in difficulty.py: we have changed line 63, i increased the value of the default level from 3 to 8

app/difficulty.py

@@ -60,7 +60,7 @@ def get_difficulty_level_for_user(d1, d2):
             if stem in d2:  # 如果用户的词的词根存在于词库d2的词根库中
                 d2[k] = d2[stem]  # 按照词根进行评级
             else:
-                d2[k] = 3  # 如果k的词根都不在，那么就当认为是3级
+                d2[k] = 8  # 如果k的词根都不在，那么就当认为是8级  3 was too low and makes the user level drop
     return d2