Firt you need to define the Geom point you want to associate your vertex to.

Define a point by its coordinates:

`geom_object_vertex = geompy.MakeVertex(X, Y, Z)`

Define a point by reference:

`geom_object_vertex = geompy.MakeVertexWithRef(Reference, X,Y,Z)`

Define a point by an Edge and a Parameter:

`geom_object_vertex = geompy.MakeVertexOnCurve(Edge,Parameter)`

Define a point by an Edge and a Length:

`geom_object_vertex = geompy.MakeVertexOnCurveByLength(Edge,Length,StartPoint=None)`

Define a point by an Edge and Coordinates:

`geom_object_vertex = geompy.MakeVertexOnCurveByCoord(Edge,X,Y,Z)`

Define a point by intersection of two Lines or Wires (or a Wire and a Line):

`geom_object_vertex = geompy.MakePointOnLinesIntersection(myLine1,myWire1)`

Define a point by its position (U-V parameters) on a face:

`geom_object_vertex = geompy.MakeVertexOnSurface(myFace,myUParameter,myVParameter)`

Define a point by its position (Coordinates) on a face:

`geom_object_vertex = geompy.MakeVertexOnSurface(myFace,X,Y,Z)`

GUI: *Vertex Association*