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<p class="caption" role="heading"><span class="caption-text">Introduction</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="introduction/basic_usage/">Basic Usage</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/train_agent/">Training an Agent</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/create_custom_env/">Create a Custom Environment</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/record_agent/">Recording Agents</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/speed_up_env/">Speeding Up Training</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/gym_compatibility/">Compatibility with Gym</a></li>
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<li class="toctree-l1"><a class="reference internal" href="introduction/migration_guide/">Migration Guide - v0.21 to v1.0.0</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api/env/">Env</a></li>
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<li class="toctree-l2"><a class="reference internal" href="api/wrappers/misc_wrappers/">Misc Wrappers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="api/wrappers/reward_wrappers/">Reward Wrappers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="api/vector/async_vector_env/">AsyncVectorEnv</a></li>
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<li class="toctree-l2"><a class="reference internal" href="api/vector/sync_vector_env/">SyncVectorEnv</a></li>
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<li class="toctree-l2"><a class="reference internal" href="api/vector/utils/">Utility functions</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api/utils/">Utility functions</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api/functional/">Functional Env</a></li>
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<p class="caption" role="heading"><span class="caption-text">Environments</span></p>
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<li class="toctree-l1 has-children"><a class="reference internal" href="environments/classic_control/">Classic Control</a><input class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" role="switch" type="checkbox"/><label for="toctree-checkbox-4"><div class="visually-hidden">Toggle navigation of Classic Control</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
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<p class="caption" role="heading"><span class="caption-text">Tutorials</span></p>
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<ul>
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<li class="toctree-l1 has-children"><a class="reference internal" href="tutorials/gymnasium_basics/">Gymnasium Basics</a><input class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" role="switch" type="checkbox"/><label for="toctree-checkbox-9"><div class="visually-hidden">Toggle navigation of Gymnasium Basics</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/gymnasium_basics/load_quadruped_model/">Load custom quadruped robot environments</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/gymnasium_basics/handling_time_limits/">Handling Time Limits</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/gymnasium_basics/implementing_custom_wrappers/">Implementing Custom Wrappers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/gymnasium_basics/environment_creation/">Make your own custom environment</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/gymnasium_basics/vector_envs_tutorial/">Training A2C with Vector Envs and Domain Randomization</a></li>
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<li class="toctree-l1 has-children"><a class="reference internal" href="tutorials/training_agents/">Training Agents</a><input class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" role="switch" type="checkbox"/><label for="toctree-checkbox-10"><div class="visually-hidden">Toggle navigation of Training Agents</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/training_agents/reinforce_invpend_gym_v26/">Training using REINFORCE for Mujoco</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/training_agents/blackjack_tutorial/">Solving Blackjack with Q-Learning</a></li>
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<li class="toctree-l2"><a class="reference internal" href="tutorials/training_agents/FrozenLake_tuto/">Frozenlake benchmark</a></li>
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<li class="toctree-l1"><a class="reference internal" href="tutorials/third-party-tutorials/">Third-Party Tutorials</a></li>
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<li class="toctree-l1"><a class="reference external" href="https://www.comet.com/docs/v2/integrations/ml-frameworks/gymnasium/?utm_source=gymnasium&utm_medium=partner&utm_campaign=partner_gymnasium_2023&utm_content=docs_gymnasium">Comet Tutorial</a></li>
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<p class="caption" role="heading"><span class="caption-text">Development</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference external" href="https://github.com/Farama-Foundation/Gymnasium">Github</a></li>
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<li class="toctree-l1"><a class="reference internal" href="gymnasium_release_notes/">Gymnasium Release Notes</a></li>
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<li class="toctree-l1"><a class="reference internal" href="gym_release_notes/">Gym Release Notes</a></li>
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<li class="toctree-l1"><a class="reference external" href="https://github.com/Farama-Foundation/Gymnasium/blob/main/docs/README.md">Contribute to the Docs</a></li>
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<p><strong>Gymnasium is a maintained fork of OpenAI’s Gym library.</strong> The Gymnasium interface is simple, pythonic, and capable of representing general RL problems, and has a <a class="reference internal" href="introduction/gym_compatibility/"><span class="doc std std-doc">compatibility wrapper</span></a> for old Gym environments:</p>
|
||
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">gymnasium</span> <span class="k">as</span> <span class="nn">gym</span>
|
||
|
||
<span class="c1"># Initialise the environment</span>
|
||
<span class="n">env</span> <span class="o">=</span> <span class="n">gym</span><span class="o">.</span><span class="n">make</span><span class="p">(</span><span class="s2">"LunarLander-v3"</span><span class="p">,</span> <span class="n">render_mode</span><span class="o">=</span><span class="s2">"human"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Reset the environment to generate the first observation</span>
|
||
<span class="n">observation</span><span class="p">,</span> <span class="n">info</span> <span class="o">=</span> <span class="n">env</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="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1000</span><span class="p">):</span>
|
||
<span class="c1"># this is where you would insert your policy</span>
|
||
<span class="n">action</span> <span class="o">=</span> <span class="n">env</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="c1"># step (transition) through the environment with the action</span>
|
||
<span class="c1"># receiving the next observation, reward and if the episode has terminated or truncated</span>
|
||
<span class="n">observation</span><span class="p">,</span> <span class="n">reward</span><span class="p">,</span> <span class="n">terminated</span><span class="p">,</span> <span class="n">truncated</span><span class="p">,</span> <span class="n">info</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">step</span><span class="p">(</span><span class="n">action</span><span class="p">)</span>
|
||
|
||
<span class="c1"># If the episode has ended then we can reset to start a new episode</span>
|
||
<span class="k">if</span> <span class="n">terminated</span> <span class="ow">or</span> <span class="n">truncated</span><span class="p">:</span>
|
||
<span class="n">observation</span><span class="p">,</span> <span class="n">info</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
|
||
|
||
<span class="n">env</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
|
||
</pre></div>
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