Python Ctypes: Wraping C++ Class With Operators

I want to wrap a small test C++ class for use in python using ctypes. The class is called Edge and has a friend comparison (==) operator. I am having difficulty implementing the co

Solution 1:

Problem is, you're trying to cast a Python object to a void *, rather than the void * you already attached to that object's obj attribute.

It should be as simple as changing...

def__eq__(self, other):
    return lib.compare_edge(self.obj, c_void_p(other))

...to...

def__eq__(self, other):
    return lib.compare_edge(self.obj, other.obj)

The explicit call to c_void_p should be unnecessary, since you already declared the types in the line...

lib.compare_edge.argtypes = [c_void_p, c_void_p]