open-edge-platform/anomalib

✨ Migrate from Pandas to Polars

Closed

#3,370 opened on Feb 24, 2026

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 (9 comments) (0 reactions) (1 assignee)Python (931 forks)auto 404
Good First Issuestale

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Description

Problem Description

Polars claims to be faster than Pandas. To be in line with the ongoing efforts in adopting modern tools, the idea is to replace all pandas references with polars

Proposed Solution

Replace all existing Pandas code with Polars

Alternatives Considered

No response

Additional Context

Here is a link to their website for those new to the library. https://pola.rs/

Imo, the mapping between pandas and polars should be 1:1. Since his upgrade will mean touching large parts of anomalib's codebase, it is a great activity for anyone intending on becoming familiar with the codebase.

Contributor guide

Research direction
Study the Polars documentation for equivalents of each Pandas operation used in the codebase. Start by identifying all Pandas imports and function calls, then replace them with Polars counterparts. Ensure API compatibility and test coverage.
Tech stack
pythonpandas
Domain
datamachine learningbackend
Issue type
Refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
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.
Mostly clear
Prerequisites
PythonPandasPolars
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70