'Create a new parenthasis widget.
:type canvas: Tkinter.Canvas
:param canvas: This canvas widget\'s canvas.
:param child: The child widget.  ``child`` must not have a
parent.
:type child: CanvasWidget
:param attribs: The new canvas widget\'s attributes.'

def __init__(self, canvas, child, **attribs):

    self._child = child
    self._oparen = canvas.create_arc(1, 1, 1, 1, style='arc', start=90, extent=180)
    self._cparen = canvas.create_arc(1, 1, 1, 1, style='arc', start=(-90), extent=180)
    AbstractContainerWidget.__init__(self, canvas, child, **attribs)
