new flake8 throws errors for global variables

Author: stefdoerr

Diff for: .github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Lint with flake8
         run: |
-          pip install flake8 coverage
+          pip install flake8==7.1.2 coverage
           # 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