I want to call python function in java script. I tried but it's not working.

Here is the my  PY code: 

class CoustomModel(models.Model):
    _name = 'custom.model'

    new_field = fields.Char(string="test", required=False, )


    @api.model
    def my_function(self):
        print("Hello Word");


Here is the JavaScript
odoo.define('visio_learn_javascript.SampleWork', function (require) {
    "use strict";

    var rpc = require("web.rpc")
    var Model = require('web.Model');
    
    var custom_model = new Model('custom.model');
    custom_model.call('my_function');

});