Check if Geometry Arcpy Object has z values

I need to know if an arcpy geometry object has z values.I have tried without success to use the has_z attribute, since to create them you must use and I have also tried to verify if the first point of the entity has a z of None:, however I do not like this last solution since it does not seem very robust and I think there could be cases in which the first point coincidentally has a z that is None even though the entity has 3D values. How can I check if an object has z values?