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< p class = "caption" role = "heading" > < span class = "caption-text" > Introduction< / span > < / p >
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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-l2" > < a class = "reference internal" href = "../../spaces/fundamental/" > Fundamental Spaces< / a > < / li >
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< li class = "toctree-l1 current has-children" > < a class = "reference internal" href = "../" > Wrappers< / a > < input checked = "" class = "toctree-checkbox" id = "toctree-checkbox-2" name = "toctree-checkbox-2" role = "switch" type = "checkbox" / > < label for = "toctree-checkbox-2" > < div class = "visually-hidden" > Toggle navigation of Wrappers< / div > < i class = "icon" > < svg > < use href = "#svg-arrow-right" > < / use > < / svg > < / i > < / label > < ul class = "current" >
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< li class = "toctree-l2" > < a class = "reference internal" href = "../table/" > List of Wrappers< / a > < / li >
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< li class = "toctree-l1 has-children" > < a class = "reference internal" href = "../../vector/" > Vectorize< / a > < input class = "toctree-checkbox" id = "toctree-checkbox-3" name = "toctree-checkbox-3" role = "switch" type = "checkbox" / > < label for = "toctree-checkbox-3" > < div class = "visually-hidden" > Toggle navigation of Vectorize< / 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 = "../../../environments/box2d/car_racing/" > Car Racing< / a > < / li >
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< / ul >
< / li >
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< li class = "toctree-l1 has-children" > < a class = "reference internal" href = "../../../environments/toy_text/" > Toy Text< / a > < input class = "toctree-checkbox" id = "toctree-checkbox-6" name = "toctree-checkbox-6" role = "switch" type = "checkbox" / > < label for = "toctree-checkbox-6" > < div class = "visually-hidden" > Toggle navigation of Toy Text< / 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 = "../../../environments/toy_text/blackjack/" > Blackjack< / a > < / li >
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< li class = "toctree-l2" > < a class = "reference internal" href = "../../../environments/toy_text/cliff_walking/" > Cliff Walking< / a > < / li >
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< / ul >
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< / li >
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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/implementing_custom_wrappers/" > Implementing Custom Wrappers< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "../../../tutorials/gymnasium_basics/environment_creation/" > Make your own custom environment< / a > < / li >
< 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 >
< / ul >
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< li class = "toctree-l1" > < a class = "reference external" href = "https://arxiv.org/abs/2407.17032" > Paper< / 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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< section class = "tex2jax_ignore mathjax_ignore" id = "action-wrappers" >
< h1 > Action Wrappers< a class = "headerlink" href = "#action-wrappers" title = "Link to this heading" > ¶< / a > < / h1 >
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< section id = "base-class" >
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< h2 > Base Class< a class = "headerlink" href = "#base-class" title = "Link to this heading" > ¶< / a > < / h2 >
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< dl class = "py class" >
< dt class = "sig sig-object py" id = "gymnasium.ActionWrapper" >
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< em class = "property" > < span class = "pre" > class< / span > < span class = "w" > < / span > < / em > < span class = "sig-prename descclassname" > < span class = "pre" > gymnasium.< / span > < / span > < span class = "sig-name descname" > < span class = "pre" > ActionWrapper< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > env< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < 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 = "pre" > ObsType< / span > < span class = "p" > < span class = "pre" > ,< / span > < / span > < span class = "w" > < / span > < span class = "pre" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < / span > < / em > < span class = "sig-paren" > )< / span > < a class = "reference internal" href = "../../../_modules/gymnasium/core/#ActionWrapper" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.ActionWrapper" title = "Link to this definition" > ¶< / a > < / dt >
< dd > < p > Superclass of wrappers that can modify the action before < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > step()< / span > < / code > .< / p >
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< p > If you would like to apply a function to the action before passing it to the base environment,
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you can simply inherit from < a class = "reference internal" href = "#gymnasium.ActionWrapper" title = "gymnasium.ActionWrapper" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > ActionWrapper< / span > < / code > < / a > and overwrite the method < a class = "reference internal" href = "#gymnasium.ActionWrapper.action" title = "gymnasium.ActionWrapper.action" > < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > action()< / span > < / code > < / a > to implement
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that transformation. The transformation defined in that method must take values in the base environment’
action space. However, its domain might differ from the original action space.
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In that case, you need to specify the new action space of the wrapper by setting < code class = "xref py py-attr docutils literal notranslate" > < span class = "pre" > action_space< / span > < / code > in
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the < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > __init__()< / span > < / code > method of your wrapper.< / p >
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< p > Among others, Gymnasium provides the action wrappers < a class = "reference internal" href = "#gymnasium.wrappers.ClipAction" title = "gymnasium.wrappers.ClipAction" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > gymnasium.wrappers.ClipAction< / span > < / code > < / a > and
< a class = "reference internal" href = "#gymnasium.wrappers.RescaleAction" title = "gymnasium.wrappers.RescaleAction" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > gymnasium.wrappers.RescaleAction< / span > < / code > < / a > for clipping and rescaling actions.< / p >
< dl class = "field-list simple" >
< dt class = "field-odd" > Parameters< span class = "colon" > :< / span > < / dt >
< dd class = "field-odd" > < p > < strong > env< / strong > – < / p >
< / dd >
< / dl >
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< dl class = "py method" >
< dt class = "sig sig-object py" id = "gymnasium.ActionWrapper.action" >
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< span class = "sig-name descname" > < span class = "pre" > action< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > action< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > WrapperActType< / span > < / span > < / em > < span class = "sig-paren" > )< / span > < span class = "sig-return" > < span class = "sig-return-icon" > → < / span > < span class = "sig-return-typehint" > < span class = "pre" > ActType< / span > < / span > < / span > < a class = "reference internal" href = "../../../_modules/gymnasium/core/#ActionWrapper.action" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.ActionWrapper.action" title = "Link to this definition" > ¶< / a > < / dt >
< dd > < p > Returns a modified action before < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > step()< / span > < / code > is called.< / p >
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< dl class = "field-list simple" >
< dt class = "field-odd" > Parameters< span class = "colon" > :< / span > < / dt >
< dd class = "field-odd" > < p > < strong > action< / strong > – < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > step()< / span > < / code > actions< / p >
< / dd >
< dt class = "field-even" > Returns< span class = "colon" > :< / span > < / dt >
< dd class = "field-even" > < p > < strong > The modified actions< / strong > < / p >
< / dd >
< / dl >
< / dd > < / dl >
< / dd > < / dl >
< / section >
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< section id = "available-action-wrappers" >
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< h2 > Available Action Wrappers< a class = "headerlink" href = "#available-action-wrappers" title = "Link to this heading" > ¶< / a > < / h2 >
< dl class = "py class" >
< dt class = "sig sig-object py" id = "gymnasium.wrappers.TransformAction" >
< em class = "property" > < span class = "pre" > class< / span > < span class = "w" > < / span > < / em > < span class = "sig-prename descclassname" > < span class = "pre" > gymnasium.wrappers.< / span > < / span > < span class = "sig-name descname" > < span class = "pre" > TransformAction< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > env< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > gym.Env< / 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" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < / span > < / em > , < em class = "sig-param" > < span class = "n" > < span class = "pre" > func< / 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" > WrapperActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < span class = "p" > < span class = "pre" > ,< / span > < / span > < span class = "w" > < / span > < span class = "pre" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / 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" > < a class = "reference internal" href = "../../spaces/#gymnasium.spaces.Space" title = "gymnasium.spaces.Space" > < span class = "pre" > Space< / span > < / a > < span class = "p" > < span class = "pre" > [< / span > < / span > < span class = "pre" > WrapperActType< / 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 > < / em > < span class = "sig-paren" > )< / span > < a class = "reference internal" href = "../../../_modules/gymnasium/wrappers/transform_action/#TransformAction" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.wrappers.TransformAction" title = "Link to this definition" > ¶< / a > < / dt >
< dd > < p > Applies a function to the < code class = "docutils literal notranslate" > < span class = "pre" > action< / span > < / code > before passing the modified value to the environment < code class = "docutils literal notranslate" > < span class = "pre" > step< / span > < / code > function.< / p >
< p > A vector version of the wrapper exists < a class = "reference internal" href = "../../vector/wrappers/#gymnasium.wrappers.vector.TransformAction" title = "gymnasium.wrappers.vector.TransformAction" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > gymnasium.wrappers.vector.TransformAction< / span > < / code > < / a > .< / p >
< p class = "rubric" > Example< / p >
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< div class = "doctest highlight-default notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "gp" > > > > < / span > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "nn" > numpy< / span > < span class = "w" > < / span > < span class = "k" > as< / span > < span class = "w" > < / span > < span class = "nn" > np< / span >
< span class = "gp" > > > > < / 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 >
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< 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" > make< / span > < span class = "p" > (< / span > < span class = "s2" > " MountainCarContinuous-v0" < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > _< / 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" > 123< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > obs< / span > < span class = "p" > ,< / span > < span class = "o" > *< / span > < span class = "n" > _< / 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" > np< / span > < span class = "o" > .< / span > < span class = "n" > array< / span > < span class = "p" > ([< / span > < span class = "mf" > 0.0< / span > < span class = "p" > ,< / span > < span class = "mf" > 1.0< / span > < span class = "p" > ]))< / span >
< span class = "gp" > > > > < / span > < span class = "n" > obs< / span >
< span class = "go" > array([-4.6397772e-01, -4.4808415e-04], dtype=float32)< / 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" > make< / span > < span class = "p" > (< / span > < span class = "s2" > " MountainCarContinuous-v0" < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > =< / span > < span class = "n" > TransformAction< / span > < span class = "p" > (< / span > < span class = "n" > env< / span > < span class = "p" > ,< / span > < span class = "k" > lambda< / span > < span class = "n" > a< / span > < span class = "p" > :< / span > < span class = "mf" > 0.5< / span > < span class = "o" > *< / span > < span class = "n" > a< / span > < span class = "o" > +< / span > < span class = "mf" > 0.1< / span > < span class = "p" > ,< / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > action_space< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > _< / 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" > 123< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > obs< / span > < span class = "p" > ,< / span > < span class = "o" > *< / span > < span class = "n" > _< / 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" > np< / span > < span class = "o" > .< / span > < span class = "n" > array< / span > < span class = "p" > ([< / span > < span class = "mf" > 0.0< / span > < span class = "p" > ,< / span > < span class = "mf" > 1.0< / span > < span class = "p" > ]))< / span >
< span class = "gp" > > > > < / span > < span class = "n" > obs< / span >
< span class = "go" > array([-4.6382770e-01, -2.9808417e-04], dtype=float32)< / span >
< / pre > < / div >
< / div >
< dl class = "simple" >
< dt > Change logs:< / dt > < dd > < ul class = "simple" >
< li > < p > v1.0.0 - Initially added< / p > < / li >
< / ul >
< / dd >
< / dl >
< 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< / strong > – < / p > < / li >
< li > < p > < strong > func< / strong > – < code class = "xref py py-meth docutils literal notranslate" > < span class = "pre" > step()< / span > < / code > ’ < code class = "docutils literal notranslate" > < span class = "pre" > action< / span > < / code > < / p > < / li >
< li > < p > < strong > action_space< / strong > – < / p > < / li >
< / ul >
< / dd >
< / dl >
< / dd > < / dl >
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< dl class = "py class" >
< dt class = "sig sig-object py" id = "gymnasium.wrappers.ClipAction" >
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< em class = "property" > < span class = "pre" > class< / span > < span class = "w" > < / span > < / em > < span class = "sig-prename descclassname" > < span class = "pre" > gymnasium.wrappers.< / span > < / span > < span class = "sig-name descname" > < span class = "pre" > ClipAction< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > env< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < 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 = "pre" > ObsType< / span > < span class = "p" > < span class = "pre" > ,< / span > < / span > < span class = "w" > < / span > < span class = "pre" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < / span > < / em > < span class = "sig-paren" > )< / span > < a class = "reference internal" href = "../../../_modules/gymnasium/wrappers/transform_action/#ClipAction" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.wrappers.ClipAction" title = "Link to this definition" > ¶< / a > < / dt >
< dd > < p > Clips the < code class = "docutils literal notranslate" > < span class = "pre" > action< / span > < / code > pass to < code class = "docutils literal notranslate" > < span class = "pre" > step< / span > < / code > to be within the environment’ < cite > action_space< / cite > .< / p >
< p > A vector version of the wrapper exists < a class = "reference internal" href = "../../vector/wrappers/#gymnasium.wrappers.vector.ClipAction" title = "gymnasium.wrappers.vector.ClipAction" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > gymnasium.wrappers.vector.ClipAction< / span > < / code > < / a > .< / p >
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< p class = "rubric" > Example< / p >
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< div class = "doctest highlight-default notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "gp" > > > > < / 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" > > > > < / span > < span class = "kn" > from< / span > < span class = "w" > < / span > < span class = "nn" > gymnasium.wrappers< / span > < span class = "w" > < / span > < span class = "kn" > import< / span > < span class = "n" > ClipAction< / span >
< span class = "gp" > > > > < / span > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "nn" > numpy< / span > < span class = "w" > < / span > < span class = "k" > as< / span > < span class = "w" > < / span > < span class = "nn" > np< / span >
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< 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" > make< / span > < span class = "p" > (< / span > < span class = "s2" > " Hopper-v4" < / span > < span class = "p" > ,< / span > < span class = "n" > disable_env_checker< / span > < span class = "o" > =< / span > < span class = "kc" > True< / span > < span class = "p" > )< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > =< / span > < span class = "n" > ClipAction< / span > < span class = "p" > (< / span > < span class = "n" > env< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > action_space< / span >
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< span class = "go" > Box(-inf, inf, (3,), float32)< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > _< / 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 >
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< span class = "gp" > > > > < / span > < span class = "n" > _< / 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" > np< / span > < span class = "o" > .< / span > < span class = "n" > array< / span > < span class = "p" > ([< / span > < span class = "mf" > 5.0< / span > < span class = "p" > ,< / span > < span class = "o" > -< / span > < span class = "mf" > 2.0< / span > < span class = "p" > ,< / span > < span class = "mf" > 0.0< / span > < span class = "p" > ],< / span > < span class = "n" > dtype< / span > < span class = "o" > =< / span > < span class = "n" > np< / span > < span class = "o" > .< / span > < span class = "n" > float32< / span > < span class = "p" > ))< / span >
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< span class = "gp" > ... < / span > < span class = "c1" > # Executes the action np.array([1.0, -1.0, 0]) in the base environment< / span >
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< / pre > < / div >
< / div >
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< dl class = "simple" >
< dt > Change logs:< / dt > < dd > < ul class = "simple" >
< li > < p > v0.12.6 - Initially added< / p > < / li >
< li > < p > v1.0.0 - Action space is updated to infinite bounds as is technically correct< / p > < / li >
< / ul >
< / dd >
< / dl >
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< dl class = "field-list simple" >
< dt class = "field-odd" > Parameters< span class = "colon" > :< / span > < / dt >
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< dd class = "field-odd" > < p > < strong > env< / strong > – < / p >
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< / dd >
< / dl >
< / dd > < / dl >
< dl class = "py class" >
< dt class = "sig sig-object py" id = "gymnasium.wrappers.RescaleAction" >
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< em class = "property" > < span class = "pre" > class< / span > < span class = "w" > < / span > < / em > < span class = "sig-prename descclassname" > < span class = "pre" > gymnasium.wrappers.< / span > < / span > < span class = "sig-name descname" > < span class = "pre" > RescaleAction< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > env< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > gym.Env< / 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" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < / span > < / em > , < em class = "sig-param" > < span class = "n" > < span class = "pre" > min_action< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > np.floating< / span > < span class = "w" > < / span > < span class = "p" > < span class = "pre" > |< / span > < / span > < span class = "w" > < / span > < span class = "pre" > np.integer< / span > < span class = "w" > < / span > < span class = "p" > < span class = "pre" > |< / span > < / span > < span class = "w" > < / span > < span class = "pre" > np.ndarray< / span > < / span > < / em > , < em class = "sig-param" > < span class = "n" > < span class = "pre" > max_action< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > np.floating< / span > < span class = "w" > < / span > < span class = "p" > < span class = "pre" > |< / span > < / span > < span class = "w" > < / span > < span class = "pre" > np.integer< / span > < span class = "w" > < / span > < span class = "p" > < span class = "pre" > |< / span > < / span > < span class = "w" > < / span > < span class = "pre" > np.ndarray< / span > < / span > < / em > < span class = "sig-paren" > )< / span > < a class = "reference internal" href = "../../../_modules/gymnasium/wrappers/transform_action/#RescaleAction" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.wrappers.RescaleAction" title = "Link to this definition" > ¶< / a > < / dt >
< dd > < p > Affinely (linearly) rescales a < code class = "docutils literal notranslate" > < span class = "pre" > Box< / span > < / code > action space of the environment to within the range of < code class = "docutils literal notranslate" > < span class = "pre" > [min_action,< / span > < span class = "pre" > max_action]< / span > < / code > .< / p >
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< p > The base environment < code class = "xref py py-attr docutils literal notranslate" > < span class = "pre" > env< / span > < / code > must have an action space of type < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > spaces.Box< / span > < / code > . If < code class = "xref py py-attr docutils literal notranslate" > < span class = "pre" > min_action< / span > < / code >
or < code class = "xref py py-attr docutils literal notranslate" > < span class = "pre" > max_action< / span > < / code > are numpy arrays, the shape must match the shape of the environment’ < / p >
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< p > A vector version of the wrapper exists < a class = "reference internal" href = "../../vector/wrappers/#gymnasium.wrappers.vector.RescaleAction" title = "gymnasium.wrappers.vector.RescaleAction" > < code class = "xref py py-class docutils literal notranslate" > < span class = "pre" > gymnasium.wrappers.vector.RescaleAction< / span > < / code > < / a > .< / p >
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< p class = "rubric" > Example< / p >
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< div class = "doctest highlight-default notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "gp" > > > > < / 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" > > > > < / span > < span class = "kn" > from< / span > < span class = "w" > < / span > < span class = "nn" > gymnasium.wrappers< / span > < span class = "w" > < / span > < span class = "kn" > import< / span > < span class = "n" > RescaleAction< / span >
< span class = "gp" > > > > < / span > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "nn" > numpy< / span > < span class = "w" > < / span > < span class = "k" > as< / span > < span class = "w" > < / span > < span class = "nn" > np< / span >
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< 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" > make< / span > < span class = "p" > (< / span > < span class = "s2" > " Hopper-v4" < / span > < span class = "p" > ,< / span > < span class = "n" > disable_env_checker< / span > < span class = "o" > =< / span > < span class = "kc" > True< / span > < span class = "p" > )< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > _< / 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 >
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< span class = "gp" > > > > < / span > < span class = "n" > obs< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / 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" > 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" > 1< / span > < span class = "p" > ,< / span > < span class = "mi" > 1< / span > < span class = "p" > ],< / span > < span class = "n" > dtype< / span > < span class = "o" > =< / span > < span class = "n" > np< / span > < span class = "o" > .< / span > < span class = "n" > float32< / span > < span class = "p" > ))< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > _< / 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 >
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< span class = "gp" > > > > < / span > < span class = "n" > min_action< / span > < span class = "o" > =< / span > < span class = "o" > -< / span > < span class = "mf" > 0.5< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > max_action< / 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 = "mf" > 0.0< / span > < span class = "p" > ,< / span > < span class = "mf" > 0.5< / span > < span class = "p" > ,< / span > < span class = "mf" > 0.75< / span > < span class = "p" > ],< / span > < span class = "n" > dtype< / span > < span class = "o" > =< / span > < span class = "n" > np< / span > < span class = "o" > .< / span > < span class = "n" > float32< / span > < span class = "p" > )< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > wrapped_env< / span > < span class = "o" > =< / span > < span class = "n" > RescaleAction< / span > < span class = "p" > (< / span > < span class = "n" > env< / span > < span class = "p" > ,< / span > < span class = "n" > min_action< / span > < span class = "o" > =< / span > < span class = "n" > min_action< / span > < span class = "p" > ,< / span > < span class = "n" > max_action< / span > < span class = "o" > =< / span > < span class = "n" > max_action< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > wrapped_env_obs< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "p" > ,< / span > < span class = "n" > _< / span > < span class = "o" > =< / span > < span class = "n" > wrapped_env< / span > < span class = "o" > .< / span > < span class = "n" > step< / span > < span class = "p" > (< / span > < span class = "n" > max_action< / span > < span class = "p" > )< / span >
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< span class = "gp" > > > > < / span > < span class = "n" > np< / span > < span class = "o" > .< / span > < span class = "n" > all< / span > < span class = "p" > (< / span > < span class = "n" > obs< / span > < span class = "o" > ==< / span > < span class = "n" > wrapped_env_obs< / span > < span class = "p" > )< / span >
< span class = "go" > np.True_< / span >
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< / pre > < / div >
< / div >
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< dl class = "simple" >
< dt > Change logs:< / dt > < dd > < ul class = "simple" >
< li > < p > v0.15.4 - Initially added< / p > < / li >
< / ul >
< / dd >
< / dl >
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< dl class = "field-list simple" >
< dt class = "field-odd" > Parameters< span class = "colon" > :< / span > < / dt >
< dd class = "field-odd" > < ul class = "simple" >
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< li > < p > < strong > env< / strong > (< a class = "reference internal" href = "../../env/#gymnasium.Env" title = "gymnasium.Env" > < em > Env< / em > < / a > ) – < / p > < / li >
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< li > < p > < strong > min_action< / strong > (< em > float< / em > < em > , < / em > < em > int< / em > < em > or < / em > < em > np.ndarray< / em > ) – < / p > < / li >
< li > < p > < strong > max_action< / strong > (< em > float< / em > < em > , < / em > < em > int< / em > < em > or < / em > < em > np.ndarray< / em > ) – < / p > < / li >
< / ul >
< / dd >
< / dl >
< / dd > < / dl >
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< dl class = "py class" >
< dt class = "sig sig-object py" id = "gymnasium.wrappers.StickyAction" >
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< em class = "property" > < span class = "pre" > class< / span > < span class = "w" > < / span > < / em > < span class = "sig-prename descclassname" > < span class = "pre" > gymnasium.wrappers.< / span > < / span > < span class = "sig-name descname" > < span class = "pre" > StickyAction< / span > < / span > < span class = "sig-paren" > (< / span > < em class = "sig-param" > < span class = "n" > < span class = "pre" > env< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > gym.Env< / 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" > ActType< / span > < span class = "p" > < span class = "pre" > ]< / span > < / span > < / span > < / em > , < em class = "sig-param" > < span class = "n" > < span class = "pre" > repeat_action_probability< / span > < / span > < span class = "p" > < span class = "pre" > :< / span > < / span > < span class = "w" > < / span > < span class = "n" > < span class = "pre" > float< / span > < / span > < / em > , < em class = "sig-param" > < span class = "n" > < span class = "pre" > repeat_action_duration< / 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" > 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 = "pre" > int< / 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" > 1< / span > < / span > < / em > < span class = "sig-paren" > )< / span > < a class = "reference internal" href = "../../../_modules/gymnasium/wrappers/stateful_action/#StickyAction" > < span class = "viewcode-link" > < span class = "pre" > [source]< / span > < / span > < / a > < a class = "headerlink" href = "#gymnasium.wrappers.StickyAction" title = "Link to this definition" > ¶< / a > < / dt >
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< dd > < p > Adds a probability that the action is repeated for the same < code class = "docutils literal notranslate" > < span class = "pre" > step< / span > < / code > function.< / p >
< p > This wrapper follows the implementation proposed by < a class = "reference external" href = "https://arxiv.org/pdf/1709.06009.pdf" > Machado et al., 2018< / a >
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in Section 5.2 on page 12, and adds the possibility to repeat the action for
more than one step.< / p >
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< p > No vector version of the wrapper exists.< / p >
< p class = "rubric" > Example< / p >
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< div class = "doctest highlight-default notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "gp" > > > > < / 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 >
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< 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" > make< / span > < span class = "p" > (< / span > < span class = "s2" > " CartPole-v1" < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > =< / span > < span class = "n" > StickyAction< / span > < span class = "p" > (< / span > < span class = "n" > env< / span > < span class = "p" > ,< / span > < span class = "n" > repeat_action_probability< / span > < span class = "o" > =< / span > < span class = "mf" > 0.9< / 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 = "n" > seed< / span > < span class = "o" > =< / span > < span class = "mi" > 123< / span > < span class = "p" > )< / span >
< span class = "go" > (array([ 0.01823519, -0.0446179 , -0.02796401, -0.03156282], dtype=float32), {})< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > step< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< span class = "go" > (array([ 0.01734283, 0.15089367, -0.02859527, -0.33293587], dtype=float32), 1.0, False, False, {})< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > step< / span > < span class = "p" > (< / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span >
< span class = "go" > (array([ 0.0203607 , 0.34641072, -0.03525399, -0.6344974 ], dtype=float32), 1.0, False, False, {})< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > step< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< span class = "go" > (array([ 0.02728892, 0.5420062 , -0.04794393, -0.9380709 ], dtype=float32), 1.0, False, False, {})< / span >
< span class = "gp" > > > > < / span > < span class = "n" > env< / span > < span class = "o" > .< / span > < span class = "n" > step< / span > < span class = "p" > (< / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span >
< span class = "go" > (array([ 0.03812904, 0.34756234, -0.06670535, -0.6608303 ], dtype=float32), 1.0, False, False, {})< / span >
< / pre > < / div >
< / div >
< dl class = "simple" >
< dt > Change logs:< / dt > < dd > < ul class = "simple" >
< li > < p > v1.0.0 - Initially added< / p > < / li >
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< li > < p > v1.1.0 - Add < cite > repeat_action_duration< / cite > argument for dynamic number of sticky actions< / p > < / li >
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< / ul >
< / dd >
< / dl >
< dl class = "field-list simple" >
< dt class = "field-odd" > Parameters< span class = "colon" > :< / span > < / dt >
< dd class = "field-odd" > < ul class = "simple" >
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< li > < p > < strong > env< / strong > (< a class = "reference internal" href = "../../env/#gymnasium.Env" title = "gymnasium.Env" > < em > Env< / em > < / a > ) – < / p > < / li >
< li > < p > < strong > repeat_action_probability< / strong > (< em > int< / em > < em > | < / em > < em > float< / em > ) – < / p > < / li >
< li > < p > < strong > repeat_action_duration< / strong > (< em > int< / em > < em > | < / em > < em > tuple< / em > < em > [< / em > < em > int< / em > < em > , < / em > < em > int< / em > < em > ]< / em > ) –
the action is repeated. It can be either an int (for deterministic
repeats) or a tuple[int, int] for a range of stochastic number of repeats.< / p > < / li >
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< / ul >
< / dd >
< / dl >
< / dd > < / dl >
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< li > < a class = "reference internal" href = "#gymnasium.ActionWrapper" > < code class = "docutils literal notranslate" > < span class = "pre" > ActionWrapper< / span > < / code > < / a > < ul >
< li > < a class = "reference internal" href = "#gymnasium.ActionWrapper.action" > < code class = "docutils literal notranslate" > < span class = "pre" > ActionWrapper.action()< / span > < / code > < / a > < / li >
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< li > < a class = "reference internal" href = "#gymnasium.wrappers.TransformAction" > < code class = "docutils literal notranslate" > < span class = "pre" > TransformAction< / span > < / code > < / a > < / li >
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< li > < a class = "reference internal" href = "#gymnasium.wrappers.ClipAction" > < code class = "docutils literal notranslate" > < span class = "pre" > ClipAction< / span > < / code > < / a > < / li >
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< li > < a class = "reference internal" href = "#gymnasium.wrappers.RescaleAction" > < code class = "docutils literal notranslate" > < span class = "pre" > RescaleAction< / span > < / code > < / a > < / li >
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< li > < a class = "reference internal" href = "#gymnasium.wrappers.StickyAction" > < code class = "docutils literal notranslate" > < span class = "pre" > StickyAction< / span > < / code > < / a > < / li >
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)
subSectionElem.appendChild(Object.assign(document.createElement('span'),
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{
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className:'farama-header-menu__subsection-title' ,
innerText: subKey
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}
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))
const ulElem = createProjectsList(subSections[subKey], key !== 'Foundation');
subSectionElem.appendChild(ulElem);
subSectionContainerElem.appendChild(subSectionElem);
})
sectionElem.appendChild(subSectionContainerElem);
} else {
const projects = sections[key];
const ulElem = createProjectsList(projects, true);
sectionElem.appendChild(ulElem);
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}
menuContainer.appendChild(sectionElem)
});
}
xhr.onerror = function() {
console.error("Unable to load projects");
};
xhr.send();
< / script >
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< script >
const versioningConfig = {
githubUser: 'Farama-Foundation',
githubRepo: 'Gymnasium',
};
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fetch('/main/_static/versioning/versioning_menu.html').then(response => {
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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);
}
});
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< / script >
< / body >
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< / html >
