pyjanitor-devs/pyjanitor

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Clean APIs for data cleaning. Python implementation of R package Janitor

Stars: 1.5k
Forks: 198
Open beginner issues: 0
Indexed issues: 128
Avg merge: 2d 8h
Merged PRs (30d): 12

Dominant language: Python
License: MIT
Last GitHub push: Sep 7, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted hacktoberfest

Beginner friendly Everything

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128 open issues indexed

Port dual non-equi region join core to one Rust call Open

pyjanitor-devs/pyjanitor#1726 · 1 assignee · Opened Sep 18, 2026
Normalize count/size aggregation requests for janitor-rs Open

pyjanitor-devs/pyjanitor#1725 · 1 assignee · Opened Sep 18, 2026
Clarify join_agg index normalization in aggregation helper documentation Open

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

pyjanitor-devs/pyjanitor#1724 · Opened Sep 17, 2026
Clarify join_agg index normalization in aggregation helper documentation Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

pyjanitor-devs/pyjanitor#1723 · Opened Sep 17, 2026
[FEATURE] Consider deprecating or inferring varname in check() utility Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1720 · Opened Sep 13, 2026
conditional_join: force=True bypasses dtype check for == conditions routed through the non-equi path Open

pyjanitor-devs/pyjanitor#1719 · 1 assignee · Opened Sep 12, 2026
Validate and reject empty inputs in join_agg Open

pyjanitor-devs/pyjanitor#1715 · 1 assignee · Opened Sep 8, 2026
ENH/PERF: support unordered any-match selection for conditional_join Open

pyjanitor-devs/pyjanitor#1711 · 2 comments · 1 assignee · Opened Sep 3, 2026
PERF: avoid full pair materialization for multi-condition all-!= anti-joins Open

pyjanitor-devs/pyjanitor#1710 · 1 assignee · Opened Sep 3, 2026
[PERF] Fuse join discovery and aggregation for join_agg Open

pyjanitor-devs/pyjanitor#1699 · 1 assignee · Opened Aug 28, 2026
CI: test pyjanitor against the candidate janitor-rs wheel Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

pyjanitor-devs/pyjanitor#1697 · Opened Aug 27, 2026
Add real end-to-end parity tests for janitor-rs fast-path dispatch (#1691, #1693) Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

pyjanitor-devs/pyjanitor#1694 · Opened Aug 26, 2026
docs: explain conditional_join and reverse-aggregation index representations Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

pyjanitor-devs/pyjanitor#1688 · 1 comment · Opened Aug 26, 2026
[PERF] Reduce or eliminate intermediate matches arrays in conditional_join Open

pyjanitor-devs/pyjanitor#1687 · 7 comments · 1 assignee · Opened Aug 26, 2026
[PERF] Coordinate compact reverse start/end aggregations with janitor-rs Open

enhancement

pyjanitor-devs/pyjanitor#1682 · 1 assignee · Opened Aug 25, 2026
[BUG] adorn_pct_formatting, adorn_ns and adorn_rounding overwrite a numeric first column Open

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

pyjanitor-devs/pyjanitor#1676 · Opened Aug 22, 2026
[PERF] Add guarded fast paths for cartesian_product and expand Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

pyjanitor-devs/pyjanitor#1670 · Opened Aug 21, 2026
[PERF] Speed up complete for unsorted domains and many groups Open

enhancement python

Difficulty 5/5 Over a week Newbie friendliness 42/100

pyjanitor-devs/pyjanitor#1669 · Opened Aug 21, 2026
[PERF] Extend selective bound selection to keep='all' for range joins Open

pyjanitor-devs/pyjanitor#1666 · 1 assignee · Opened Aug 21, 2026
[PERF] Selective predicate selection doesn't reach equi+non-equi combined joins Open

pyjanitor-devs/pyjanitor#1664 · 1 comment · 1 assignee · Opened Aug 21, 2026
[PERF] Predicate-order sensitivity in join_algorithm='regions' (_not_range_join_regions.py) Open

pyjanitor-devs/pyjanitor#1660 · 1 assignee · Opened Aug 20, 2026
[PERF] Selectivity-aware anchor selection for range joins (le_lt/ge_gt) Open

pyjanitor-devs/pyjanitor#1659 · 2 comments · 1 assignee · Opened Aug 20, 2026
[PERF] Extend selectivity-aware anchor predicate selection to keep='all' Open

pyjanitor-devs/pyjanitor#1657 · 1 assignee · Opened Aug 20, 2026
[PERF] Profile remaining pivot_longer stack fast paths Open

discussion-needed enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1656 · 2 comments · Opened Aug 19, 2026
[PERF] Optimize conditional_join range min/max aggregations Open

pyjanitor-devs/pyjanitor#1653 · 1 assignee · Opened Aug 19, 2026
[PERF] Optimize unsorted dual-range keep first/last selection Open

pyjanitor-devs/pyjanitor#1652 · 4 comments · 1 assignee · Opened Aug 19, 2026
[PERF] Simplify the conditional_join Python/Rust boundary Open

pyjanitor-devs/pyjanitor#1649 · 1 comment · 1 assignee · Opened Aug 19, 2026
Consider consolidating duplicated pivot_longer stack helpers Open

discussion-needed enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1637 · Opened Aug 19, 2026
[PERF] Benchmark and simplify conditional_join result materialization Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

pyjanitor-devs/pyjanitor#1632 · 2 comments · Opened Aug 19, 2026
Add anti-join for conditional_join Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

pyjanitor-devs/pyjanitor#1627 · Opened Aug 15, 2026
Consider auto-release only on code changes Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

pyjanitor-devs/pyjanitor#1549 · Opened Dec 23, 2025
Test / update for the upcoming pandas 3.0 release Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

pyjanitor-devs/pyjanitor#1546 · 4 comments · 4 reactions · Opened Dec 22, 2025
major overhaul of pyjanitor Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

pyjanitor-devs/pyjanitor#1539 · 4 comments · 1 reaction · Opened Dec 11, 2025
Module not found error Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

pyjanitor-devs/pyjanitor#1528 · 8 comments · Opened Nov 10, 2025
_metadata properties do not work with pyjanitor Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

pyjanitor-devs/pyjanitor#1473 · 8 comments · Opened May 14, 2025
Suggest replacing scipy.stats.norm.cdf with scipy.special.ndtr for performance improvement Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

pyjanitor-devs/pyjanitor#1468 · 1 comment · Opened Apr 21, 2025
Equivalent to unite in dplyr Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

pyjanitor-devs/pyjanitor#1445 · 2 comments · Opened Feb 18, 2025
deprecation warning in basic example Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1442 · 1 comment · Opened Jan 30, 2025
Extend engine interface to duckdb? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

pyjanitor-devs/pyjanitor#1433 · 1 reaction · Opened Jan 6, 2025
add `strip_whitespace` to `clean_names` function Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

pyjanitor-devs/pyjanitor#1385 · Opened Jul 7, 2024
Question about "tabyl()" in pyjanitor Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1366 · 3 comments · Opened May 23, 2024
implement similar functions for polars Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

pyjanitor-devs/pyjanitor#1352 · 9 comments · 2 reactions · Opened Apr 21, 2024
[DOC] Add Version Changed mark for new methods and arguments Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1188 · 2 comments · 2 reactions · Opened Nov 2, 2022
Read files from archive - zip, tar, etc Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

pyjanitor-devs/pyjanitor#1171 · 2 comments · Opened Oct 3, 2022
Set a series of complete testing envs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1127 · 5 comments · 2 reactions · Opened Jun 21, 2022
[EHN] let `column_name` or `column_names` support callback type Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

pyjanitor-devs/pyjanitor#1115 · 1 comment · 1 reaction · Opened Jun 13, 2022
Deprecate functions ? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

pyjanitor-devs/pyjanitor#1045 · 7 comments · Opened Mar 17, 2022
[ENH] let `fill_empty` function support to fill NaN value with mean, median or mode Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

pyjanitor-devs/pyjanitor#1044 · 4 comments · 1 reaction · Opened Mar 16, 2022
Auto-wrapper for vaex? Open

discussion-needed enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

pyjanitor-devs/pyjanitor#1026 · 3 comments · 1 reaction · Opened Feb 23, 2022
[BUG] Support `Hashable` type column Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

pyjanitor-devs/pyjanitor#1016 · 1 reaction · Opened Feb 11, 2022

pyjanitor-devs/pyjanitor

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