[FIX] Fixed Travis

contract_sale/models/contract.py

@@ -38,11 +38,14 @@ class ContractContract(models.Model):
 
                     # Check Invoice and If It's Not Created then Updated Qty
                     for order_id in order_ids:
-                        invoice_ids = order_id.order_line.mapped('invoice_lines')
+                        invoice_ids =\
+                            order_id.order_line.mapped('invoice_lines')
                         if not invoice_ids:
                             for line in order_id.order_line:
-                                if line.product_id.id == invoice_line_values.get('product_id', False):
-                                    invoice_line_values['quantity'] += line.product_uom_qty
+                                if line.product_id.id == invoice_line_values.\
+                                        get('product_id', False):
+                                    invoice_line_values['quantity'
+                                        ] += line.product_uom_qty
 
                     invoice_values['invoice_line_ids'].append(
                         (0, 0, invoice_line_values)

contract_sale/models/sale_order.py

@@ -1,5 +1,5 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
-from odoo import api, fields, models
+from odoo import fields, models
 
 
 class SaleOrder(models.Model):