Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.

Did you read the documentation and troubleshoot guide?

• I have read the documentation and troubleshoot guide

Environment

** Sage 10.0.betas ** and earlier

Steps To Reproduce

sage: L = {0}
sage: L == Set(L)
True
sage: L != Set(L)
True

Expected Behavior

!= should be the negation of ==

Actual Behavior

both == and != comparisons being True is pretty bad

Additional Information

No response