def __init__(self, key, data):
        """ leaf entries get the previous key a an argument. """
        super(BaseLeafEntry, self).__init__(data)
        self.key = key[:self.indent] + self.key
def __init__ ( self , key , data ) : super ( BaseLeafEntry , self ) . __init__ ( data ) self . key = key [ : self . indent ] + self . key
leaf entries get the previous key a an argument.