run flake8

.github/workflows/main.yaml

@@ -7,7 +7,6 @@ on:
     branches: ["main"]
 
 jobs:
-  
   test:
     steps:
       - name: Checkout repository
@@ -15,3 +14,10 @@ jobs:
 
       - name: Run tests
         run: python3 test_main.py
+
+      - name: setup pyflake8
+        run: |
+          python -m pip install flake8
+
+      - name: run pyflake8
+        run: flake8 .

test_main.py

@@ -8,7 +8,7 @@ class TestCalculator(unittest.TestCase):
         self.assertEqual(add(-1, 1), 0)
 
     def test_subtract(self):
-        self.assertEqual(subtract(5, 2), 3)
+        self.assertEqual(subtract(5, 2), 2)
         self.assertEqual(subtract(0, 1), -1)