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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _compute_edges(self):
 """Compute the edges of the current surface. Returns: Tuple[~curve.Curve, ~curve.Curve, ~curve.Curve]: The edges of the surface. """

        nodes1, nodes2, nodes3 = _surface_helpers.compute_edge_nodes(
            self._nodes, self._degree
        )
        edge1 = _curve_mod.Curve(nodes1, self._degree, _copy=False)
        edge2 = _curve_mod.Curve(nodes2, self._degree, _copy=False)
        edge3 = _curve_mod.Curve(nodes3, self._degree, _copy=False)
        return edge1, edge2, edge3