Fixes #956 Add features_group parameter to ExhaustiveFeatureSelector [WIP]

.github/workflows/linter.yml

@@ -20,4 +20,4 @@ jobs:
           isort -p mlxtend --check --diff --line-length 88 --multi-line 3 --py 39 --profile black mlxtend/*
           black --check --diff mlxtend/*
           # exit-zero treats all errors as warnings.
-          flake8 . --count --exit-zero --statistics
+          flake8 . --config=.flake8 --count --exit-zero --statistics 

.pre-commit-config.yaml

@@ -4,16 +4,17 @@ repos:
     hooks:
       - id: isort
         name: Format imports
-        args: ["--project", "mlxtend", "--profile", "black"]
+        args: ["--project", "mlxtend", "--line-length", " 88", "--multi-line", "3", "--py", "39", "--profile", "black", "mlxtend/*black"]
 
   - repo: https://github.com/psf/black
-    rev: 22.3.0
+    rev: 22.6.0
     hooks:
       - id: black
         name: Format code
 
   - repo: https://github.com/PyCQA/flake8
-    rev: 4.0.1
+    rev: 5.0.4
     hooks:
       - id: flake8
-        name: Check PEP8
+        name: Check PEP8
+        args: ["--config", ".flake8"]

docs/sources/CHANGELOG.md

@@ -7,7 +7,7 @@ The CHANGELOG for the current development version is available at
 
 ---
 
-### Version 0.20.0
+### Version 0.21.0 (TBD)
 
 #### New Features and Enhancements
 
@@ -22,10 +22,11 @@ The CHANGELOG for the current development version is available at
 ##### New Features and Enhancements
 
 - The `mlxtend.evaluate.feature_importance_permutation` function has a new `feature_groups` argument to treat user-specified feature groups as single features, which is useful for one-hot encoded features. ([#955](https://github.com/rasbt/mlxtend/pull/955))
+- The `mlxtend.feature_selection.ExhaustiveFeatureSelector` also gained support for `feature_groups` with a behavior similar to the one described above.  ([#957](https://github.com/rasbt/mlxtend/pull/957) via [Nima Sarajpoor](https://github.com/NimaSarajpoor))
 
 ##### Changes
 
-- None
+- The `custom_feature_names` parameter was removed from the `ExhaustiveFeatureSelector` due to redundancy and to simplify the code base. The [`ExhaustiveFeatureSelector` documentation](http://rasbt.github.io/mlxtend/user_guide/feature_selection/ExhaustiveFeatureSelector/) illustrates how the same behavior and outcome can be achieved using pandas DataFrames.  ([#957](https://github.com/rasbt/mlxtend/pull/957))
 
 ##### Bug Fixes
 
@@ -910,4 +911,4 @@ imput arrays via `transform` and `fit_transform`
 
 ### Version 0.1.1 (2014-08-13)
 
-- Simplified code for ColumnSelector.
+- Simplified code for ColumnSelector.