fix autograder issues

.github/workflows/classroom.yml

@@ -18,8 +18,8 @@ jobs:
       uses: classroom-resources/autograding-command-grader@v1
       with:
         test-name: test code formatting
-        setup-command: ''
-        command: python -m pytest
+        setup-command: 'pip install -r requirements.txt'
+        command: python -m pytest -m "not skipautograding"
         timeout: 10
     - name: Autograding Reporter
       uses: classroom-resources/autograding-grading-reporter@v1

pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+markers =
+    skipautograding: disable tests for autograding since environment is not consistent

requirements.txt

@@ -1,3 +1,4 @@
 pytest
 black
-flake8
+flake8
+flake8-nb

tests/test_linter_formatter.py

@@ -1,6 +1,7 @@
 import os
 import re
 import subprocess
+import pytest
 from pathlib import Path
 
 
@@ -23,6 +24,7 @@ def test_flake8():
         print("No stylistic errors found!")
     assert failure == 0
 
+@pytest.mark.skipautograding
 def test_flake8_nb():
     # Get the repository directory
     current_dir = Path(__file__).resolve().parents[1]