diff -r fe6c7771c25c Lib/uuid.py
--- a/Lib/uuid.py	Wed Sep 14 14:56:32 2011 -0700
+++ b/Lib/uuid.py	Thu Sep 15 12:11:37 2011 -0400
@@ -558,14 +558,9 @@
         _uuid_generate_random(_buffer)
         return UUID(bytes=bytes_(_buffer.raw))
 
-    # Otherwise, get randomness from urandom or the 'random' module.
-    try:
-        import os
-        return UUID(bytes=os.urandom(16), version=4)
-    except:
-        import random
-        bytes = bytes_(random.randrange(256) for i in range(16))
-        return UUID(bytes=bytes, version=4)
+    # Otherwise, get randomness from the 'random' module.
+    import random
+    return UUID(int=random.getrandbits(128), version=4)
 
 def uuid5(namespace, name):
     """Generate a UUID from the SHA-1 hash of a namespace UUID and a name."""