Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:

https://docs.python.org/3/library/unittest.mock.html#any

mock.ANY doesn't make any guarantees that this is a generic implementation that 
can be used to test equality against any object irrespective of the order to 
return True. It's documented only to be used for mock calls but there are many 
users using it for other objects too outside of mock assertions. mock.ANY also 
depends on the order so that mock.ANY.__eq__ is used but I am not sure about 
documenting the order here.

Would be helpful if Elizabeth presents a simplified example to evaluate if 
there are any bugs in the call comparison with ANY or to close it as third 
party as suggested. As noted in my PR comment there should be a test case for 
this change proposed to make sure someone doesn't change the order by accident 
in future : https://github.com/python/cpython/pull/14700#issuecomment-510342012

> Though some __eq__ implementations in the stdlib should be fixed too.

Curious about what problems that this example surface in the stdlib definition 
of __eq__ . Are you saying that there are Django model like __eq__ definitions 
where they return False when other's type is different?

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