added flake8 workflow

removed travis CI files

.gitattributes

@@ -2,6 +2,5 @@
 .settings/ export-ignore
 .gitattributes export-ignore
 .gitignore export-ignore
-.travis.yml export-ignore
 README.md export-ignore
 CHANGELOG.md export-ignore

.github/workflows/flake8.yml

@@ -0,0 +1,19 @@
+name: Python Code Check
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  flake8-lint:
+    runs-on: ubuntu-latest
+    name: flake8 Linter
+    steps:
+      - name: Check out source repository
+        uses: actions/checkout@v3
+      - name: Set up Python environment
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.8"
+      - name: flake8 Lint
+        uses: py-actions/flake8@v2
+        with:
+          max-line-length: "150"