polyop.getEdgeVerts <Poly poly> <int edge>Returns the edge's vertices as a two element array.
<array_array> polyop.getEdgesVerts <Poly poly> <edgelist>Available in 3ds Max 2018.2 and higher: Returns the vertices of the specified edges as an array of two element arrays.
polyop.getEdgeFaces <Poly poly> <int edge>Returns the faces using the specified edge. Normally a one element (open edge) or two element array.
<array_array>polyop.getEdgesFaces <Poly poly> <edgelist>Available in 3ds Max 2018.2 and higher: Returns the faces using the specified edges.