@property
    def ph_sz(self):
        ph = self.ph
        if ph is None:
            raise ValueError("not a placeholder shape")
        return ph.sz
Placeholder size, e.g. ST_PlaceholderSize.HALF, None if shape has no
dataset/ETHPy150Open scanny/python-pptx/pptx/oxml/shapes/shared.py/BaseShapeElement.ph_sz