correction of the shap explainer and refactoring

.github/workflows/pytest_shap_explainer.yml

@@ -0,0 +1,32 @@
+
+name: Pytest - ImputeGAP - SHAP - EXPLAINER - 8
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        lfs: true
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.8'
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install libmlpack-dev
+        sudo apt-get install libopenblas-dev
+        pip install -r requirements.txt
+        pip install mypy
+        pip install pytest
+
+    - name: Run pytest
+      run: python -m pytest ./tests/test_explainer.py