#NEWLINE# def pop( self , key , default = missing ) : #NEWLINE# #INDENT# if ( default is missing ) : #NEWLINE# #INDENT# return dict . pop ( self , key ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# if ( key not in self ) : #NEWLINE# #INDENT# return default #NEWLINE# #UNINDENT# #UNINDENT# self . _keys . remove ( key ) #NEWLINE# return dict . pop ( self , key , default )