Update ustr.py

Author: yangjiangjie

libs/ustr.py

@@ -9,7 +9,9 @@ def ustr(x):
         if type(x) == str:
             return x.decode(DEFAULT_ENCODING)
         if type(x) == QString:
-            return unicode(x)
+            #https://blog.csdn.net/friendan/article/details/51088476
+            #https://blog.csdn.net/xxm524/article/details/74937308
+            return unicode(x.toUtf8(), DEFAULT_ENCODING, 'ignore')
         return x
     else:
         return x