Fix: Integrate flake8 linting into tox for CI

- Added a new [testenv:lint] environment to tox.ini to manage flake8 execution.
- Modified the GitHub Actions workflow (.github/workflows/testing.yml) to:
  - Run `tox -e lint` for the linting stage.
  - Condition the linting step to run only on Python 3.10 to save CI resources.
- This resolves the "flake8: command not found" error in the CI by ensuring flake8 is installed and run within a tox-managed environment.

Co-authored-by: xethorn <1835927+xethorn@users.noreply.github.com>

Author: google-labs-jules[bot]

.github/workflows/testing.yml

@@ -23,10 +23,9 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install tox
-    - name: Lint with flake8
-      run: |
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Lint with tox
+      if: matrix.python-version == '3.10'
+      run: tox -e lint
     - name: Test with tox
       env:
         COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}

docs/index.rst

@@ -38,13 +38,13 @@ see the `example`_ directory in the repository.
             self.create_order_activity,
             input={'item': item})
         total += activity.result.get('price')
-        
+
     pay_activity = schedule(
         'pay', self.create_payment_activity,
         input={'total': total})
 
     get_order = schedule('get_order', self.create_get_order_activity)
-    
+
     # Waiting for paying and getting the order to complete before
     # we let the user leave the coffee shop.
     pay_activity.wait(), get_order.wait()

tox.ini

@@ -7,3 +7,9 @@ commands = py.test
 
 [testenv:py3]
 deps = -rrequirements.txt
+
+[testenv:lint]
+deps = flake8
+commands =
+    flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+    flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics