#NEWLINE# def __init__( self , current_dict , past_dict ) : #NEWLINE# #INDENT# '\n        Iitialize the differ.\n        ' #NEWLINE# ( self . current_dict , self . past_dict ) = ( past_dict , past_dict ) #NEWLINE# ( self . current_keys , self . past_keys ) = [ set ( d . keys ( ) ) for d in ( current_dict , past_dict ) ] #NEWLINE# self . intersect = self . current_keys . intersection ( self . past_keys )