Hello Irawan,

You can create dynamic tree view using fields_view_get method.

Example:

    from lxml import etree

     @api.model

        def fields_view_get(self, view_id=None, view_type=’tree’, context=None, toolbar=False,submenu=False): 

        result = super(model_name,self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)

        doc = etree.XML(result[‘arch’])

        if new_string:

        for node in doc.xpath(“//field[@name=’field_a’]”):

            node.set(‘string’, new_string)

        result[‘arch’] = etree.tostring(doc)

        return result

Hope this help.