Fill in the Blanks Tad pilas función pythonOnline version TAD pilas función python by María Dolores 1 Lage Veiga 1 __init__ e is_empty first PositionalList LinkedPositionalList add_first super super e add_last is_empty delete is_empty class StackB ( / ) : def_init ( self ) : ( ) . ( ) def pushBottom ( self , e ) : self . ( ) def push ( self , e ) : self . ( ) def pop ( self ) : if not self . ( ) : return ( self . ( self . ( ) ) ) #o no definir ya que se hereda def ( self ) : return ( ) . ( )