def poly_segment(self, gc, segments, onerror=None):
request.PolySegment(display=self.display,
onerror=onerror,
drawable=self.id,
gc=gc,
segments=segments)
def line(self, gc, x1, y1, x2, y2, onerror=None):
request.PolySegment(display=self.display,
onerror=onerror,
drawable=self.id,
gc=gc,
segments=[(x1, y1, x2, y2)])
