On Apr 4, 12:41 pm, "7stud" <bbxx789_0... at yahoo.com> wrote: > According to Python in a Nutshell(p.102), a name that is a slot can > only be "bound"(i.e. assigned to) inside the class body. Upon closer reading, it actually says that the name "__slots__" has to be bound inside the class body for the slot restrictions to take effect.