c++pythonreferenceweak

Python - how to check if weak reference is still available

I am passing some weakrefs from Python into C++ class, but C++ destructors are actively trying to access the ref when the real object is already dead, obviously it crashes...

Is there any Python C/API approach to find out if Python reference is still alive or any other known workaround for this ?

Thanks

Solution

  • If you call PyWeakref_GetObject on the weak reference it should return either Py_None or NULL, I forget which. But you should check if it's returning one of those and that will tell you that the referenced object is no longer alive.