Follow isort formatting

issue10928

.isort.cfg

@@ -0,0 +1,3 @@
+[settings]
+multi_line_output=4
+known_first_party=trytond

__init__.py

@@ -2,10 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import sale
-from . import purchase
-from . import stock
-from . import product
+
+from . import product, purchase, sale, stock
 
 
 def register():

purchase.py

@@ -4,8 +4,8 @@ from functools import wraps
 
 from trytond.model import ModelView, Workflow, fields
 from trytond.pool import Pool, PoolMeta
-from trytond.transaction import Transaction
 from trytond.tools import grouped_slice
+from trytond.transaction import Transaction
 
 
 class Request(metaclass=PoolMeta):

setup.py

@@ -6,7 +6,8 @@ import io
 import os
 import re
 from configparser import ConfigParser
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def read(fname):

tests/test_sale_supply.py

@@ -1,11 +1,11 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-import unittest
 import doctest
+import unittest
+
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
 
 
 class SaleSupplyTestCase(ModuleTestCase):