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 f69316c3bf..e6c2e0a9c4 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,17 +2,10 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import account
-from . import configuration
-from . import company
-from . import fiscalyear
-from . import journal
-from . import move
-from . import move_template
-from . import party
-from . import period
-from . import tax
 
+from . import (
+    account, company, configuration, fiscalyear, journal, move, move_template,
+    party, period, tax)
 from .move import MoveLineMixin
 
 __all__ = ['register', 'MoveLineMixin']
diff --git a/account.py b/account.py
index ea11f8f60d..fbdaf292b4 100644
--- a/account.py
+++ b/account.py
@@ -1,33 +1,32 @@
 # 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 decimal import Decimal
 import datetime
 import operator
 from collections import defaultdict
-from itertools import zip_longest
+from decimal import Decimal
 from functools import wraps
+from itertools import zip_longest
 
 from dateutil.relativedelta import relativedelta
-from sql import Column, Null, Window, Literal
-from sql.aggregate import Sum, Max, Min
-from sql.conditionals import Coalesce, Case
+from sql import Column, Literal, Null, Window
+from sql.aggregate import Max, Min, Sum
+from sql.conditionals import Case, Coalesce
 
 from trytond.i18n import gettext
 from trytond.model import (
-    ModelView, ModelSQL, fields, Unique, sequence_ordered, tree)
+    ModelSQL, ModelView, Unique, fields, sequence_ordered, tree)
 from trytond.model.exceptions import AccessError
-from trytond.wizard import Wizard, StateView, StateAction, StateTransition, \
-    Button
-from trytond.report import Report
-from trytond.tools import reduce_ids, grouped_slice, lstrip_wildcard
-from trytond.pyson import Eval, If, PYSONEncoder, Bool
-from trytond.transaction import Transaction
-from trytond.pool import Pool
-
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If, PYSONEncoder
+from trytond.report import Report
+from trytond.tools import grouped_slice, lstrip_wildcard, reduce_ids
+from trytond.transaction import Transaction
+from trytond.wizard import (
+    Button, StateAction, StateTransition, StateView, Wizard)
 
-from .common import PeriodMixin, ActivePeriodMixin
-from .exceptions import SecondCurrencyError, ChartWarning
+from .common import ActivePeriodMixin, PeriodMixin
+from .exceptions import ChartWarning, SecondCurrencyError
 
 
 def inactive_records(func):
diff --git a/common.py b/common.py
index be5f925476..8df8c6e6a4 100644
--- a/common.py
+++ b/common.py
@@ -6,8 +6,8 @@ from sql import Literal
 from sql.conditionals import Coalesce
 
 from trytond.model import Model, fields
-from trytond.pyson import Eval, If, Bool
 from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If
 from trytond.transaction import Transaction
 
 
diff --git a/company.py b/company.py
index cd85f1aeef..0c4f22e5fe 100644
--- a/company.py
+++ b/company.py
@@ -2,7 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 from trytond.i18n import gettext
 from trytond.model.exceptions import AccessError
-from trytond.pool import PoolMeta, Pool
+from trytond.pool import Pool, PoolMeta
 from trytond.transaction import Transaction
 
 
diff --git a/configuration.py b/configuration.py
index 2496704f58..1f9f4ed3ea 100644
--- a/configuration.py
+++ b/configuration.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.pool import Pool
-from trytond.model import ModelView, ModelSQL, ModelSingleton, fields
-from trytond.transaction import Transaction
-from trytond.pyson import Eval, Id
+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.transaction import Transaction
 
 tax_roundings = [
     ('document', 'Per Document'),
diff --git a/fiscalyear.py b/fiscalyear.py
index 83451c37a9..92be927542 100644
--- a/fiscalyear.py
+++ b/fiscalyear.py
@@ -4,17 +4,18 @@
 from dateutil.relativedelta import relativedelta
 
 from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, Workflow, fields
+from trytond.model import ModelSQL, ModelView, Workflow, fields
 from trytond.model.exceptions import AccessError
 from trytond.pool import Pool
 from trytond.pyson import Eval, Id
 from trytond.rpc import RPC
 from trytond.transaction import Transaction
 from trytond.wizard import (
-    Wizard, StateView, StateTransition, StateAction, Button)
+    Button, StateAction, StateTransition, StateView, Wizard)
 
-from .exceptions import (FiscalYearNotFoundError, FiscalYearDatesError,
-    FiscalYearSequenceError, FiscalYearCloseError, FiscalYearReOpenError)
+from .exceptions import (
+    FiscalYearCloseError, FiscalYearDatesError, FiscalYearNotFoundError,
+    FiscalYearReOpenError, FiscalYearSequenceError)
 
 STATES = {
     'readonly': Eval('state') != 'open',
diff --git a/journal.py b/journal.py
index 498ee72a34..4949a2ba5f 100644
--- a/journal.py
+++ b/journal.py
@@ -7,16 +7,16 @@ from sql.aggregate import Sum
 from trytond import backend
 from trytond.i18n import gettext
 from trytond.model import (
-    ModelView, ModelSQL, Workflow, DeactivableMixin, fields, Unique)
+    DeactivableMixin, ModelSQL, ModelView, Unique, Workflow, fields)
 from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, Bool, Id
-from trytond.transaction import Transaction
-from trytond.pool import Pool
-from trytond.tools import reduce_ids, grouped_slice, lstrip_wildcard
-from trytond.tools.multivalue import migrate_property
 from trytond.modules.company.model import (
     CompanyMultiValueMixin, CompanyValueMixin)
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, Id
+from trytond.tools import grouped_slice, lstrip_wildcard, reduce_ids
+from trytond.tools.multivalue import migrate_property
+from trytond.transaction import Transaction
 
 STATES = {
     'readonly': Eval('state') == 'close',
diff --git a/move.py b/move.py
index 9baa500f0a..a8aff3fc59 100644
--- a/move.py
+++ b/move.py
@@ -1,35 +1,35 @@
 # 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 decimal import Decimal
-from itertools import groupby, combinations, chain, islice
-from operator import itemgetter
 from collections import defaultdict
+from decimal import Decimal
+from itertools import chain, combinations, groupby, islice
+from operator import itemgetter
 
 from dateutil.relativedelta import relativedelta
-from sql import Null, Literal
-from sql.aggregate import Sum, Max
+from sql import Literal, Null
+from sql.aggregate import Max, Sum
+from sql.conditionals import Case, Coalesce
 from sql.functions import CharLength
-from sql.conditionals import Coalesce, Case
 
-from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, fields, Check, DeactivableMixin
-from trytond.model.exceptions import AccessError
-from trytond.wizard import (
-    Wizard, StateTransition, StateView, StateAction, Button)
-from trytond.report import Report
 from trytond import backend
-from trytond.pyson import Eval, Bool, If, PYSONEncoder
-from trytond.transaction import Transaction
-from trytond.pool import Pool
-from trytond.rpc import RPC
-from trytond.tools import reduce_ids, grouped_slice
 from trytond.config import config
-
+from trytond.i18n import gettext
+from trytond.model import Check, DeactivableMixin, ModelSQL, ModelView, fields
+from trytond.model.exceptions import AccessError
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If, PYSONEncoder
+from trytond.report import Report
+from trytond.rpc import RPC
+from trytond.tools import grouped_slice, reduce_ids
+from trytond.transaction import Transaction
+from trytond.wizard import (
+    Button, StateAction, StateTransition, StateView, Wizard)
 
-from .exceptions import (PostError, MoveDatesError, CancelWarning,
-    ReconciliationError, DeleteDelegatedWarning, GroupLineError,
-    SplitLineError, CancelDelegatedWarning)
+from .exceptions import (
+    CancelDelegatedWarning, CancelWarning, DeleteDelegatedWarning,
+    GroupLineError, MoveDatesError, PostError, ReconciliationError,
+    SplitLineError)
 
 _MOVE_STATES = {
     'readonly': Eval('state') == 'posted',
diff --git a/move_template.py b/move_template.py
index a7696d29db..450c3fe8b3 100644
--- a/move_template.py
+++ b/move_template.py
@@ -1,18 +1,18 @@
 # 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 xml.sax.saxutils import quoteattr
 from decimal import Decimal
+from xml.sax.saxutils import quoteattr
 
 from simpleeval import simple_eval
 
 from trytond.model import (
-    ModelSQL, ModelView, DeactivableMixin, fields, sequence_ordered)
-from trytond.pyson import Eval
-from trytond.wizard import (Wizard, StateView, StateAction, StateTransition,
-    Button)
-from trytond.transaction import Transaction
+    DeactivableMixin, ModelSQL, ModelView, fields, sequence_ordered)
 from trytond.pool import Pool
+from trytond.pyson import Eval
 from trytond.tools import decistmt
+from trytond.transaction import Transaction
+from trytond.wizard import (
+    Button, StateAction, StateTransition, StateView, Wizard)
 
 
 class MoveTemplate(DeactivableMixin, ModelSQL, ModelView):
diff --git a/party.py b/party.py
index bc442b96ac..7e5c842f41 100644
--- a/party.py
+++ b/party.py
@@ -9,15 +9,15 @@ from sql.conditionals import Coalesce
 from trytond import backend
 from trytond.i18n import gettext
 from trytond.model import ModelSQL, fields
-from trytond.pyson import Eval, If
-from trytond.transaction import Transaction
-from trytond.pool import Pool, PoolMeta
-from trytond.tools import reduce_ids, grouped_slice
-from trytond.tools.multivalue import migrate_property
 from trytond.modules.company.model import (
     CompanyMultiValueMixin, CompanyValueMixin)
-from trytond.modules.party.exceptions import EraseError
 from trytond.modules.currency.fields import Monetary
+from trytond.modules.party.exceptions import EraseError
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval, If
+from trytond.tools import grouped_slice, reduce_ids
+from trytond.tools.multivalue import migrate_property
+from trytond.transaction import Transaction
 
 from .exceptions import AccountMissing
 
diff --git a/period.py b/period.py
index 27158c01c0..b0a8a265b5 100644
--- a/period.py
+++ b/period.py
@@ -1,16 +1,17 @@
 # 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.const import OPERATORS
 from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, Workflow, fields
+from trytond.model import ModelSQL, ModelView, Workflow, fields
 from trytond.model.exceptions import AccessError
+from trytond.pool import Pool
 from trytond.pyson import Eval, Id
 from trytond.transaction import Transaction
-from trytond.pool import Pool
-from trytond.const import OPERATORS
 
-from .exceptions import (PeriodNotFoundError, ClosePeriodError,
-    PeriodDatesError, PeriodSequenceError)
+from .exceptions import (
+    ClosePeriodError, PeriodDatesError, PeriodNotFoundError,
+    PeriodSequenceError)
 
 _STATES = {
     'readonly': Eval('state') != 'open',
diff --git a/setup.py b/setup.py
index 5d53e992ac..93e287b297 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/tax.py b/tax.py
index 55bce01dc0..d9eb4fbc97 100644
--- a/tax.py
+++ b/tax.py
@@ -9,21 +9,20 @@ from sql import Literal
 from sql.aggregate import Sum
 from sql.conditionals import Case
 
+from trytond import backend
 from trytond.i18n import gettext
 from trytond.model import (
-    ModelView, ModelSQL, MatchMixin, DeactivableMixin, fields,
+    DeactivableMixin, MatchMixin, ModelSQL, ModelView, fields,
     sequence_ordered, tree)
 from trytond.model.exceptions import AccessError
-from trytond.wizard import Wizard, StateView, StateAction, Button
-from trytond import backend
-from trytond.pyson import Eval, If, Bool, PYSONEncoder
-from trytond.transaction import Transaction
-from trytond.tools import cursor_dict, lstrip_wildcard
-from trytond.pool import Pool
-
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If, PYSONEncoder
+from trytond.tools import cursor_dict, lstrip_wildcard
+from trytond.transaction import Transaction
+from trytond.wizard import Button, StateAction, StateView, Wizard
 
-from .common import PeriodMixin, ActivePeriodMixin
+from .common import ActivePeriodMixin, PeriodMixin
 
 KINDS = [
     ('sale', 'Sale'),
diff --git a/tests/__init__.py b/tests/__init__.py
index d7b7c93620..251f78752e 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -3,8 +3,8 @@
 
 try:
     from trytond.modules.account.tests.test_account import (
-        suite, create_chart, get_fiscalyear)
+        create_chart, get_fiscalyear, suite)
 except ImportError:
-    from .test_account import suite, create_chart, get_fiscalyear
+    from .test_account import create_chart, get_fiscalyear, suite
 
 __all__ = ['suite', 'create_chart', 'get_fiscalyear']
diff --git a/tests/test_account.py b/tests/test_account.py
index 6ff9524af9..29c45b1dbd 100644
--- a/tests/test_account.py
+++ b/tests/test_account.py
@@ -1,22 +1,22 @@
 # 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
 from decimal import Decimal
-from dateutil.relativedelta import relativedelta
-from trytond.pool import Pool
-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.transaction import Transaction
-from trytond.exceptions import UserError
 
+from dateutil.relativedelta import relativedelta
+
+import trytond.tests.test_tryton
+from trytond.exceptions import UserError
 from trytond.modules.account.tax import TaxableMixin
 from trytond.modules.company.tests import (
-    create_company, set_company, PartyCompanyCheckEraseMixin, CompanyTestMixin)
+    CompanyTestMixin, PartyCompanyCheckEraseMixin, create_company, set_company)
 from trytond.modules.currency.tests import create_currency
+from trytond.pool import Pool
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown, with_transaction)
+from trytond.transaction import Transaction
 
 
 def create_chart(company, tax=False, chart='account.account_template_root_en'):
diff --git a/tests/tools.py b/tests/tools.py
index d4528b6977..5530a0df7b 100644
--- a/tests/tools.py
+++ b/tests/tools.py
@@ -3,7 +3,6 @@
 import datetime
 
 from dateutil.relativedelta import relativedelta
-
 from proteus import Model, Wizard
 
 from trytond.modules.company.tests.tools import get_company