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<section id="v0-22-release-notes">
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<h1>v0.22 Release Notes<a class="headerlink" href="#v0-22-release-notes" title="Permalink to this heading">#</a></h1>
|
||
<p>This release represents the largest set of changes ever to Gym, and represents a huge step towards the plans for 1.0 outlined here: <a class="reference external" href="https://github.com/openai/gym/pull/2524">#2524</a></p>
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<p>Gym now has a new comprehensive documentation site: https://www.gymlibrary.ml/ !</p>
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<section id="api-changes">
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<h2>API changes<a class="headerlink" href="#api-changes" title="Permalink to this heading">#</a></h2>
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<ul class="simple">
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||
<li><p><code class="docutils literal notranslate"><span class="pre">Env.reset</span></code> now accepts three new arguments:</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">options</span></code>: Usable for things like controlling curriculum learning without reinitializing the environment, which can be expensive (<a class="reference external" href="https://github.com/RedTachyon">@RedTachyon</a>)</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">seed</span></code>: Environment seeds can be passed to this reset argument in the future. The old <code class="docutils literal notranslate"><span class="pre">.seed()</span></code> method is being deprecated in favor of this, though it will continue to function as before until the 1.0 release for backwards compatibility purposes (<a class="reference external" href="https://github.com/RedTachyon">@RedTachyon</a>)</p></li>
|
||
<li><p><code class="docutils literal notranslate"><span class="pre">return_info</span></code>: when set to <code class="docutils literal notranslate"><span class="pre">True</span></code>, reset will return obs, info. This currently defaults to <code class="docutils literal notranslate"><span class="pre">False</span></code>, but will become the default behavior in Gym 1.0 (<a class="reference external" href="https://github.com/RedTachyon">@RedTachyon</a>)</p></li>
|
||
<li><p>Environment names no longer require a version during registration and will suggest intelligent similar names (<a class="reference external" href="https://github.com/kir0ul">@kir0ul</a>, <a class="reference external" href="https://github.com/JesseFarebro">@JesseFarebro</a>)</p></li>
|
||
<li><p>Vector environments now support terminal_observation in <code class="docutils literal notranslate"><span class="pre">info</span></code> and support batch action spaces (<a class="reference external" href="https://github.com/vwxyzjn">@vwxyzjn</a>, <a class="reference external" href="https://github.com/tristandeleu">@tristandeleu</a>)</p></li>
|
||
</ul>
|
||
</section>
|
||
<section id="environment-changes">
|
||
<h2>Environment changes<a class="headerlink" href="#environment-changes" title="Permalink to this heading">#</a></h2>
|
||
<ul class="simple">
|
||
<li><p>The blackjack and frozen lake toy_text environments now have nice graphical rendering using PyGame (<a class="reference external" href="https://github.com/1b15">@1b15</a>)</p></li>
|
||
<li><p>Moved robotics environments to gym-robotics package (<a class="reference external" href="https://github.com/seungjaeryanlee">@seungjaeryanlee</a>, <a class="reference external" href="https://github.com/Rohan138">@Rohan138</a>, <a class="reference external" href="https://github.com/vwxyzjn">@vwxyzjn</a>) (per discussion in <a class="reference external" href="https://github.com/openai/gym/pull/2456">#2456</a> (comment))</p></li>
|
||
<li><p>The bipedal walker and lunar lander environments were consolidated into one class (<a class="reference external" href="https://github.com/andrewtanJS">@andrewtanJS</a>)</p></li>
|
||
<li><p>Atari environments now use standard seeding API (<a class="reference external" href="https://github.com/JesseFarebro">@JesseFarebro</a>)</p></li>
|
||
<li><p>Fixed large bug fixes in car_racing box2d environment, bumped version (<a class="reference external" href="https://github.com/carlosluis">@carlosluis</a>, <a class="reference external" href="https://github.com/araffin">@araffin</a>)</p></li>
|
||
<li><p>Refactored all box2d and classic_control environments to use PyGame instead of Pyglet as issues with pyglet has been one of the most frequent sources of GitHub issues over the life of the gym project (<a class="reference external" href="https://github.com/andrewtanJS">@andrewtanJS</a>)</p></li>
|
||
</ul>
|
||
</section>
|
||
<section id="other-changes">
|
||
<h2>Other changes<a class="headerlink" href="#other-changes" title="Permalink to this heading">#</a></h2>
|
||
<ul class="simple">
|
||
<li><p>Removed DiscreteEnv class, built in environments no longer use it (<a class="reference external" href="https://github.com/carlosluis">@carlosluis</a>)</p></li>
|
||
<li><p>Large numbers of type hints added (<a class="reference external" href="https://github.com/ikamensh">@ikamensh</a>, <a class="reference external" href="https://github.com/RedTachyon">@RedTachyon</a>)</p></li>
|
||
<li><p>Python 3.10 support</p></li>
|
||
<li><p>Tons of additional code refactoring, cleanup, error message improvements and small bug fixes (<a class="reference external" href="https://github.com/vwxyzjn">@vwxyzjn</a>, <a class="reference external" href="https://github.com/Markus28">@Markus28</a>, <a class="reference external" href="https://github.com/RushivArora">@RushivArora</a>, <a class="reference external" href="https://github.com/jjshoots">@jjshoots</a>, <a class="reference external" href="https://github.com/XuehaiPan">@XuehaiPan</a>, <a class="reference external" href="https://github.com/Rohan138">@Rohan138</a>, <a class="reference external" href="https://github.com/JesseFarebro">@JesseFarebro</a>, <a class="reference external" href="https://github.com/Ericonaldo">@Ericonaldo</a>, <a class="reference external" href="https://github.com/AdilZouitine">@AdilZouitine</a>, <a class="reference external" href="https://github.com/RedTachyon">@RedTachyon</a>)</p></li>
|
||
<li><p>All environment files now have dramatically improved readmes at the top (that the documentation website automatically pulls from)</p></li>
|
||
<li><p>As part of the seeding changes, Gym’s RNG has been modified to use the <code class="docutils literal notranslate"><span class="pre">np.random.Generator</span></code> as the RandomState API has been deprecated. The methods <code class="docutils literal notranslate"><span class="pre">randint</span></code>, <code class="docutils literal notranslate"><span class="pre">rand</span></code>, <code class="docutils literal notranslate"><span class="pre">randn</span></code> are replaced by <code class="docutils literal notranslate"><span class="pre">integers</span></code>, <code class="docutils literal notranslate"><span class="pre">random</span></code> and <code class="docutils literal notranslate"><span class="pre">standard_normal</span></code> respectively. As a consequence, the random number generator has changed from <code class="docutils literal notranslate"><span class="pre">MT19937</span></code> to <code class="docutils literal notranslate"><span class="pre">PCG64</span></code>.</p></li>
|
||
</ul>
|
||
<p><strong>Full Changelog</strong>: https://github.com/openai/gym/compare/v0.21.0…0.22.0</p>
|
||
<p><strong>Github Release</strong>: https://github.com/openai/gym/releases/tag/0.22.0</p>
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