Hi Dress 

Try using this as example :

    def fields_view_get(self, cr, uid, view_id=None, view_type='form', context=None, toolbar=False, submenu=False):
        if not context: context = {}
        res = super(your_class_name, self).fields_view_get(cr, uid, view_id=view_id, view_type=view_type, context=context, toolbar=toolbar, submenu=submenu)
        #call your_function_here        
        doc = etree.XML(res['arch'])
        if your_function_condition :
            nodes_your_field_name = doc.xpath("//field[@name='your_field_name']")
            for node in nodes_your_field_name:
                node.set('invisible', 'True')
        res['arch'] = etree.tostring(doc)
        return res

Don't forget to import the library

from lxml import etree

Here is the XML code.

                                        <field name="structure_salariale" on_change="onchange_structure(structure_salariale,type_id)" attrs="{'invisible':[('name_contract','in', ['Mandataire','SIVP'])], 'required':[('name_contract','not in', ['Mandataire','SIVP'])]}"/>

But, i want to use a function to controle this not in xml.

But, question is can we use function with invisible attribute