diff --git a/__tryton__.py b/__tryton__.py
index 6cac398e90..b43e292e57 100644
--- a/__tryton__.py
+++ b/__tryton__.py
@@ -2,7 +2,7 @@
 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
 {
-    'name' : 'Party',
+    'name': 'Party',
     'name_bg_BG': 'Партньор',
     'name_ca_ES': 'Tercers',
     'name_de_DE': 'Parteien',
@@ -11,8 +11,8 @@
     'name_fr_FR': 'Tiers',
     'name_nl_NL': 'Relaties',
     'name_ru_RU': 'Контрагенты',
-    'version' : '2.3.0',
-    'author' : 'B2CK',
+    'version': '2.3.0',
+    'author': 'B2CK',
     'email': 'info@b2ck.com',
     'website': 'http://www.tryton.org/',
     'description': 'Define parties, addresses and co.',
@@ -24,12 +24,12 @@
     'description_fr_FR': 'Définit des tiers, des adresses, etc.',
     'description_nl_NL': 'Definieert relaties, adressen en bedrijven.',
     'description_ru_RU': 'Определение контрагентов, адресов и тп.',
-    'depends' : [
+    'depends': [
         'ir',
         'res',
         'country',
     ],
-    'xml' : [
+    'xml': [
         'party.xml',
         'category.xml',
         'address.xml',
diff --git a/category.py b/category.py
index f3adf906c0..dacca4161f 100644
--- a/category.py
+++ b/category.py
@@ -52,6 +52,7 @@ class Category(ModelSQL, ModelView):
         if not ids:
             return {}
         res = {}
+
         def _name(category):
             if category.id in res:
                 return res[category.id]
diff --git a/contact_mechanism.py b/contact_mechanism.py
index 1ad7b664d5..cadee5645e 100644
--- a/contact_mechanism.py
+++ b/contact_mechanism.py
@@ -49,7 +49,7 @@ class ContactMechanism(ModelSQL, ModelView):
         'readonly': ~Eval('active', True),
         }, on_change=['website'], depends=['value', 'type', 'active']),
         'get_value', setter='set_value')
-    skype = fields.Function(fields.Char('Skype',states={
+    skype = fields.Function(fields.Char('Skype', states={
         'invisible': Eval('type') != 'skype',
         'required': Eval('type') == 'skype',
         'readonly': ~Eval('active', True),
diff --git a/party.py b/party.py
index e0b0e7fbdc..f5166bbf43 100644
--- a/party.py
+++ b/party.py
@@ -119,7 +119,8 @@ class Party(ModelSQL, ModelView):
             return []
         res = {}
         for party in self.browse(ids):
-            res[party.id] = (party.vat_country or '') + (party.vat_number or '')
+            res[party.id] = ((party.vat_country or '')
+                + (party.vat_number or ''))
         return res
 
     def search_vat_code(self, name, clause):
@@ -261,8 +262,8 @@ class PartyCategory(ModelSQL):
     _description = __doc__
     party = fields.Many2One('party.party', 'Party', ondelete='CASCADE',
             required=True, select=True)
-    category = fields.Many2One('party.category', 'Category', ondelete='CASCADE',
-            required=True, select=True)
+    category = fields.Many2One('party.category', 'Category',
+        ondelete='CASCADE', required=True, select=True)
 
 PartyCategory()
 
diff --git a/tests/test_party.py b/tests/test_party.py
index db35e84c10..358ecdc34b 100644
--- a/tests/test_party.py
+++ b/tests/test_party.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 #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 sys, os
+import sys
+import os
 DIR = os.path.abspath(os.path.normpath(os.path.join(__file__,
     '..', '..', '..', '..', '..', 'trytond')))
 if os.path.isdir(DIR):
@@ -113,6 +114,7 @@ class PartyTestCase(unittest.TestCase):
                 })
             self.assert_(party1_id)
 
+
 def suite():
     suite = trytond.tests.test_tryton.suite()
     suite.addTests(unittest.TestLoader().loadTestsFromTestCase(PartyTestCase))