Upport the "mark invoice as sent" wizard from v8 to v10

PEP8 on account_usability

account_usability/wizard/__init__.py

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+# -*- encoding: utf-8 -*-
+
+from . import account_invoice_mark_sent

account_usability/wizard/account_invoice_mark_sent.py

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+# -*- coding: utf-8 -*-
+# © 2017 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp import models
+import logging
+logger = logging.getLogger(__name__)
+
+
+class AccountInvoiceMarkSent(models.TransientModel):
+    _name = 'account.invoice.mark.sent'
+    _description = 'Mark invoices as sent'
+
+    def run(self):
+        assert self.env.context.get('active_model') == 'account.invoice',\
+            'Source model must be invoices'
+        assert self.env.context.get('active_ids'), 'No invoices selected'
+        invoices = self.env['account.invoice'].search([
+            ('id', 'in', self.env.context.get('active_ids')),
+            ('state', 'in', ('open', 'paid'))])
+        invoices.write({'sent': True})
+        logger.info('Marking invoices with ID %s as sent', invoices.ids)
+        return

account_usability/wizard/account_invoice_mark_sent_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    © 2017 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
+    The licence is in the file __openerp__.py
+-->
+
+<odoo>
+
+<record id="account_invoice_mark_sent_form" model="ir.ui.view">
+    <field name="name">account.invoice.mark.sent.form</field>
+    <field name="model">account.invoice.mark.sent</field>
+    <field name="arch"  type="xml">
+        <form string="Mark invoices as sent">
+            <p>
+                This wizard will mark as <i>sent</i> all the selected invoices in open or paid state.
+            </p>
+            <footer>
+                <button type="object" name="run" string="Mark as Sent" class="btn-primary"/>
+                <button special="cancel" string="Cancel" class="oe_link"/>
+            </footer>
+        </form>
+    </field>
+</record>
+
+<act_window id="account_invoice_mark_sent_action"
+            multi="True"
+            key2="client_action_multi"
+            name="Mark as Sent"
+            res_model="account.invoice.mark.sent"
+            src_model="account.invoice"
+            view_mode="form"
+            target="new"
+            groups="account.group_account_invoice" />
+
+</odoo>