sort in python

db.py

@@ -165,7 +165,8 @@ class db():
 
     def get_keywords_weight_list(self):
         kw = self.c_kw
-        return list(kw.find({}, {'_id': False}).sort('keyword', ASCENDING))
+        ret = sorted(kw.find({}, {'_id': False}), key=lambda k: k['keyword'].lower())
+        return list(ret)
 
     def get_keywords(self, category):
         kw = self.c_kw