Unwrapping type from PyObject*

[Flower lady]

Hi folks,

Does anybody know of a way to obtain a custom type from a PyObject* representing that type, assuming it is registered with PythonQt and all that? e.g., Can I have the following:

MyType* get_object(PyObject* o){
...
}

I would like to be able to do this because I can't cleanly overload my function to have something like:

MyType* get_object(PyObject* o){
... Do stuff to o...
MyType* myTypeO = toMyType(o); // How can I do this?
return myTypeO;
}
MyType* get_object(MyType* o){
... Do stuff to o...
return o;
}

With this overload in my CPP decorator class, PythonQt always seems to prefer to run the first method, even if the argument is of MyType*. I could simply not have a method version that takes a PyObject* argument to avoid the ambiguity, but then I'd be unable to pass in the Python types that I need.

[Florian Link]

Have you tried changing the order of the slots? The more specific overload
needs to come first, I think. But yes, you can do a type check for PythonQt
wrappers and get the wrapped ptr from a wrapper. There is no example, but
you can see it in PythonQtConversion and PythonQtClassInfo how to do this.

On Fri 27. Dec 2019 at 06:02, Flower lady fancyflowerlady@users.sourceforge.net wrote:

Hi folks,

Does anybody know of a way to obtain a custom type from a PyObject*
representing that type, assuming it is registered with PythonQt and all
that? e.g., Can I have the following:

MyType* get_object(PyObject* o){ ... }

I would like to be able to do this because I can't cleanly overload my
function to have something like:
MyType* get_object(PyObject* o){ ... Do stuff to o... MyType* myTypeO = toMyType(o); // How can I do this? return myTypeO; } MyType* get_object(MyType* o){ ... Do stuff to o... return o; }
With this overload in my CPP decorator class, PythonQt always seems to
prefer to run the first method, even if the argument is of MyType*. I
could simply not have a method version that takes a PyObject* argument to
avoid the ambiguity, but then I'd be unable to pass in the Python types
that I need.

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Unwrapping type from PyObject*

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[Flower lady]

Thanks Florian, can't believe it was as simple as switching the order! I'll look into PythonQtConversion should the need arise, but I think I'm all set!

[Flower lady]

I should add that I've tried:

        MyType* myTypeO = (MyType*)PythonQt::self()->priv()->unwrapForeignWrapper("MyType", o);

But unfortunately, this doesn't seem to work, since I don't have a foreign wrapper factory (I'm not even sure what that is).

Thanks!