Farama-Foundation/Gymnasium

[Proposal] Allow to specify dtype for Discrete

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#1,118 opened on Jul 13, 2024

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 (3 comments) (0 reactions) (0 assignees)Python (567 forks)batch import
enhancementgood first issue

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Description

Proposal

Add dtype argument to spaces.Discrete (similar to MultiDiscrete and Box).

Motivation

Currently the dtype is fixed to numpy.int64. However, often Discrete spaces are much smaller, resulting in a waste of memory.

Pitch

No response

Alternatives

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Additional context

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Checklist

  • I have checked that there is no similar issue in the repo

Contributor guide

Research direction
The Discrete space implementation is located in gymnasium/spaces/discrete.py. Similar dtype parameters exist in MultiDiscrete and Box spaces, which can serve as reference. The issue has 3 comments suggesting potential implementation details. No linked PRs. The task involves adding a dtype parameter to the init method and ensuring it is used in sampling and other methods.
Tech stack
pythonnumpy
Domain
api
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Basic numpy knowledgeUnderstanding of Gymnasium Discrete space
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75