odoo中的XML

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odoo中，xml可以通过context来写入吗？ 可以

odoo中LXML的用法

lxml.builder可以建立XML

odoo 中的xml除开手写，继承的方式展现。
另外，还可以通过context的方式来实现获取，将数据写在context中，可以直接获取到context的数据

案例：

针对某一个视图修改：

功能点权限页面视图的显示

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view_function = self.env.ref('base.user_groups_view_function', raise_if_not_found=False)
    if view_function and view_function.exists() and view_function._name == 'ir.ui.view':
        group_no_one = view_function.env.ref('base.group_no_one')
        xml1, xml2 = [], []
        xml1.append(E.separator(string=_('Application'), colspan="2"))
        for app, kind, gs in self.get_groups_by_application():
            # hide groups in categories 'Hidden' and 'Extra' (except for group_no_one)
            attrs = {}
            if app.xml_id in (
                    'base.module_category_hidden', 'base.module_category_extra', 'base.module_category_usability'):
                attrs['groups'] = 'base.group_no_one'

            if kind == 'selection':
                # application name with a selection field
                field_name = name_selection_groups(gs.ids)
                xml1.append(E.field(name=field_name, **attrs))
                xml1.append(E.newline())
            else:
                # application separator with boolean fields
                app_name = app.name or _('Other')
                xml2.append(E.separator(string=app_name, colspan="4", **attrs))
                for g in gs:
                    field_name = name_boolean_group(g.id)
                    if g == group_no_one:
                        # make the group_no_one invisible in the form view
                        xml2.append(E.field(name=field_name, invisible="1", **attrs))
                    elif g.classification in ('function_access', 'data_access'):
                        xml2.append(E.field(name=field_name, **attrs))
                    else:
                        xml2.append(E.field(name=field_name, invisible="1", **attrs))

        xml2.append({'class': "o_label_nowrap"})
        xml = E.field(E.group(*(xml1), col="2"), E.group(*(xml2), col="4"), name="groups_id", position="replace")
        xml.addprevious(etree.Comment("GENERATED AUTOMATICALLY BY GROUPS"))
        xml_content = etree.tostring(xml, pretty_print=True, xml_declaration=True, encoding="utf-8")
        view_function.with_context(lang=None).write({'arch': xml_content, 'arch_fs': False})