diff --git a/printer_tray/__openerp__.py b/printer_tray/__openerp__.py
index da9e224..2e41571 100644
--- a/printer_tray/__openerp__.py
+++ b/printer_tray/__openerp__.py
@@ -47,7 +47,7 @@ Report to printer - Paper tray selection
  'data': [
      'users_view.xml',
      'ir_report_view.xml',
-     ],
+ ],
  'test': [],
  'installable': True,
  'auto_install': False,
diff --git a/printer_tray/ir_report.py b/printer_tray/ir_report.py
index 6181053..f787536 100644
--- a/printer_tray/ir_report.py
+++ b/printer_tray/ir_report.py
@@ -29,14 +29,15 @@ class ReportXML(orm.Model):
         'printer_tray_id': fields.many2one(
             'printing.tray', 'Paper Source',
             domain="[('printer_id', '=', printing_printer_id)]"),
-        }
+    }
 
     def set_print_options(self, cr, uid, report_id, format, context=None):
         """
         Hook to define Tray
         """
         printing_act_obj = self.pool.get('printing.report.xml.action')
-        options = super(ReportXML, self).set_print_options(cr, uid, report_id, format, context=context)
+        options = super(ReportXML, self).set_print_options(
+            cr, uid, report_id, format, context=context)
 
         # Retrieve user default values
         user = self.pool.get('res.users').browse(cr, uid, context)
@@ -54,7 +55,8 @@ class ReportXML(orm.Model):
              ('user_id', '=', uid),
              ('action', '!=', 'user_default')], context=context)
         if act_ids:
-            user_action = printing_act_obj.browse(cr, uid, act_ids[0], context=context)
+            user_action = printing_act_obj.browse(
+                cr, uid, act_ids[0], context=context)
             if user_action.tray_id:
                 tray = user_action.tray_id
 
diff --git a/printer_tray/printer.py b/printer_tray/printer.py
index 9c18f64..0185b22 100644
--- a/printer_tray/printer.py
+++ b/printer_tray/printer.py
@@ -30,8 +30,9 @@ class Printer(orm.Model):
     _inherit = 'printing.printer'
 
     _columns = {
-        'tray_ids': fields.one2many('printing.tray', 'printer_id', 'Paper Sources'),
-        }
+        'tray_ids': fields.one2many('printing.tray', 'printer_id',
+                                    'Paper Sources'),
+    }
 
     def _update_tray_option(self, db_name, uid, printer, context=None):
         """
@@ -54,12 +55,13 @@ class Printer(orm.Model):
             return
         try:
             for tray_opt in option.choices:
-                if tray_opt['choice'] not in [t.system_name for t in printer.tray_ids]:
+                if tray_opt['choice'] not in [
+                        t.system_name for t in printer.tray_ids]:
                     tray_vals = {
                         'name': tray_opt['text'],
                         'system_name': tray_opt['choice'],
                         'printer_id': printer.id,
-                        }
+                    }
 
                     tray_obj.create(cr, uid, tray_vals, context=context)
             cr.commit()
@@ -76,7 +78,8 @@ class Printer(orm.Model):
         """
         db, pool = pooler.get_db_and_pool(db_name)
         cr = db.cursor()
-        res = super(Printer, self).update_printers_status(db_name, uid, context=context)
+        res = super(Printer, self).update_printers_status(db_name, uid,
+                                                          context=context)
         try:
             connection = cups.Connection()
             printers = connection.getPrinters()
@@ -84,7 +87,9 @@ class Printer(orm.Model):
         except:
             server_error = True
 
-        printer_ids = self.search(cr, uid, [('system_name', 'in', printers.keys())], context=context)
+        printer_ids = self.search(cr, uid,
+                                  [('system_name', 'in', printers.keys())],
+                                  context=context)
         if server_error:
             vals = {'status': 'server_error'}
             self.write(cr, uid, printer_ids, vals, context=context)
@@ -95,5 +100,6 @@ class Printer(orm.Model):
         for printer in printer_list:
             # XXX we consider config of printer won't change
             if not printer.tray_ids:
-                self._update_tray_option(db_name, uid, printer, context=context)
+                self._update_tray_option(db_name, uid, printer,
+                                         context=context)
         return res
diff --git a/printer_tray/printer_tray.py b/printer_tray/printer_tray.py
index 90a90ab..cb253b9 100644
--- a/printer_tray/printer_tray.py
+++ b/printer_tray/printer_tray.py
@@ -29,5 +29,6 @@ class PrinterTray(orm.Model):
     _columns = {
         'name': fields.char('Name', size=64, required=True),
         'system_name': fields.char('System Name', size=64, required=True),
-        'printer_id': fields.many2one('printing.printer', 'Printer', required=True),
-        }
+        'printer_id': fields.many2one('printing.printer', 'Printer',
+                                      required=True),
+    }
diff --git a/printer_tray/report_xml_action.py b/printer_tray/report_xml_action.py
index 603e21b..f687a56 100644
--- a/printer_tray/report_xml_action.py
+++ b/printer_tray/report_xml_action.py
@@ -29,10 +29,11 @@ class ReportXMLAction(orm.Model):
         'printer_tray_id': fields.many2one(
             'printing.tray', 'Paper Source',
             domain="[('printer_id', '=', printer_id)]"),
-        }
+    }
 
     def behaviour(self, cr, uid, act_id, context=None):
-        res = super(ReportXMLAction, self).behaviour(cr, uid, act_id, context=context)
+        res = super(ReportXMLAction, self).behaviour(cr, uid, act_id,
+                                                     context=context)
         action = self.browse(cr, uid, act_id, context=context)
         res['tray'] = action.printer_tray_id.system_name
         return res
diff --git a/printer_tray/users.py b/printer_tray/users.py
index 7f46f76..bd30f0e 100644
--- a/printer_tray/users.py
+++ b/printer_tray/users.py
@@ -29,4 +29,4 @@ class ResUsers(orm.Model):
         'printer_tray_id': fields.many2one(
             'printing.tray', 'Default Printer Paper Source',
             domain="[('printer_id', '=', printing_printer_id)]"),
-        }
+    }