Odoo, see fields in XML but in grey

I want kow if it's possible to see the field with this value but I want this field can't be change or can't be included a value.

For example I want to display my product id of my application, the product_id is unique. I want to see my product_id but the field must be not change (grey).

my .py
    _columns = {  
# Product
        'clicshopping_products_id': fields.integer('Product Id', size=5, help="Id product table of ClicShopping must be unique"),
    }

and my xml
<field name="clicshopping_products_id"/>

Do you have an idea.

Thank you.