How modify fields programmatically

How to change label for doctype fields programatically?
I have a custom app and I want to make a slight change to the label description from the code level during installation…MAYBE THROUGH TRANSLATIONS but i want to do it in code

My guess would be frappe.get_meta(doctype) or frappe.get_doc('DocType', doctype_name) and then edit and save it just like any other Document.


Ok then how to edit metadata? because I don’t know