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Feat: added method get_distribution for class ActorCriticPolicy #564

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2b2ae66
feat: get_distribution method for ActorCriticPolicy
cyprienc Sep 11, 2021
83e2cf5
doc: updating changelog.rst
cyprienc Sep 11, 2021
c3eadba
style: make format
cyprienc Sep 11, 2021
8a9c1d4
fix: updating version.txt
cyprienc Sep 11, 2021
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27 changes: 26 additions & 1 deletion docs/misc/changelog.rst
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Expand Up @@ -4,6 +4,31 @@ Changelog
==========


Release 1.2.1a0 (WIP)
---------------------------


Breaking Changes:
^^^^^^^^^^^^^^^^^

New Features:
^^^^^^^^^^^^^
- Added method `get_distribution` for `ActorCriticPolicy` (@cyprienc)
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@araffin araffin Sep 11, 2021

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Suggested change
- Added method `get_distribution` for `ActorCriticPolicy` (@cyprienc)
- Added method `get_distribution` for ``ActorCriticPolicy`` (@cyprienc)


Bug Fixes:
^^^^^^^^^^

Deprecations:
^^^^^^^^^^^^^

Others:
^^^^^^^

Documentation:
^^^^^^^^^^^^^^



Release 1.2.0 (2021-09-03)
---------------------------

Expand Down Expand Up @@ -746,4 +771,4 @@ And all the contributors:
@diditforlulz273 @liorcohen5 @ManifoldFR @mloo3 @SwamyDev @wmmc88 @megan-klaiber @thisray
@tfederico @hn2 @LucasAlegre @AptX395 @zampanteymedio @JadenTravnik @decodyng @ardabbour @lorenz-h @mschweizer @lorepieri8 @vwxyzjn
@ShangqunYu @PierreExeter @JacopoPan @ltbd78 @tom-doerr @Atlis @liusida @09tangriro @amy12xx @juancroldan @benblack769 @bstee615
@c-rizz @skandermoalla @MihaiAnca13 @davidblom603 @ayeright
@c-rizz @skandermoalla @MihaiAnca13 @davidblom603 @ayeright @cyprienc
10 changes: 10 additions & 0 deletions stable_baselines3/common/policies.py
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Expand Up @@ -664,6 +664,16 @@ def evaluate_actions(self, obs: th.Tensor, actions: th.Tensor) -> Tuple[th.Tenso
values = self.value_net(latent_vf)
return values, log_prob, distribution.entropy()

def get_distribution(self, obs: th.Tensor) -> Distribution:
"""
Get the current policy distribution given the observations.

:param obs:
:return: the action distribution.
"""
latent_pi, _, latent_sde = self._get_latent(obs)
return self._get_action_dist_from_latent(latent_pi, latent_sde)


class ActorCriticCnnPolicy(ActorCriticPolicy):
"""
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2 changes: 1 addition & 1 deletion stable_baselines3/version.txt
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@@ -1 +1 @@
1.2.0
1.2.1a0