def _effective_value(self, attr_name):
        directly_applied_value = getattr(
            super(_InheritsDimensions, self), attr_name
        )
        if directly_applied_value is not None:
            return directly_applied_value
        return self._inherited_value(attr_name)
The effective value of *attr_name* on this placeholder shape; its
dataset/ETHPy150Open scanny/python-pptx/pptx/shapes/placeholder.py/_InheritsDimensions._effective_value