SF patch 1547796 by Georg Brandl -- set literals.
diff --git a/Tools/compiler/astgen.py b/Tools/compiler/astgen.py
index 59b98f2..26a185b 100644
--- a/Tools/compiler/astgen.py
+++ b/Tools/compiler/astgen.py
@@ -235,7 +235,7 @@
 
 This file is automatically generated by Tools/compiler/astgen.py
 """
-from consts import CO_VARARGS, CO_VARKEYWORDS
+from compiler.consts import CO_VARARGS, CO_VARKEYWORDS
 
 def flatten(seq):
     l = []