Curated issues

scikit-learn Good First Issues for Python

Python issues that involve scikit-learn: the project is tagged with it, or the issue itself is about it.

scikit-learn

Open issues
10.2k
New this week
123
Nobody on it yet
7.7k
Average difficulty
3.7/5

What this list is like

  • Average annotated difficulty: 3.7/5 across 10,466 issues.
  • 15% of 10,466 time estimates are one day or less.

Updated Nov 11, 2026.

About scikit-learn

scikit-learn is a Python library for classical machine learning, first released in 2007. It offers classification, regression, clustering and preprocessing behind one consistent estimator API.

Beginner friendly Everything
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Issues somebody may already be working on are listed last. List everything by date

  • medianstop SetTrialStatus doesn't wait for the status patch, so a failed EarlyStopped update is reported as success
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 80/100

    kubeflow/katib#2756 ·

    Maintainers usually reply within 1 day

  • [BUG] prices_to_returns(fill_nan=False) drops mid-series rows and returns multi-period returns
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 74/100

    skfolio/skfolio#499 ·

    Maintainers usually reply within 1 day

  • CONTRIBUTORS.md is behind the merged pull requests (weekly check)
    Open
    • Is something wrong?
    community

    Difficulty 2/5 1-3 hours Newbie friendliness 88/100

    yakew7/Fair-Code#1315 ·

    Maintainers usually reply within 1 day

  • Traction figures out of date (weekly check)
    Open
    • Is something wrong?
    community

    Difficulty 1/5 1-3 hours Newbie friendliness 90/100

    yakew7/Fair-Code#1314 ·

    Maintainers usually reply within 1 day

  • Docs: add brand/logo usage guidelines
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 70/100

    flwrlabs/flower#8501 ·

    Maintainers usually reply within 1 day

  • check_contributors.py --stub starts every entry with only PR titles
    Open
    • Is something wrong?
    community enhancement

    Difficulty 2/5 1-3 hours Newbie friendliness 79/100

    yakew7/Fair-Code#1307 ·

    Maintainers usually reply within 1 day

  • check_generated_files_current.py's git calls have no timeout
    Open
    • Is something wrong?
    ci enhancement tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 85/100

    yakew7/Fair-Code#1305 ·

    Maintainers usually reply within 1 day

  • The benchmark-harness job installs pytest alone, not the test extra
    Open
    • Is something wrong?
    ci enhancement tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 80/100

    yakew7/Fair-Code#1301 ·

    Maintainers usually reply within 1 day

  • The profiler job's make coverage repeats the slow tests the benchmark-harness job runs
    Open
    • Is something wrong?
    ci enhancement testing

    Difficulty 2/5 1-3 hours Newbie friendliness 75/100

    yakew7/Fair-Code#1300 ·

    Maintainers usually reply within 1 day

  • check_contributors.py --stub takes one login per run
    Open
    • Is something wrong?
    community enhancement tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 79/100

    yakew7/Fair-Code#1299 ·

    Maintainers usually reply within 1 day

  • [FAQ] How do I use `GridSearchCV` with parallel processing, and how do I fix the scikit-learn parallel-processing warning?
    May be free again Open
    • Is something wrong?
    faq-proposal

    Difficulty 1/5 1-3 hours Newbie friendliness 86/100

    DataTalksClub/faq#551 · 4 comments ·

    Maintainers usually reply within 2 days

  • Five scripts repeat the same try/except import of ghcall
    Open
    • Is something wrong?
    enhancement good first issue tooling

    Difficulty 2/5 1-3 hours Newbie friendliness 78/100

    yakew7/Fair-Code#1283 · 1 comment ·

    Maintainers usually reply within 1 day

  • ci: the macOS test job is cancelled at about 15 minutes with no logs, on main and on PRs
    Open
    • Is something wrong?
    bug roadmap

    Difficulty 2/5 1-3 hours Newbie friendliness 77/100

    PhilanthroPy-Project/PhilanthroPy#366 ·

    Maintainers usually reply within 1 day

  • Cookie banner should not grey out the page
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 67/100

    probabl-ai/skore#3358 · 2 comments ·

    Maintainers usually reply within 1 day

  • feat(viz): plot one donor's score explanation from `explain_donor_scores`
    Open
    • Is something wrong?
    enhancement help wanted roadmap

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

    PhilanthroPy-Project/PhilanthroPy#345 ·

    Maintainers usually reply within 1 day

  • Add a pre-commit hook definition
    Open
    • Is something wrong?
    enhancement good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 76/100

    Satvik-jain/trainlint#7 ·

  • Add Python 3.14 to the CI matrix
    Open
    • Is something wrong?
    batch-2 difficulty: easy enhancement good first issue help wanted quality

    Difficulty 1/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#543 ·

    Maintainers usually reply within 2 days

  • Add a Russian README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 Half a day Newbie friendliness 68/100

    eyadstein/leaklens#522 ·

    Maintainers usually reply within 2 days

  • Add an Indonesian README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 65/100

    eyadstein/leaklens#521 ·

    Maintainers usually reply within 2 days

  • Add a Hindi README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 Half a day Newbie friendliness 62/100

    eyadstein/leaklens#520 ·

    Maintainers usually reply within 2 days

  • Add a Simplified Chinese README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#518 ·

    Maintainers usually reply within 2 days

  • Add a German README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 70/100

    eyadstein/leaklens#517 ·

    Maintainers usually reply within 2 days

  • Add a Spanish README translation
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#516 ·

    Maintainers usually reply within 2 days

  • Add a one-page cheat sheet of the top 10 leaks
    Open
    • Is something wrong?
    batch-2 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#514 ·

    Maintainers usually reply within 2 days

  • Add a Portuguese README translation
    Open
    • Is something wrong?
    batch-1 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 1/5 1-3 hours Newbie friendliness 65/100

    eyadstein/leaklens#307 ·

    Maintainers usually reply within 2 days

  • Add CODE_OF_CONDUCT.md
    Open
    • Is something wrong?
    batch-1 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 1/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#299 ·

    Maintainers usually reply within 2 days

  • Add issue and PR templates (bug, feature, rule request)
    Open
    • Is something wrong?
    batch-1 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#298 ·

    Maintainers usually reply within 2 days

  • Add CHANGELOG.md in keep-a-changelog format
    Open
    • Is something wrong?
    batch-1 difficulty: easy documentation enhancement good first issue help wanted

    Difficulty 1/5 1-3 hours Newbie friendliness 65/100

    eyadstein/leaklens#296 ·

    Maintainers usually reply within 2 days

  • Warn (info level) when train_test_split has no random_state
    Open
    • Is something wrong?
    batch-1 difficulty: easy enhancement good first issue help wanted scanner

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    eyadstein/leaklens#144 ·

    Maintainers usually reply within 2 days

  • CI check: translated READMEs keep the same command blocks as the English README
    Open
    • Is something wrong?
    devops difficulty: medium help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 75/100

    eyadstein/leaklens#124 ·

    Maintainers usually reply within 2 days

  • leaklens images: do not follow symlinks and add a maximum image count
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

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

    eyadstein/leaklens#123 ·

    Maintainers usually reply within 2 days

  • FAQ: Homework 5 (05-deployment) — deploying ML models (2026)
    Open
    • Is something wrong?

    Difficulty 1/5 Under an hour Newbie friendliness 83/100

    DataTalksClub/machine-learning-zoomcamp#743 ·

  • Add an .editorconfig
    Open
    • Is something wrong?
    difficulty: easy enhancement good first issue

    Difficulty 1/5 Under an hour Newbie friendliness 88/100

    eyadstein/leaklens#106 ·

    Maintainers usually reply within 2 days

  • Ship a py.typed marker and the Typing :: Typed classifier
    Open
    • Is something wrong?
    difficulty: easy enhancement good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 83/100

    eyadstein/leaklens#105 ·

    Maintainers usually reply within 2 days

  • Document and test the exit code contract (0 clean, 1 findings, 2 usage error)
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 78/100

    eyadstein/leaklens#103 ·

    Maintainers usually reply within 2 days

  • Benchmark: per-detector precision and recall table in docs/BENCHMARK.md
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 70/100

    eyadstein/leaklens#102 ·

    Maintainers usually reply within 2 days

  • Pre-commit mode: scan staged files only with a fast path
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

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

    eyadstein/leaklens#101 ·

    Maintainers usually reply within 2 days

  • --md output for GitHub step summaries and PR comments
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    eyadstein/leaklens#98 ·

    Maintainers usually reply within 2 days

  • Streamlit: preview the notebook with flagged lines highlighted
    Open
    • Is something wrong?
    difficulty: medium enhancement help wanted

    Difficulty 2/5 1-3 hours Newbie friendliness 83/100

    eyadstein/leaklens#94 ·

    Maintainers usually reply within 2 days

  • The DeLong variance in the AUC gaps explainer is quadratic and takes 17 seconds
    Open
    • Is something wrong?
    enhancement

    Difficulty 2/5 1-3 hours Newbie friendliness 76/100

    yakew7/Fair-Code#1169 · 2 comments ·

    Maintainers usually reply within 1 day

  • Add Gitleaks and TruffleHog adapters to the benchmark
    Open
    • Is something wrong?
    good first issue

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

    eyadstein/secretsift#1 ·

  • Dedupe and sort findings by severity, file and line
    Open
    • Is something wrong?
    enhancement help wanted

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

    eyadstein/leaklens#49 ·

    Maintainers usually reply within 2 days

  • Benchmark: add real-world style negatives (clean notebooks)
    Open
    • Is something wrong?
    documentation good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 78/100

    eyadstein/leaklens#43 ·

    Maintainers usually reply within 2 days

  • Streamlit UI: show fix suggestions and download the HTML report
    Open
    • Is something wrong?
    enhancement good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 78/100

    eyadstein/leaklens#42 ·

    Maintainers usually reply within 2 days

  • Add a fail-under input to the GitHub Action
    Open
    • Is something wrong?
    enhancement good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 82/100

    eyadstein/leaklens#36 ·

    Maintainers usually reply within 2 days

  • Add ruff lint and format checks to CI
    Open
    • Is something wrong?
    devops good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    eyadstein/leaklens#34 ·

    Maintainers usually reply within 2 days

  • Bug: `SurvivalFunctionEstimator.predict_proba` raises `IndexError` for confidence intervals past the last time
    Open
    • Is something wrong?

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

    sebp/scikit-survival#653 ·

    Maintainers usually reply within 1 day

  • ML dependencies & Phase 2 README
    Open
    • Is something wrong?
    phase-2

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    NonnaD/bioreactor-foam-detection#7 ·

  • Inline suppression comments (leaklens: ignore)
    May be free again Open
    • Is something wrong?
    enhancement good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 84/100

    eyadstein/leaklens#9 ·

    Maintainers usually reply within 2 days

  • Add "Open in Colab" badges to unsupervised, RL and advanced notebooks
    Open
    • Is something wrong?
    documentation good first issue

    Difficulty 2/5 1-3 hours Newbie friendliness 82/100

    imam-db/ml-algo#21 ·

    Maintainers usually reply within 1 day

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