The default repr of Python object is formatted using the following pattern: <{typename} object at {address:#x}> And many custom reprs use similar patterns, but add some additional type specific information. The type name first, followed by details and address. All is surrounded by angle quotes. The question is in what order to show address and other details? Should the address be at rear or in the middle? <{typename} {details} at {address:#x}> <{typename} at {address:#x} {details}> There are examples of both ways in the stdlib. I am going to add new custom reprs [1] and need to know what pattern looks better. Also, is "object" mandatory after the type name? <{typename} object {details} at {address:#x}> <{typename} object at {address:#x} {details}> [1] https://bugs.python.org/issue24391