Updating Syntax Error

app.py

@@ -225,7 +225,7 @@ def reading_difficulty(excerpt):
         win_preds = []
         for text in windows:
             win_preds.append(predict(text, tokenizer).item())
-        result = statistics.mean(win_preds)
+        result = np.mean(win_preds)
         score = -(result * 1.786 + 6.4) + 10
         return "Difficulty Level: " + str(round(score, 2)) + '/10' + ' | A ' + str(
             level(score)) + " student could understand this"