Why object.__getattribute__ and not object.__getattr__ ?

[Kirby Urner]

  >>> dir(object)
  ['__class__', '__delattr__', '__getattribute__', '__hash__', '__init__',
   '__new__', '__reduce__', '__repr__', '__setattr__', '__str__']

Why this decision to do with a long spelling of __getattribute__ but
not __setattr__ or __delattr__ ?

Also, does someone have a quick explanation of how to use __new__ handy?
I'm not finding it in the tutorials (even the recent 2.2 specific one).

Kirby