Update app.py

app.py

@@ -23,17 +23,22 @@ def grade(student_code):
                             pin_num = str(args[0].value)
                             if pin_num in pin_setup:
                                 pin_setup[pin_num] = True
-                elif isinstance(node.value, ast.NameConstant) and isinstance(node.targets[0], ast.Name):
+                elif isinstance(node.value, (ast.NameConstant, ast.Constant)) and isinstance(node.targets[0], ast.Name):
                     bool_variable_used = True
 
             if isinstance(node, ast.If):
-                if isinstance(node.test, ast.Call) and isinstance(node.test.func, ast.Attribute):
+                if isinstance(node.test, ast.UnaryOp) and isinstance(node.test.op, ast.Not):
+                    if isinstance(node.test.operand, ast.Call) and isinstance(node.test.operand.func, ast.Attribute):
+                        if node.test.operand.func.attr == "value":
+                            button_used = True
+                elif isinstance(node.test, ast.Call) and isinstance(node.test.func, ast.Attribute):
                     if node.test.func.attr == "value":
                         button_used = True
-                        for stmt in node.body:
-                            if isinstance(stmt, ast.Assign):
-                                if isinstance(stmt.value, ast.UnaryOp) and isinstance(stmt.value.op, ast.Not):
-                                    led_toggle_detected = True
+                
+                for stmt in node.body:
+                    if isinstance(stmt, ast.Assign):
+                        if isinstance(stmt.value, ast.UnaryOp) and isinstance(stmt.value.op, ast.Not):
+                            led_toggle_detected = True
 
         if not all(pin_setup.values()):
             feedback.append("⛔️ Pins 22 (LED) and 15 (button) must be correctly set up (-3 pts).")