Feat: add total score_rate

recopytex/scripts/exam.py

@@ -157,3 +157,11 @@ class Exam:
 
         self.tribe_path.mkdir(exist_ok=True)
         base_df.to_csv(self.path(".csv"), index=False)
+
+    @property
+    def score_rate(self):
+        total = 0
+        for ex, questions in self._exercises.items():
+            total += sum([q["score_rate"] for q in questions])
+
+        return total