Github workflow

.github/workflows/tox.yaml

@@ -0,0 +1,27 @@
+name: Python package
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox tox-gh-actions
+    - name: Lint with tox
+      run: tox -e pep8
+    - name: Test with tox
+      run: tox -e py${{ matrix.python-version }}

src/charm.py

@@ -15,7 +15,6 @@ develop a new k8s charm using the Operator Framework:
 import logging
 from typing import List
 
-import ops.framework
 from ops.framework import StoredState
 from ops.main import main
 
@@ -45,10 +44,6 @@ class OVNRelayOperatorCharm(ovn_charm.OSBaseOVNOperatorCharm):
 
     _state = StoredState()
 
-    def __init__(self, framework: ops.framework.Framework) -> None:
-        """Run constructor."""
-        super().__init__(framework)
-
     def get_pebble_handlers(self):
         pebble_handlers = [
             OVNRelayPebbleHandler(

tox.ini

@@ -35,26 +35,16 @@ whitelist_externals =
 passenv = HOME TERM CS_* OS_* TEST_*
 deps = -r{toxinidir}/test-requirements.txt
 
-[testenv:py35]
-basepython = python3.5
-# python3.5 is irrelevant on a focal+ charm.
-commands = /bin/true
-
-[testenv:py36]
-basepython = python3.6
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-
-[testenv:py37]
-basepython = python3.7
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-
-[testenv:py38]
+[testenv:py3.8]
 basepython = python3.8
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
+[testenv:py3.9]
+basepython = python3.9
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+
 [testenv:py3]
 basepython = python3
 deps = -r{toxinidir}/requirements.txt