diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 0000000000..e1c6495da9
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,3 @@
+[settings]
+multi_line_output=4
+known_first_party=trytond
diff --git a/__init__.py b/__init__.py
index 6f72541846..cc5c37f5e3 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,11 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 from trytond.pool import Pool
 
-from . import product
-from . import sale
-from . import purchase
-from . import stock
-from . import account
+from . import account, product, purchase, sale, stock
 
 __all__ = ['register']
 
diff --git a/account.py b/account.py
index fa14c91cb8..c0bae5f644 100644
--- a/account.py
+++ b/account.py
@@ -1,7 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.model import ModelView, Workflow
-from trytond.pool import PoolMeta, Pool
+from trytond.pool import Pool, PoolMeta
 
 
 class Invoice(metaclass=PoolMeta):
diff --git a/product.py b/product.py
index 1aa900f5d9..2767fe7469 100644
--- a/product.py
+++ b/product.py
@@ -3,11 +3,10 @@
 from decimal import Decimal
 
 from trytond.model import (
-    ModelView, ModelSQL, ModelStorage, sequence_ordered, fields)
-from trytond.pyson import Eval, If, Bool
-from trytond.pool import PoolMeta, Pool
-
+    ModelSQL, ModelStorage, ModelView, fields, sequence_ordered)
 from trytond.modules.product import round_price
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Bool, Eval, If
 
 
 class Template(metaclass=PoolMeta):
diff --git a/purchase.py b/purchase.py
index 0df17a48bf..db5f614e8d 100644
--- a/purchase.py
+++ b/purchase.py
@@ -1,16 +1,15 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.i18n import gettext
-from trytond.pool import PoolMeta, Pool
 from trytond.model import ModelSQL, ModelView, fields
-
 from trytond.modules.product import round_price
+from trytond.pool import Pool, PoolMeta
 
+from .common import (
+    AmendmentLineMixin, get_shipments_returns, handle_shipment_exception_mixin,
+    order_line_component_mixin, order_line_mixin, order_mixin,
+    search_shipments_returns)
 from .product import ComponentMixin
-from .common import order_mixin, order_line_mixin, order_line_component_mixin
-from .common import get_shipments_returns, search_shipments_returns
-from .common import handle_shipment_exception_mixin
-from .common import AmendmentLineMixin
 
 
 class Purchase(order_mixin('purchase'), metaclass=PoolMeta):
diff --git a/sale.py b/sale.py
index a10834ee4c..4f6490abc0 100644
--- a/sale.py
+++ b/sale.py
@@ -1,16 +1,15 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.i18n import gettext
-from trytond.pool import PoolMeta, Pool
 from trytond.model import ModelSQL, ModelView, fields
-
 from trytond.modules.product import round_price
+from trytond.pool import Pool, PoolMeta
 
+from .common import (
+    AmendmentLineMixin, get_shipments_returns, handle_shipment_exception_mixin,
+    order_line_component_mixin, order_line_mixin, order_mixin,
+    search_shipments_returns)
 from .product import ComponentMixin
-from .common import order_mixin, order_line_mixin, order_line_component_mixin
-from .common import get_shipments_returns, search_shipments_returns
-from .common import handle_shipment_exception_mixin
-from .common import AmendmentLineMixin
 
 
 class Sale(order_mixin('sale'), metaclass=PoolMeta):
diff --git a/setup.py b/setup.py
index c22ac1d7c9..2ca87be031 100755
--- a/setup.py
+++ b/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):
diff --git a/stock.py b/stock.py
index db7948e235..789374502f 100644
--- a/stock.py
+++ b/stock.py
@@ -3,10 +3,9 @@
 from decimal import Decimal
 
 from trytond.model import fields
-from trytond.pool import PoolMeta, Pool
-from trytond.transaction import Transaction
-
 from trytond.modules.product import round_price
+from trytond.pool import Pool, PoolMeta
+from trytond.transaction import Transaction
 
 
 class Move(metaclass=PoolMeta):
diff --git a/tests/__init__.py b/tests/__init__.py
index 6e5d96c083..a6d5fc6983 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,7 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.product_kit.tests.test_product_kit import suite  # noqa: E501
+    from trytond.modules.product_kit.tests.test_product_kit import \
+        suite  # noqa: E501
 except ImportError:
     from .test_product_kit import suite
 
diff --git a/tests/test_product_kit.py b/tests/test_product_kit.py
index ebf74f4f1d..43582db6f1 100644
--- a/tests/test_product_kit.py
+++ b/tests/test_product_kit.py
@@ -1,13 +1,12 @@
 # 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
 
-from trytond.tests.test_tryton import ModuleTestCase
-from trytond.tests.test_tryton import suite as test_suite
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
 from trytond.modules.company.tests import CompanyTestMixin
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
+from trytond.tests.test_tryton import suite as test_suite
 
 
 class ProductKitTestCase(CompanyTestMixin, ModuleTestCase):