Builtins moved in Py 3.x

1 files changed, 9 insertions, 1 deletions

diff --git a/coverage/execfile.py b/coverage/execfile.py
index 43bdc5c3..09947bcd 100644
--- a/coverage/execfile.py
+++ b/coverage/execfile.py
@@ -2,6 +2,14 @@
 
 import imp, os, sys
 
+try:
+    # In Py 2.x, the builtins were in __builtin__
+    BUILTINS = sys.modules['__builtin__']
+except KeyError:
+    # In Py 3.x, they're in builtin
+    BUILTINS = sys.modules['builtin']
+
+
 def run_python_file(filename, args):
     """Run a python file as if it were the main program on the command line.
     
@@ -15,7 +23,7 @@ def run_python_file(filename, args):
     main_mod = imp.new_module('__main__')
     sys.modules['__main__'] = main_mod
     main_mod.__file__ = filename
-    main_mod.__builtins__ = sys.modules['__builtin__']
+    main_mod.__builtins__ = BUILTINS
 
     # Set sys.argv and the first path element properly.
     old_argv = sys.argv