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 9bfe4aade6..8820932def 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,11 +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.pool import Pool
-from . import asset
-from . import product
-from . import invoice
-from . import account
-from . import purchase
+
+from . import account, asset, invoice, product, purchase
 
 
 def register():
diff --git a/account.py b/account.py
index 90dd640014..8888b16a63 100644
--- a/account.py
+++ b/account.py
@@ -4,10 +4,10 @@ from trytond import backend
 from trytond.i18n import gettext
 from trytond.model import ModelSQL, fields
 from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, If, Bool, Id
-from trytond.pool import PoolMeta, Pool
-from trytond.tools.multivalue import migrate_property
 from trytond.modules.company.model import CompanyValueMixin
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Bool, Eval, Id, If
+from trytond.tools.multivalue import migrate_property
 
 asset_bymonthday = fields.Selection([
         ('1', "First"),
diff --git a/asset.py b/asset.py
index 2e42483562..7a1666ba35 100644
--- a/asset.py
+++ b/asset.py
@@ -1,24 +1,23 @@
 # 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 datetime
 import calendar
+import datetime
 from decimal import Decimal
-from dateutil import relativedelta
-from dateutil import rrule
 from itertools import groupby
 
+from dateutil import relativedelta, rrule
+
 from trytond.i18n import gettext
-from trytond.model import Workflow, ModelSQL, ModelView, fields, Unique
+from trytond.model import ModelSQL, ModelView, Unique, Workflow, fields
 from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, Bool, If
-from trytond.pool import Pool
-from trytond.tools import cached_property
-from trytond.transaction import Transaction
-from trytond.wizard import (Wizard, StateView, StateTransition, StateReport,
-    Button)
-from trytond.tools import grouped_slice
 from trytond.modules.company import CompanyReport
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If
+from trytond.tools import cached_property, grouped_slice
+from trytond.transaction import Transaction
+from trytond.wizard import (
+    Button, StateReport, StateTransition, StateView, Wizard)
 
 from .exceptions import PrintDepreciationTableError
 
diff --git a/invoice.py b/invoice.py
index c84efea532..abb0daac65 100644
--- a/invoice.py
+++ b/invoice.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, Unique
-from trytond.pyson import Eval
+from trytond.model import Unique, fields
 from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 from trytond.transaction import Transaction
 
 
diff --git a/product.py b/product.py
index 70c0978274..96a412f9ba 100644
--- a/product.py
+++ b/product.py
@@ -2,10 +2,10 @@
 # repository contains the full copyright notices and license terms.
 from trytond import backend
 from trytond.model import fields
-from trytond.pyson import Eval
-from trytond.pool import PoolMeta, Pool
 from trytond.modules.account_product.product import (
     account_used, template_property)
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 
 
 class Category(metaclass=PoolMeta):
diff --git a/purchase.py b/purchase.py
index cb2749820d..affe9ec63c 100644
--- a/purchase.py
+++ b/purchase.py
@@ -1,9 +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.i18n import gettext
-from trytond.pool import PoolMeta
-
 from trytond.modules.account_product.exceptions import AccountError
+from trytond.pool import PoolMeta
 
 
 class Line(metaclass=PoolMeta):
diff --git a/setup.py b/setup.py
index ada9366885..bdf4005054 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/tests/test_account_asset.py b/tests/test_account_asset.py
index 63e3758d69..bd766ba828 100644
--- a/tests/test_account_asset.py
+++ b/tests/test_account_asset.py
@@ -1,14 +1,13 @@
 # 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 datetime as dt
-import unittest
 import doctest
-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
+import unittest
 
+import trytond.tests.test_tryton
 from trytond.modules.account_asset.asset import normalized_delta
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
 
 
 class AccountAssetTestCase(ModuleTestCase):