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 d8269c6dfa..65af05d122 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,12 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import configuration
-from . import bom
-from . import product
-from . import production
-from . import stock
-from . import ir
+
+from . import bom, configuration, ir, product, production, stock
 
 
 def register():
diff --git a/bom.py b/bom.py
index f2294d4574..f58b93c964 100644
--- a/bom.py
+++ b/bom.py
@@ -1,9 +1,9 @@
 # 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, ModelSQL, DeactivableMixin, fields
-from trytond.wizard import Wizard, StateView, Button
-from trytond.pyson import Eval
+from trytond.model import DeactivableMixin, ModelSQL, ModelView, fields
 from trytond.pool import Pool
+from trytond.pyson import Eval
+from trytond.wizard import Button, StateView, Wizard
 
 
 class BOM(DeactivableMixin, ModelSQL, ModelView):
diff --git a/configuration.py b/configuration.py
index 30445759c7..60a37312a1 100644
--- a/configuration.py
+++ b/configuration.py
@@ -1,12 +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.
 from trytond import backend
-from trytond.model import ModelView, ModelSQL, ModelSingleton, fields
+from trytond.model import ModelSingleton, ModelSQL, ModelView, fields
+from trytond.modules.company.model import (
+    CompanyMultiValueMixin, CompanyValueMixin)
 from trytond.pool import Pool
 from trytond.pyson import Eval, Id
 from trytond.tools.multivalue import migrate_property
-from trytond.modules.company.model import (
-    CompanyMultiValueMixin, CompanyValueMixin)
 
 
 class Configuration(
diff --git a/product.py b/product.py
index 38f716a987..ba6e0e6502 100644
--- a/product.py
+++ b/product.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.
 from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, MatchMixin, fields, \
-    sequence_ordered
+from trytond.model import (
+    MatchMixin, ModelSQL, ModelView, fields, sequence_ordered)
 from trytond.model.exceptions import RecursionError
-from trytond.pyson import Eval, Get, If, Bool
 from trytond.pool import PoolMeta
+from trytond.pyson import Bool, Eval, Get, If
 
 
 class Template(metaclass=PoolMeta):
diff --git a/production.py b/production.py
index 84fb233937..46e6ea9ec2 100644
--- a/production.py
+++ b/production.py
@@ -9,18 +9,16 @@ from sql import Null
 from sql.conditionals import Coalesce
 
 from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, Workflow, fields, dualmethod
-from trytond.pyson import Eval, Bool, If
-from trytond.pool import Pool
-from trytond.transaction import Transaction
-
+from trytond.model import ModelSQL, ModelView, Workflow, dualmethod, fields
 from trytond.modules.company.model import employee_field, set_employee
 from trytond.modules.product import price_digits, round_price
 from trytond.modules.stock.shipment import ShipmentAssignMixin
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If
+from trytond.transaction import Transaction
 
 from .exceptions import CostWarning
 
-
 BOM_CHANGES = ['bom', 'product', 'quantity', 'uom', 'warehouse', 'location',
     'company', 'inputs', 'outputs']
 
diff --git a/setup.py b/setup.py
index 160d1a6fd1..f330b57e5f 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 db418eaf91..a832214fe0 100644
--- a/stock.py
+++ b/stock.py
@@ -1,8 +1,8 @@
 # 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 fields
-from trytond.pyson import Eval
 from trytond.pool import PoolMeta
+from trytond.pyson import Eval
 
 
 class Location(metaclass=PoolMeta):
diff --git a/tests/test_production.py b/tests/test_production.py
index 627c0c8041..dd1c738795 100644
--- a/tests/test_production.py
+++ b/tests/test_production.py
@@ -1,16 +1,14 @@
 # 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 datetime
+import doctest
+import unittest
 
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
-from trytond.pool import Pool
-
 from trytond.modules.company.tests import CompanyTestMixin
+from trytond.pool import Pool
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown, with_transaction)
 
 
 class ProductionTestCase(CompanyTestMixin, ModuleTestCase):