Hi, below this code is helpful for you.

#view file:

<template id="my_assets_id" name="website assets for my module" inherit_id="website.theme">        <xpath expr="." position="inside">        <link rel="stylesheet" href="/website_my_module/static/src/css/my.css"/>        </xpath>    </template>

# __openerp__.py
 {
     'name': "CSS Example",
     'description': "new css example",
     'category': 'Generic Modules/Others',
     'depends': ['web'],
     'data': [],
     'css': ['static/src/css/my_css.css'],
 }