.

build.py

@@ -3,7 +3,7 @@ from __future__ import print_function
 import json, sys
 import os.path
 
-def readin(path, func=lambda x: x, orelse=None):
+def readin(path, func=bytes, orelse=None):
     if os.path.exists(path):
         with open(path, 'rb') as fin:
             return func(fin.read())