0"</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">>>> </span><span class="n">env</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
<span class="go">array([[-0.8286432 , 0.5597771 , 0.90249056],</span>
|
||
<span class="go"> [-0.85009176, 0.5266346 , 0.60007906]], dtype=float32)</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>Vectorized environment that runs multiple environments in parallel.</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>env_fns</strong> – Functions that create the environments.</p></li>
|
||
<li><p><strong>observation_space</strong> – Observation space of a single environment. If <code class="docutils literal notranslate"><span class="pre">None</span></code>,
|
||
then the observation space of the first environment is taken.</p></li>
|
||
<li><p><strong>action_space</strong> – Action space of a single environment. If <code class="docutils literal notranslate"><span class="pre">None</span></code>,
|
||
then the action space of the first environment is taken.</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 <code class="xref py py-meth docutils literal notranslate"><span class="pre">reset()</span></code> and <code class="xref py py-meth docutils literal notranslate"><span class="pre">step()</span></code> methods
|
||
return a copy of the observations.</p></li>
|
||
<li><p><strong>context</strong> – Context for <a href="#id1"><span class="problematic" id="id2">`multiprocessing`_</span></a>. 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>
|
||
</ul>
|
||
</dd>
|
||
</dl>
|
||
<dl class="simple">
|
||
<dt>Warnings: worker is an advanced mode option. It provides a high degree of flexibility and a high chance</dt><dd><p>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">_worker_shared_memory</span></code>) method, and add changes.</p>
|
||
</dd>
|
||
</dl>
|
||
<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>
|
||
</dd></dl>
|
||
|
||
</section>
|
||
<section id="sync-vector-env">
|
||
<h2>Sync Vector Env<a class="headerlink" href="#sync-vector-env" title="Permalink to this heading">#</a></h2>
|
||
<dl class="py class">
|
||
<dt class="sig sig-object py" id="gymnasium.vector.SyncVectorEnv">
|
||
<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">SyncVectorEnv</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">Iterator</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">observation_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a><span class="p"><span class="pre">]</span></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">action_space</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Optional</span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="../spaces/#gymnasium.spaces.Space" title="gymnasium.spaces.space.Space"><span class="pre">Space</span></a><span class="p"><span class="pre">]</span></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">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><span class="sig-paren">)</span><a class="headerlink" href="#gymnasium.vector.SyncVectorEnv" title="Permalink to this definition">#</a></dt>
|
||
<dd><p>Vectorized environment that serially runs multiple environments.</p>
|
||
<p>Example:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">gymnasium</span> <span class="k">as</span> <span class="nn">gym</span>
|
||
<span class="gp">>>> </span><span class="n">env</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">SyncVectorEnv</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">"Pendulum-v0"</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">"Pendulum-v0"</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">>>> </span><span class="n">env</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
<span class="go">array([[-0.8286432 , 0.5597771 , 0.90249056],</span>
|
||
<span class="go"> [-0.85009176, 0.5266346 , 0.60007906]], dtype=float32)</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>Vectorized environment that serially runs multiple 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>env_fns</strong> – iterable of callable functions that create the environments.</p></li>
|
||
<li><p><strong>observation_space</strong> – Observation space of a single environment. If <code class="docutils literal notranslate"><span class="pre">None</span></code>,
|
||
then the observation space of the first environment is taken.</p></li>
|
||
<li><p><strong>action_space</strong> – Action space of a single environment. If <code class="docutils literal notranslate"><span class="pre">None</span></code>,
|
||
then the action space of the first environment is taken.</p></li>
|
||
<li><p><strong>copy</strong> – If <code class="docutils literal notranslate"><span class="pre">True</span></code>, then the <code class="xref py py-meth docutils literal notranslate"><span class="pre">reset()</span></code> and <code class="xref py py-meth docutils literal notranslate"><span class="pre">step()</span></code> methods return a copy of the observations.</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt class="field-even">Raises<span class="colon">:</span></dt>
|
||
<dd class="field-even"><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>
|
||
</dd>
|
||
</dl>
|
||
</dd></dl>
|
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<ul>
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<li><a class="reference internal" href="#">Vector</a><ul>
|
||
<li><a class="reference internal" href="#gymnasium-vector-vectorenv">Gymnasium.vector.VectorEnv</a><ul>
|
||
<li><a class="reference internal" href="#gymnasium.vector.VectorEnv"><code class="docutils literal notranslate"><span class="pre">VectorEnv</span></code></a></li>
|
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<li><a class="reference internal" href="#methods">Methods</a><ul>
|
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<li><a class="reference internal" href="#gymnasium.vector.VectorEnv.reset"><code class="docutils literal notranslate"><span class="pre">VectorEnv.reset()</span></code></a></li>
|
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<li><a class="reference internal" href="#gymnasium.vector.VectorEnv.step"><code class="docutils literal notranslate"><span class="pre">VectorEnv.step()</span></code></a></li>
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<li><a class="reference internal" href="#gymnasium.vector.VectorEnv.close"><code class="docutils literal notranslate"><span class="pre">VectorEnv.close()</span></code></a></li>
|
||
</ul>
|
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</li>
|
||
<li><a class="reference internal" href="#attributes">Attributes</a><ul>
|
||
<li><a class="reference internal" href="#action_space"><code class="docutils literal notranslate"><span class="pre">action_space</span></code></a></li>
|
||
<li><a class="reference internal" href="#observation_space"><code class="docutils literal notranslate"><span class="pre">observation_space</span></code></a></li>
|
||
<li><a class="reference internal" href="#single_action_space"><code class="docutils literal notranslate"><span class="pre">single_action_space</span></code></a></li>
|
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<li><a class="reference internal" href="#single_observation_space"><code class="docutils literal notranslate"><span class="pre">single_observation_space</span></code></a></li>
|
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</ul>
|
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</li>
|
||
</ul>
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</li>
|
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<li><a class="reference internal" href="#making-vector-environments">Making Vector Environments</a><ul>
|
||
<li><a class="reference internal" href="#gymnasium.vector.make"><code class="docutils literal notranslate"><span class="pre">make()</span></code></a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#async-vector-env">Async Vector Env</a><ul>
|
||
<li><a class="reference internal" href="#gymnasium.vector.AsyncVectorEnv"><code class="docutils literal notranslate"><span class="pre">AsyncVectorEnv</span></code></a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#sync-vector-env">Sync Vector Env</a><ul>
|
||
<li><a class="reference internal" href="#gymnasium.vector.SyncVectorEnv"><code class="docutils literal notranslate"><span class="pre">SyncVectorEnv</span></code></a></li>
|
||
</ul>
|
||
</li>
|
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</ul>
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</li>
|
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|
||
closeBtn.innerHTML = `<?xml version="1.0" ?><svg viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg"><defs><style>.cls-1{fill:none;stroke:#000;stroke-linecap:round;stroke-linejoin:round;stroke-width:2px;}</style></defs><title/><g id="cross"><line class="cls-1" x1="7" x2="25" y1="7" y2="25"/><line class="cls-1" x1="7" x2="25" y1="25" y2="7"/></g></svg>`
|
||
closeBtn.onclick = () => {
|
||
localStorage.setItem("shownCookieAlert", "true");
|
||
boxElem.style.display = "none";
|
||
}
|
||
containerElem.appendChild(closeBtn);
|
||
boxElem.appendChild(containerElem);
|
||
document.body.appendChild(boxElem);
|
||
}
|
||
})()
|
||
</script>
|
||
|
||
<script async src="https://www.googletagmanager.com/gtag/js?id=G-6H9C8TWXZ8"></script>
|
||
<script>
|
||
window.dataLayer = window.dataLayer || [];
|
||
function gtag(){dataLayer.push(arguments);}
|
||
gtag('js', new Date());
|
||
|
||
gtag('config', 'G-6H9C8TWXZ8');
|
||
</script>
|
||
|
||
<script data-url_root="../../" id="documentation_options" src="../../_static/documentation_options.js"></script>
|
||
<script src="../../_static/jquery.js"></script>
|
||
<script src="../../_static/underscore.js"></script>
|
||
<script src="../../_static/_sphinx_javascript_frameworks_compat.js"></script>
|
||
<script src="../../_static/doctools.js"></script>
|
||
<script src="../../_static/sphinx_highlight.js"></script>
|
||
<script src="../../_static/scripts/furo.js"></script>
|
||
|
||
<script>
|
||
const versioningConfig = {
|
||
githubUser: 'Farama-Foundation',
|
||
githubRepo: 'Gymnasium',
|
||
};
|
||
fetch('/_static/versioning/versioning_menu.html').then(response => {
|
||
if (response.status === 200) {
|
||
response.text().then(text => {
|
||
const container = document.createElement("div");
|
||
container.innerHTML = text;
|
||
document.querySelector("body").appendChild(container);
|
||
// innerHtml doenst evaluate scripts, we need to add them dynamically
|
||
Array.from(container.querySelectorAll("script")).forEach(oldScript => {
|
||
const newScript = document.createElement("script");
|
||
Array.from(oldScript.attributes).forEach(attr => newScript.setAttribute(attr.name, attr.value));
|
||
newScript.appendChild(document.createTextNode(oldScript.innerHTML));
|
||
oldScript.parentNode.replaceChild(newScript, oldScript);
|
||
});
|
||
});
|
||
} else {
|
||
console.warn("Unable to load versioning menu", response);
|
||
}
|
||
});
|
||
</script></body>
|
||
</html> |