created flake8 python linting workflow

.github/workflows/PythonLint.yml

@@ -0,0 +1,21 @@
+name: Python Linting
+
+on: [push]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          python -m pip install -U pip
+          pip install -r requirements.txt
+      - name: Flake8 Lint
+        run: |
+          pip install flake8
+          flake8 --max-line-length=120 --show-source