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Inconsistent error messages when returning the wrong type for the type-conversion magic methods #130821

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easyinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-featureA feature request or enhancement
@mxgordon

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@mxgordon

Bug report

Bug description:

I noticed the error messages between magic methods like__int__ and__float__ were inconsistent. This seems like slightly undesirable behavior to me. I used the following code to generate many of them.

classFoo:def__int__(self):returnNonedef__float__(self):returnNonedef__bytes__(self):returnNonedef__complex__(self):returnNonedef__bool__(self):returnNonedef__str__(self):returnNonetry:int(Foo())exceptExceptionase:print(e)try:float(Foo())exceptExceptionase:print(e)try:bytes(Foo())exceptExceptionase:print(e)try:complex(Foo())exceptExceptionase:print(e)try:bool(Foo())exceptExceptionase:print(e)try:str(Foo())exceptExceptionase:print(e)

And the output is as follows:

__int__returnednon-int (typeNoneType)Foo.__float__returnednon-float (typeNoneType)__bytes__returnednon-bytes (typeNoneType)__complex__returnednon-complex (typeNoneType)__bool__shouldreturnbool,returnedNoneType__str__returnednon-string (typeNoneType)

The first issue I've made, but seems like a reasonable bug. I'm not sure if there are other "type-conversion" magic methods out there that aren't consistent.

CPython versions tested on:

3.13, 3.12

Operating systems tested on:

Windows

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