Function py_get_scope

imperative/python/src/ops.cpp:160–162

std::unordered_map<mgb::Typeinfo*, PyTypeObject*> PyOp(OpDef)::ctype2pytype;

PyObject* py_get_scope(PyObject* obj, void* /* closure */) {
    return py::cast(reinterpret_cast<PyOp(OpDef)*>(obj)->op->scope()).release().ptr();
}

int py_set_scope(PyObject* obj, PyObject* value, void* /* closure */) {
    if (value == NULL) {