_objfinalizer.py 文件源码

def _do_finalize_object_ref(obj_ref):
        """Helper function for weakref.finalize() that dereferences a weakref
        to an object and calls its _do_finalize_object() method if the object
        is still alive. Does nothing otherwise.

        Returns: None (implicit)

        Arguments:
        * obj_ref -- weakref to an object
        """
        obj = obj_ref()
        if obj is not None:
            # else object disappeared
            obj._do_finalize_object()