Update evaluation.py

evaluation.py

@@ -1,10 +1,3 @@
-"""
-evaluation.py
-Evaluates quiz answers and returns detailed results.
-Supports Multiple Choice, True/False, Short Answer, Fill in the Blank.
-"""
-
-
 def evaluate_answers(quiz: dict, answers: dict) -> dict:
     questions = quiz["questions"]
     total = len(questions)
@@ -12,35 +5,55 @@ def evaluate_answers(quiz: dict, answers: dict) -> dict:
     details = []
 
     for i, q in enumerate(questions):
+
         user_ans = str(answers.get(i, "")).strip().lower()
         correct_ans = str(q.get("answer", "")).strip().lower()
         q_type = q.get("type", "")
 
-        if q_type in ("Short Answer", "Fill in the Blank"):
+        # Check empty answer first
+        if user_ans == "":
+            is_correct = False
+
+        # For descriptive questions
+        elif q_type in ("Short Answer", "Fill in the Blank"):
+
             # Accept if either string contains the other
-            is_correct = correct_ans in user_ans or user_ans in correct_ans
+            is_correct = (
+                correct_ans in user_ans or
+                user_ans in correct_ans
+            )
+
+        # For objective questions
         else:
             is_correct = user_ans == correct_ans
 
+        # Count correct answers
         if is_correct:
             correct_count += 1
 
+        # Store result details
         details.append({
             "correct": is_correct,
             "correct_answer": q.get("answer", "N/A"),
             "explanation": q.get("explanation", ""),
         })
 
+    # Calculate percentage
     score_pct = round((correct_count / total) * 100) if total > 0 else 0
 
+    # Feedback generation
     if score_pct == 100:
         feedback = "🌟 Perfect score! Outstanding work!"
+
     elif score_pct >= 80:
         feedback = "🎉 Excellent! You have a strong grasp of the material."
+
     elif score_pct >= 60:
         feedback = "👍 Good effort! Review the questions you missed to reinforce your understanding."
+
     elif score_pct >= 40:
         feedback = "📖 Keep practising. Revisit the study material for the topics you found tricky."
+
     else:
         feedback = "💪 Don't give up! Go back to the study notes and try again — you'll improve."