utils/evaluator.py

def evaluate_answers(answers):
    """Calculate final score from all answers"""
    if not answers:
        return {"score": 0, "band": "N/A"}
    
    total = sum(a["evaluation"]["score"] for a in answers)
    avg_score = total / len(answers)
    
    bands = [
        (9, "Excellent"),
        (7, "Good"),
        (5, "Average"),
        (3, "Below Average"),
        (0, "Poor")
    ]
    
    band = next((b[1] for b in bands if avg_score >= b[0]), "N/A")
    
    return {
        "score": round(avg_score, 1),
        "band": band,
        "total_questions": len(answers)
    }