Fix deprecation warning in tempfile.
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index 2dfc609..f2ddbb0 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -205,7 +205,7 @@
                     _os.unlink(filename)
                 return dir
             except (OSError, IOError) as e:
-                if e[0] != _errno.EEXIST:
+                if e.args[0] != _errno.EEXIST:
                     break # no point trying more names in this directory
                 pass
     raise IOError, (_errno.ENOENT,