issue while evaluating MMA expression in Python about wolframclientforpython HOT 6 CLOSED

   from wolframclient.evaluation import WolframLanguageSession
   from wolframclient.language import wl, wlexpr, Global

    session = WolframLanguageSession()

    edges = [(1, 2), (1, 3), (1, 4), (2, 5), (2, 6), (5, 6), (3, 4), (3, 7), (6, 7), (7, 8), (2, 9)]
    vl = [1, 2, 3, 4, 5, 6, 7, 8, 9]
    ew = {(1, 2): 49.6, (1, 3): 74.4, (1, 4): 49.6, (2, 5): 37.2, (2, 6): 74.4, (5, 6): 49.6, (3, 4): 37.2, (3, 7): 24.8, (6, 7): 62, (7, 8): 37.2, (2, 9): 24.8}
    vd = {1: [75., 25., 0], 2: [115., 45., 0], 3: [10., 5., 0], 4: [45., 0, 0], 5: [90., 60., 0], 6: [45., 55., 0], 7: [0, 25., 0], 8: [10., 50., 0], 9: [115., 25., 0]}
    with WolframLanguageSession() as s:
        solution3d = wl.Get('test.m')
        s.evaluate(Global.solution3d(edges, vd, vl, ew))

solution3d[edges_, vd_, vl_, ew_] := (

    {edges,vl,ew,vd}=ImportString[#,"PythonExpression"]&/@{edges,vl,ew,vd};
    edges = UndirectedEdge @@@ edges; vcoords = List @@ vd;
    ew = Normal @ KeyMap[UndirectedEdge @@ # &,ew];

    g3d = Graph3D[vl, edges, VertexCoordinates -> vcoords, EdgeWeight->ew, VertexLabels->Placed["Name",Center],
    EdgeLabels->{e_:>Placed["EdgeWeight",Center]}, VertexSize->.5, BaseStyle->16];

    edgeLengths3d = # -> Norm[vars3d[[First@#]] - vars3d[[Last@#]]] /.solution3d & /@ EdgeList[g3d];

    vars3d = Array[Through[{x, y, z}@#] &, Length@vd];
    \[Lambda] = 1/100.; lbnd = 0; ubnd = 500;

    obj3d = Total[(Norm[vars3d[[First@#]] - vars3d[[Last@#]]] - # /. (Rule @@@ ew))^2 & /@ EdgeList[g3d]] + \[Lambda] * Total[Norm /@ (vars3d - Values@vd)];
    solution3d = Last @ Minimize[{obj3d, And @@ Thread[lbnd <= Join @@ vars3d <= ubnd]}, Join @@ vars3d];

    edgeLengths3d = # -> Norm[vars3d[[First@#]] - vars3d[[Last@#]]] /.solution3d & /@ EdgeList[g3d];
    ResourceFunction["PrettyGrid"][{#, # /. ew, # /. edgeLengths3d} & /@EdgeList[g3d],  "ColumnHeadings" -> {"edge", "EdgeWeight", "Edge Length"}];

    z1 = Values[solution3d] // Partition[#, 3] &;

    theFile = File["result.txt"];

    Export[theFile, z1, "Table"];
)

 solution3d = wl.Get('test.m')
 s.evaluate(Global.solution3d(edges, vd, vl, ew))