Update python-package-conda.yml

.github/workflows/python-package-conda.yml

@@ -9,7 +9,11 @@ on:
 
 jobs:
   run-notebooks:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
     - name: Checkout repository
@@ -23,13 +27,21 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install jupyter nbconvert
-        pip install -r requirements.txt
+        pip install jupyter nbconvert flake8
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      shell: bash
 
     - name: Convert Jupyter notebooks to Python scripts
       run: |
         find . -name "*.ipynb" -exec jupyter nbconvert --to script {} \;
+      shell: bash
+
+    - name: Run Flake8 linting
+      run: |
+        find . -name "*.py" -exec flake8 {} \;
+      shell: bash
 
     - name: Run Python scripts
       run: |
         find . -name "*.py" -exec python {} \;
+      shell: bash