create build tests workflow #1 - add flake8 in requirements dev

.github/workflows/build_tests.yml

@@ -0,0 +1,32 @@
+# https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+name: build
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["3.8", "3.9", "3.10"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r REQUIREMENTS.txt
+          pip install -r REQUIREMENTS-DEV.txt
+      - name: Lint with flake8
+        run: |
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+      - name: Test with pytest
+        run: |
+          pytest

REQUIREMENTS-DEV.txt

@@ -1,3 +1,4 @@
 pytest>=7.4.4
 pytest-cov>=4.1.0
-pygount>=1.6.1
+pygount>=1.6.1
+flake8>=7.0.0