[PHP] __unset [Python] 
__delattr__
_ _ g e t a t t r _ _
_ _ s e t a t t r _ _
n o t a v a i l a b l e
_ _ d e l a t t r _ _
_ _ i n i t _ _
_ _ d e l _ _
_ _ c a l l _ _
_ _ g e t i t e m _ _
_ _ s e t i t e m _ _
_ _ d e l i t e m _ _