[dependabot]

Updates the requirements on gymnasium to permit the latest version.

Release notes

Sourced from gymnasium's releases.

v1.4.0

Gymnasium v1.4.0

This release adds max_concurrency to AsyncVectorEnv, support for arbitrary node and edge spaces in Graph, optional key sorting for Dict, generic typing for vector environments, and a large number of bug fixes across spaces, wrappers, vector environments and MuJoCo rendering.

New Features

• Added max_concurrency to AsyncVectorEnv to cap how many sub-environments run reset/step at once, reducing CPU oversubscription when the number of environments exceeds the number of cores. Also usable via gym.make_vec(..., vectorization_mode="async", vector_kwargs={"max_concurrency": N}) by @​lawliet206 (Farama-Foundation/Gymnasium#1673)
• Graph spaces now accept Dict and Tuple spaces for their node and edge spaces, enabling heterogeneous graphs and named node/edge features by @​2ToTheNthPower (Farama-Foundation/Gymnasium#1514)
• Added a keyword-only sort_keys argument to Dict spaces. It defaults to True (existing behaviour), while sort_keys=False preserves the insertion order of the keys, including through wrappers such as FrameStackObservation by @​quinnarnold (Farama-Foundation/Gymnasium#1675)
• VectorEnv, its subclasses and the vector wrappers are now generic types by @​pseudo-rnd-thoughts (Farama-Foundation/Gymnasium#1752)
• The environment checkers (check_env and the passive checker run by make) now verify that reset and step return distinct observation and info objects each timestep, preventing buffers being silently overwritten in replay/rollout buffers. This found and fixed two info elements in Humanoid and HumanoidStandup that reused the same buffer between timesteps by @​pseudo-rnd-thoughts (Farama-Foundation/Gymnasium#1683)

Bug Fixes

It seems that the agents have reached Gymnasium, so a large quantity of previously unknown bugs have been reported and resolved.

Spaces

• Fixed Discrete.contains and Box.contains raising OverflowError for integers outside the space's dtype range, they now return False by @​nikolauspschuetz (Farama-Foundation/Gymnasium#1648, Farama-Foundation/Gymnasium#1663)
• Fixed integer overflow in MultiDiscrete.contains for negative start values and small dtypes by @​teddytennant (Farama-Foundation/Gymnasium#1622)
• Fixed Box.sample never returning values near the limits of signed integer dtypes by @​shoutoutuoadi325 (Farama-Foundation/Gymnasium#1666)
• Fixed Text space charset ordering being non-deterministic under Python hash randomization, making seeded samples reproducible across processes by @​teddytennant (Farama-Foundation/Gymnasium#1626)
• Text spaces now reject charset elements that are more than one character long by @​adarshsm (Farama-Foundation/Gymnasium#1653)
• Fixed flatten and flatten_space disagreeing on the dtype of OneOf spaces, so FlattenObservation observations are contained in its observation space, and OneOf spaces containing Text can be flattened by @​teddytennant (Farama-Foundation/Gymnasium#1674)
• is_space_dtype_shape_equiv now requires Tuple spaces to have equal lengths, previously a shorter Tuple could be accepted (or an IndexError raised) by @​Doribelove (Farama-Foundation/Gymnasium#1694)

Wrappers

• Fixed several wrappers not recording all of their constructor arguments, meaning environments rebuilt with gym.make(env.spec) either raised a TypeError or silently used default arguments:
  • AddRenderObservation recorded stale argument names from PixelObservationWrapper by @​uttam12331 (Farama-Foundation/Gymnasium#1658)
  • DiscretizeAction, DiscretizeObservation, RecordEpisodeStatistics, RecordVideo and StickyAction by @​mkzung (Farama-Foundation/Gymnasium#1664)
  • ArrayConversion and its JaxToNumpy, JaxToTorch and NumpyToTorch subclasses by @​mkzung (Farama-Foundation/Gymnasium#1667)
• DiscretizeObservation and DiscretizeAction now support n-dimensional Box spaces by flattening them by @​teddytennant (Farama-Foundation/Gymnasium#1691, Farama-Foundation/Gymnasium#1703)
• DtypeObservation now keeps a Discrete observation space when changing dtype and accepts NumPy dtype descriptors (e.g. np.float32, "float32") by @​teddytennant and @​NaCr05 (Farama-Foundation/Gymnasium#1688, Farama-Foundation/Gymnasium#1706)
• ResizeObservation now preserves singleton channel dimensions (e.g. (H, W, 1) observations) by @​NaCr05 (Farama-Foundation/Gymnasium#1704)
• RescaleAction now raises an InvalidBound error when a min action equals the max action, rather than producing nan actions by @​mkzung (Farama-Foundation/Gymnasium#1665)
• NormalizeObservation and NormalizeReward (including the vector versions) now reject invalid gamma and epsilon values, which previously produced nan or diverging outputs by @​DenisDrobyshev (Farama-Foundation/Gymnasium#1669)
• RecordVideo now reports a single clear error when the environment's render mode is incompatible, instead of three by @​DenisDrobyshev (Farama-Foundation/Gymnasium#1671)

VectorEnv

• Fixed vector RecordEpisodeStatistics reporting incorrect episode statistics with SAME_STEP autoreset by @​teddytennant (Farama-Foundation/Gymnasium#1624)
• Fixed vector NormalizeReward under SAME_STEP autoreset by @​teddytennant (Farama-Foundation/Gymnasium#1668)
• Fixed vector environments modifying the sub-environment's class-level metadata when setting autoreset_mode by @​teddytennant (Farama-Foundation/Gymnasium#1623)
• Fixed AsyncVectorEnv shared memory for dtypes without an array module typecode, e.g., float16 by @​teddytennant (Farama-Foundation/Gymnasium#1632)

Env

• MuJoCo environments' default_camera_config now takes effect when no camera_id or camera_name is given, previously it was ignored as the fixed "track" camera was always used. Note that this changes the rendered output of MuJoCo environments by @​Functionhx (Farama-Foundation/Gymnasium#1618)
• Fixed mouse and scroll camera controls in human-rendered MuJoCo environments with MuJoCo 3.11+ by @​Yuming-Lee24 (Farama-Foundation/Gymnasium#1678)
• MujocoEnv no longer shrinks an offscreen framebuffer size declared in the model XML by @​midhunxavier (Farama-Foundation/Gymnasium#1642)
• Fixed the CarRacing HUD score overflowing due to float formatting by @​Fstarnb (Farama-Foundation/Gymnasium#1639)
• CliffWalking now uses the new Farama pixel art for rendering by @​MannXo (Farama-Foundation/Gymnasium#1713)

Utilities

... (truncated)

Commits

• 8ba8c3a Add external environment tradefloor (#1748)
• e055e88 Improve type hints for vector environments and wrappers (#1752)
• 63ac5c4 Use page-relative gif paths in environment grid (#1751)
• b415c42 Use new Farama pixel art for FrozenLake (#1744)
• 816e022 Use the new Farama pixel art for Blackjack (#1732)
• 115b29e Use the new Farama pixel art for Taxi (#1733)
• 1a5664b Add missing Cliff Walking assets to package data (#1731)
• 6fb69c0 Record the Cliff Walking gif from a learned policy (#1724)
• 694e912 Use the new Farama pixel art for Cliff Walking (#1713)
• 8af0918 Document Acrobot integration timestep (#1718)
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