capi-sig October 2017

capi-sig@python.org

2 participants
3 discussions

Software Development - Application Development - Game Development

by Gary

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2 weeks, 1 day

Re: [capi-sig] Is it ok to call PyBaseType_Object.tp_new from external code?

by Serhiy Storchaka

03.10.17 18:04, Łukasz Jagielski пише: > I've noticed that when calling PyBaseObject_Type.tp_new ( > https://github.com/python/cpython/blob/master/Objects/typeobject.c#L3608), > function excess_args is immediately called which assumes its first > parameter is a tuple. Problem is that tuple struct is bigger that Py_None, > correct me if I'm wrong. I've noticed code in swig which calls object_new > with both args and kwds being Py_None and reported an issue > for it (https://github.com/swig/swig/issues/1109). The question is whether > it's ok to call tp_new on a given PyTypeObject but the second > and third param should always be a tuple and a dict or should some other > api function be called instead? args should be a tuple, kwds should be NULL or a dict.

4 years, 3 months

Is it ok to call PyBaseType_Object.tp_new from external code?

by Łukasz Jagielski

Hi, I've noticed that when calling PyBaseObject_Type.tp_new ( https://github.com/python/cpython/blob/master/Objects/typeobject.c#L3608), function excess_args is immediately called which assumes its first parameter is a tuple. Problem is that tuple struct is bigger that Py_None, correct me if I'm wrong. I've noticed code in swig which calls object_new with both args and kwds being Py_None and reported an issue for it (https://github.com/swig/swig/issues/1109). The question is whether it's ok to call tp_new on a given PyTypeObject but the second and third param should always be a tuple and a dict or should some other api function be called instead? Thanks, Łukasz

4 years, 3 months

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capi-sig October 2017