def __init__ ( self, label = '', image = None, values_trait = None, style = 'button',
                         orientation = 'vertical', width_padding = 7,
                         height_padding = 5, view = None, **metadata ):
        self.label = label
        self.values_trait = values_trait
        self.image = image
        self.style = style
        self.orientation = orientation
        self.width_padding = width_padding
        self.height_padding = height_padding
        self.view = view
        super( Button, self ).__init__( **metadata )
Unread a single line of data into the readahead buffer.
dataset/ETHPy150Open enthought/traits/traits/trait_types.py/Button.__init__--crossover with--dataset/ETHPy150Open natestedman/Observatory/observatory/lib/dulwich/protocol.py/Protocol.unread_pkt_line