Comment out the warnings about mktemp().  These are too annoying, and
often unavoidable.
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index 97f1252..0393ba5 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -324,9 +324,9 @@
     the punch.
     """
 
-    from warnings import warn as _warn
-    _warn("mktemp is a potential security risk to your program",
-          RuntimeWarning, stacklevel=2)
+##    from warnings import warn as _warn
+##    _warn("mktemp is a potential security risk to your program",
+##          RuntimeWarning, stacklevel=2)
 
     if dir is None:
         dir = gettempdir()