Hi Robin, seeing that no one replied to your question, I'd suggest to ask this on the Python C-API ML:
https://mail.python.org/mailman3/lists/capi-sig.python.org/ That's where the experts are, including the ones who implemented the mutli-phase logic. Cheers, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Sep 27 2021) >>> Python Projects, Coaching and Support ... https://www.egenix.com/ >>> Python Product Development ... https://consulting.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 https://www.egenix.com/company/contact/ https://www.malemburg.com/ On 21.09.2021 14:08, Robin Becker wrote: > I have a c extension which is intended to implement a module the looks > structurally like this > > > ############ > a = 1 > b = 2 > > class T: > def __init__(self): > self.a = a > self.b = b > ############ > > so when an object of type T is instantiated it can set up defaults based on > the > current module values of a and b. > > In the past using old style single phase module creation the init function for > the type could look up the module by using the PyState_FindModule function. In > the new world where we can implement c extensions which might work with > multiple > interpreters (multi-phase creation). The docs say PyState_FindModule won't > work > for those and indeed it returns NULL so is useless. > > Is there a way I can set the current module onto the type definition during > the > module's exec function? I thought it would be easy to add at the point in the > exec where I'm doing this to the module, m, > > TType.tp_base = &PyBaseObject_Type; > if(PyType_Ready(&TType)<0) goto fail; > if(PyModule_AddObject(m,"T", (PyObject *)&TType)<0) goto fail; > > but I don't see the place in the type where I can add these sorts of dynamic > attributes. The basic_size is for the created objects. > > The created type does have a __dict__ which is a mappingproxy. I wondered when > that actually gets instantiated. > > I can see that the type has a __module__ attribute after the module is > imported > and I suppose if I can find the 'current' interpreter I might use the > __module__ > to locate the module object via PyImport_GetModuleDict. > > Any expertise or advice gratefully received. > -- > Robin Becker > -- https://mail.python.org/mailman/listinfo/python-list
