[ENH] Improve conditional_join with cython

.github/workflows/docs.yml

@@ -28,6 +28,7 @@ jobs:
           auto-update-conda: true
           environment-file: environment-dev.yml
           miniforge-version: latest
+          channels: conda-forge, defaults
 
       - name: Install pyjanitor
         # use editable mode to avoid _pytest.pathlib.ImportPathMismatchError

.github/workflows/tests.yml

@@ -47,6 +47,7 @@ jobs:
           environment-file: environment-dev.yml
           miniforge-version: latest
 
+
       - name: Install pyjanitor
         run: python -m pip install -e .
 

.gitignore

@@ -143,3 +143,5 @@ tags
 *.profraw
 /scratch.py
 midpoint.csv
+examples/notebooks/conditional_join.ipynb
+janitor/cython_functions/cond_join.html

.pre-commit-config.yaml

@@ -8,6 +8,7 @@ repos:
       - id: end-of-file-fixer
       - id: check-yaml
       - id: check-added-large-files
+        args: ["--maxkb=2000"]
   - repo: https://github.com/psf/black
     rev: 25.1.0
     hooks:

CHANGELOG.md

@@ -4,6 +4,7 @@
 -   [ENH] Added `row_count` parameter for janitor.conditional_join - Issue #1269 @samukweku
 -   [ENH] Reverse deprecation of `pivot_wider()` -- Issue #1464
 -   [ENH] Add accessor and method for pandas DataFrameGroupBy objects. - Issue #587 @samukweku
+-   [ENH] Optimise conditional_join with cython. - Issue #1490 @samukweku
 
 ## [v0.31.0] - 2025-03-07
 

environment-dev.yml

@@ -4,10 +4,11 @@ channels:
 dependencies:
   - python=3.10
   - biopython
-  - black=22.12.0 # keep this in sync with `.pre-commit-config.yaml`
+  - black=25.1.0 # keep this in sync with `.pre-commit-config.yaml`
   - bump2version=1.0.1
   - cairo
   - conda
+  - cython
   - hypothesis
   - ipykernel
   - ipython