diff --git a/address.py b/address.py
index 149b51c..328ffd1 100755
--- a/address.py
+++ b/address.py
@@ -1,6 +1,6 @@
 # -*- encoding: utf-8 -*-
 #This file is part country_zip module for Tryton.
-#The COPYRIGHT file at the top level of this repository contains 
+#The COPYRIGHT file at the top level of this repository contains
 #the full copyright notices and license terms.
 
 from trytond.model import fields
@@ -19,8 +19,8 @@ DEPENDS = ['active']
 class Address:
     "Address"
     __name__ = 'party.address'
-    
-    zip = fields.Char('Zip', states=STATES, depends=DEPENDS, 
+
+    zip = fields.Char('Zip', states=STATES, depends=DEPENDS,
         on_change=['zip', 'city', 'subdivision', 'country'])
 
     @staticmethod
diff --git a/configuration.py b/configuration.py
index 68b0a75..6f45492 100644
--- a/configuration.py
+++ b/configuration.py
@@ -1,5 +1,5 @@
 #This file is part country_zip module for Tryton.
-#The COPYRIGHT file at the top level of this repository contains 
+#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.pool import PoolMeta
diff --git a/country.py b/country.py
index d74b8b1..64c5de1 100755
--- a/country.py
+++ b/country.py
@@ -1,6 +1,6 @@
 # -*- encoding: utf-8 -*-
 #This file is part country_zip module for Tryton.
-#The COPYRIGHT file at the top level of this repository contains 
+#The COPYRIGHT file at the top level of this repository contains
 #the full copyright notices and license terms.
 
 from trytond.model import ModelView, ModelSQL, fields
diff --git a/setup.py b/setup.py
index d64f11f..5f48c98 100755
--- a/setup.py
+++ b/setup.py
@@ -1,11 +1,10 @@
 #!/usr/bin/env python
 #This file is part country_zip module for Tryton.
-#The COPYRIGHT file at the top level of this repository contains 
+#The COPYRIGHT file at the top level of this repository contains
 #the full copyright notices and license terms.
 
 from setuptools import setup
 import re
-import os
 import ConfigParser
 
 config = ConfigParser.ConfigParser()