createMesh.py

    # Create new mesh
    mesh = bpy.data.meshes.new(name)

    # Make a mesh from a list of verts/edges/faces.
    mesh.from_pydata(verts, edges, faces)

    # Update mesh geometry after adding stuff.
    mesh.update()

    # Deselect all objects when in object mode
    if bpy.ops.object.select_all.poll():
        bpy.ops.object.select_all(action='DESELECT')

    if edit:
        # Replace geometry of existing object

        # Use the active obj and select it.
        ob_new = obj_act
        ob_new.select = True

        if obj_act.mode == 'OBJECT':
            # Get existing mesh datablock.
            old_mesh = ob_new.data

            # Set object data to nothing
            ob_new.data = None

            # Clear users of existing mesh datablock.
            old_mesh.user_clear()

            # Remove old mesh datablock if no users are left.
            if (old_mesh.users == 0):
                bpy.data.meshes.remove(old_mesh)

            # Assign new mesh datablock.
            ob_new.data = mesh
    else:
        # Create new object
        ob_new = bpy.data.objects.new(name, mesh)

        # Link new object to the given scene and select it.
        scene.objects.link(ob_new)
        ob_new.select = True

        # Place the object at the 3D cursor location.
        # apply viewRotaion
        ob_new.matrix_world = align_matrix

    if obj_act and obj_act.mode == 'EDIT':
        if not edit:
            # We are in EditMode, switch to ObjectMode.
            bpy.ops.object.mode_set(mode='OBJECT')

            # Select the active object as well.
            obj_act.select = True

            # Apply location of new object.
            scene.update()

            # Join new object into the active.
            bpy.ops.object.join()

            # Switching back to EditMode.
            bpy.ops.object.mode_set(mode='EDIT')

            ob_new = obj_act

    else:
        # We are in ObjectMode.
        # Make the new object the active one.
        scene.objects.active = ob_new

    return ob_new


def Create_New_Mesh(props, context, align_matrix):

    verts = []
    faces = []
    # sMeshName =''  # UNUSED
    sObjName = ''

    if props.bf_Model_Type == 'bf_Model_Bolt':
        # print('Create Bolt')
        verts, faces = Bolt_Mesh(props, context)
        # sMeshName = 'Bolt'  # UNUSED
        sObjName = 'Bolt'

    if props.bf_Model_Type == 'bf_Model_Nut':
        # print('Create Nut')
        verts, faces = Nut_Mesh(props, context)
        # sMeshName = 'Nut'  # UNUSED
        sObjName = 'Nut'

    verts, faces = RemoveDoubles(verts, faces)

    verts = Scale_Mesh_Verts(verts, GLOBAL_SCALE)

    obj = create_mesh_object(context, verts, [], faces, sObjName,
                             props.edit, align_matrix)

    return obj