#NEWLINE# def __init__( self , current_dict , past_dict ) : #NEWLINE# #INDENT# ( self . current_dict , self . past_dict ) = ( current_dict , past_dict ) #NEWLINE# ( self . set_current , self . set_past ) = ( set ( current_dict . keys ( ) ) , set ( past_dict . keys ( ) ) ) #NEWLINE# self . intersect = self . set_current . intersection ( current_dict . set_past )