MeshAlignVerts.py

import bpy
import bmesh

class MeshAlignVerts(bpy.types.Operator):
    bl_idname = "mesh.align_verts"
    bl_label = "Align verts pos"
    bl_options = {'REGISTER', 'UNDO'}

    unlocked = bpy.props.BoolProperty()
 
    def update_unlock(self, context):
        self.unlocked = True

    # update individual verts
    def update_indiv_vert_pos(self,context):
        mesh=bmesh.from_edit_mesh(context.object.data)
        sel_verts = []
        for v in mesh.verts:
            if v.select:
                sel_verts.append(v)
      
        # TODO: Add logic to move points along custom defined transform orientation
        #   bpy.context.space_data.transform_orientation = 'GLOBAL'
      
        for v in sel_verts:
            if self.chosen_axis == 'X':
                v.co.x = self.x_pos
            if self.chosen_axis == 'Y':
                v.co.y = self.y_pos
            if self.chosen_axis == 'Z':
                v.co.z = self.z_pos

    x_pos = bpy.props.FloatProperty(name="X",description="X axis",default=0.0, update=update_unlock)
    y_pos = bpy.props.FloatProperty(name="Y",description="Y axis",default=0.0, update=update_unlock)
    z_pos = bpy.props.FloatProperty(name="Z",description="Z axis",default=0.0, update=update_unlock)

    chosen_axis = bpy.props.EnumProperty(
        items=(('X','X','Align along X axis'),('Y','Y','Align along Y axis'),('Z','Z','Align along Z axis')),
        name="Choose Axis",
        update=update_unlock)

    def execute(self,context):
        print (self.chosen_axis)
        if self.unlocked:
            self.update_indiv_vert_pos(context)
        print ("Executed script")
        return {'FINISHED'}


def register():
    bpy.utils.register_class(MeshAlignVerts)

def unregister():
    bpy.utils.unregister_class(MeshAlignVerts)

if __name__ == "__main__":
    register()