ENH: new function `replace`

Open Beginner friendly

#992 opened on Sep 17, 2026 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 72/100

Issue type: Feature
Clarity: Mostly clear
Activity status: Active
Tech stack: python
Domain: data

Research direction

Start with the contributor guide at data-apis.org/array-api-extra/contributing.html, then inspect existing array functions using xp.where and xp.equals. Add the proposed xp.replace(array, old, new) behavior and verify that the function is exposed and tested consistently with the project’s existing conventions.

Written by the indexing model from the issue text.

Description

enhancement new function

From https://hackmd.io/zn5bvdZTQIeJmb3RW1B-8g?both#Updates-from-the-sparse-array-ecosystem-Willow, @willow-ahrens suggested an xp.replace(array, old, new) function, which could have the agnostic implementation xp.where(xp.equals(...), old, new ).

@willow-ahrens if you'd like to work on this, we have contributor docs at https://data-apis.org/array-api-extra/contributing.html.

Dominant language: Python
Stars: 33
Forks: 32
Avg merge: 5h 58m
Merged PRs (30d): 47

Contributor guide

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First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

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