diff --git a/base_external_dbsource/base_external_dbsource.py b/base_external_dbsource/base_external_dbsource.py
index 9beb69e9e..888681f48 100644
--- a/base_external_dbsource/base_external_dbsource.py
+++ b/base_external_dbsource/base_external_dbsource.py
@@ -21,9 +21,14 @@
 
 import os
 import logging
+
+import psycopg2
+
 from openerp.osv import orm, fields
 from openerp.tools.translate import _
 import openerp.tools as tools
+
+
 _logger = logging.getLogger(__name__)
 
 CONNECTORS = []
@@ -62,7 +67,6 @@ except:
     _logger.info('Oracle libraries not available. Please install "cx_Oracle"\
                  python package.')
 
-import psycopg2
 CONNECTORS.append(('postgresql', 'PostgreSQL'))
 
 
diff --git a/database_cleanup/model/purge_columns.py b/database_cleanup/model/purge_columns.py
index 60b56ccc8..abcf1d2d4 100644
--- a/database_cleanup/model/purge_columns.py
+++ b/database_cleanup/model/purge_columns.py
@@ -96,8 +96,9 @@ class CleanupPurgeWizardColumn(orm.TransientModel):
         columns = list(set([
             column for model_pool in model_pools
             for column in model_pool._columns
-            if not (isinstance(model_pool._columns[column], fields.function)
-                    and not model_pool._columns[column].store)
+            if not (isinstance(model_pool._columns[column],
+                               fields.function) and
+                    not model_pool._columns[column].store)
             ]))
         columns += orm.MAGIC_COLUMNS
         columns += self.blacklist.get(model_pools[0]._table, [])
diff --git a/database_cleanup/model/purge_tables.py b/database_cleanup/model/purge_tables.py
index 8d9c86544..c108afce6 100644
--- a/database_cleanup/model/purge_tables.py
+++ b/database_cleanup/model/purge_tables.py
@@ -110,9 +110,8 @@ class CleanupPurgeWizardTable(orm.TransientModel):
             known_tables += [
                 column._sql_names(model_pool)[0]
                 for column in model_pool._columns.values()
-                if column._type == 'many2many'
+                if column._type == 'many2many' and hasattr(column, '_rel')
                 # unstored function fields of type m2m don't have _rel
-                and hasattr(column, '_rel')
                 ]
 
         # Cannot pass table names as a psycopg argument
diff --git a/email_template_dateutil/email_template.py b/email_template_dateutil/email_template.py
index 765523d3c..dab6f8a72 100644
--- a/email_template_dateutil/email_template.py
+++ b/email_template_dateutil/email_template.py
@@ -22,7 +22,6 @@
 
 from datetime import datetime
 import logging
-_logger = logging.getLogger(__name__)
 
 import pytz
 from jinja2 import contextfilter
@@ -34,6 +33,9 @@ from openerp.tools import (
 from openerp.addons.email_template import email_template
 
 
+_logger = logging.getLogger(__name__)
+
+
 @contextfilter
 def format_date(context, dtstr, new_format=None, tz=None):
     if not dtstr:
diff --git a/import_odbc/import_odbc.py b/import_odbc/import_odbc.py
index 02d2978f6..2ea5fd56c 100644
--- a/import_odbc/import_odbc.py
+++ b/import_odbc/import_odbc.py
@@ -90,15 +90,13 @@ class import_odbc_dbtable(orm.Model):
 
         def append_to_log(log, level, obj_id='', msg='', rel_id=''):
             if '_id_' in obj_id:
-                obj_id = ('.'.join(obj_id.split('_')[:-2])
-                          + ': '
-                          + obj_id.split('_')[-1])
+                obj_id = ('.'.join(obj_id.split('_')[:-2]) +
+                          ': ' + obj_id.split('_')[-1])
             if ': .' in msg and not rel_id:
                 rel_id = msg[msg.find(': .') + 3:]
                 if '_id_' in rel_id:
-                    rel_id = ('.'.join(rel_id.split('_')[:-2])
-                              + ': '
-                              + rel_id.split('_')[-1])
+                    rel_id = ('.'.join(rel_id.split('_')[:-2]) +
+                              ': ' + rel_id.split('_')[-1])
                     msg = msg[:msg.find(': .')]
             log['last_log'].append('%s|%s\t|%s\t|%s' % (level.ljust(5),
                                                         obj_id,
diff --git a/mass_editing/mass_editing.py b/mass_editing/mass_editing.py
index 1002e65c8..c0954f57f 100644
--- a/mass_editing/mass_editing.py
+++ b/mass_editing/mass_editing.py
@@ -32,8 +32,9 @@ class ir_model_fields(orm.Model):
             count=False):
         model_domain = []
         for domain in args:
-            if (len(domain) > 2 and domain[0] == 'model_id'
-                    and isinstance(domain[2], basestring)):
+            if (len(domain) > 2 and
+                    domain[0] == 'model_id' and
+                    isinstance(domain[2], basestring)):
                 model_domain += [
                     ('model_id', 'in', map(int, domain[2][1:-1].split(',')))
                 ]
@@ -109,8 +110,7 @@ class mass_object(orm.Model):
                 'model': src_obj,
                 'key2': 'client_action_multi',
                 'value': (
-                    "ir.actions.act_window,"
-                    + str(vals['ref_ir_act_window'])),
+                    "ir.actions.act_window,%s" % vals['ref_ir_act_window']),
                 'object': True,
             }, context)
         self.write(cr, uid, ids, {
diff --git a/mass_editing/wizard/mass_editing_wizard.py b/mass_editing/wizard/mass_editing_wizard.py
index e45cc9ec4..567598631 100644
--- a/mass_editing/wizard/mass_editing_wizard.py
+++ b/mass_editing/wizard/mass_editing_wizard.py
@@ -69,8 +69,8 @@ class mass_editing_wizard(orm.TransientModel):
                     etree.SubElement(xml_group, 'field', {
                         'name': field.name, 'colspan': '4', 'nolabel': '1',
                         'attrs': (
-                            "{'invisible':[('selection__"
-                            + field.name + "','=','remove_m2m')]}")})
+                            "{'invisible':[('selection__" +
+                            field.name + "','=','remove_m2m')]}")})
                 elif field.ttype == "one2many":
                     all_fields["selection__" + field.name] = {
                         'type': 'selection',
@@ -84,8 +84,8 @@ class mass_editing_wizard(orm.TransientModel):
                     etree.SubElement(xml_group, 'field', {
                         'name': field.name, 'colspan': '4', 'nolabel': '1',
                         'attrs': (
-                            "{'invisible':[('selection__"
-                            + field.name + "','=','remove_o2m')]}")})
+                            "{'invisible':[('selection__" +
+                            field.name + "','=','remove_o2m')]}")})
                 elif field.ttype == "many2one":
                     all_fields["selection__" + field.name] = {
                         'type': 'selection',
@@ -99,8 +99,8 @@ class mass_editing_wizard(orm.TransientModel):
                     etree.SubElement(xml_group, 'field', {
                         'name': field.name, 'nolabel': '1', 'colspan': '2',
                         'attrs': (
-                            "{'invisible':[('selection__"
-                            + field.name + "','=','remove')]}")})
+                            "{'invisible':[('selection__" +
+                            field.name + "','=','remove')]}")})
                 elif field.ttype == "char":
                     all_fields["selection__" + field.name] = {
                         'type': 'selection',
@@ -115,8 +115,8 @@ class mass_editing_wizard(orm.TransientModel):
                     etree.SubElement(xml_group, 'field', {
                         'name': field.name, 'nolabel': '1',
                         'attrs': (
-                            "{'invisible':[('selection__"
-                            + field.name + "','=','remove')]}"),
+                            "{'invisible':[('selection__" +
+                            field.name + "','=','remove')]}"),
                         'colspan': '2'})
                 elif field.ttype == 'selection':
                     all_fields["selection__" + field.name] = {
@@ -128,8 +128,8 @@ class mass_editing_wizard(orm.TransientModel):
                     etree.SubElement(xml_group, 'field', {
                         'name': field.name, 'nolabel': '1', 'colspan': '2',
                         'attrs': (
-                            "{'invisible':[('selection__"
-                            + field.name + "','=','remove')]}")})
+                            "{'invisible':[('selection__" +
+                            field.name + "','=','remove')]}")})
                     all_fields[field.name] = {
                         'type': field.ttype,
                         'string': field.field_description,
@@ -153,8 +153,8 @@ class mass_editing_wizard(orm.TransientModel):
                         etree.SubElement(xml_group, 'field', {
                             'name': field.name, 'colspan': '4', 'nolabel': '1',
                             'attrs': (
-                                "{'invisible':[('selection__"
-                                + field.name + "','=','remove')]}")})
+                                "{'invisible':[('selection__" +
+                                field.name + "','=','remove')]}")})
                     else:
                         all_fields["selection__" + field.name] = {
                             'type': 'selection',
@@ -167,8 +167,8 @@ class mass_editing_wizard(orm.TransientModel):
                         etree.SubElement(xml_group, 'field', {
                             'name': field.name, 'nolabel': '1',
                             'attrs': (
-                                "{'invisible':[('selection__"
-                                + field.name + "','=','remove')]}"),
+                                "{'invisible':[('selection__" +
+                                field.name + "','=','remove')]}"),
                             'colspan': '2', })
             etree.SubElement(
                 xml_form, 'separator', {'string': '', 'colspan': '4'})
diff --git a/server_environment/serv_config.py b/server_environment/serv_config.py
index 0a2447463..feb8da81b 100644
--- a/server_environment/serv_config.py
+++ b/server_environment/serv_config.py
@@ -107,8 +107,9 @@ class _Defaults(dict):
     __slots__ = ()
 
     def __setitem__(self, key, value):
-        func = lambda *a: str(value)
-        return dict.__setitem__(self, key, func)
+        return dict.__setitem__(self,
+                                key,
+                                lambda *a: str(value))
 
 
 class ServerConfiguration(orm.TransientModel):
diff --git a/users_ldap_groups/users_ldap_groups.py b/users_ldap_groups/users_ldap_groups.py
index ff0ca32aa..4e2b3ecbf 100644
--- a/users_ldap_groups/users_ldap_groups.py
+++ b/users_ldap_groups/users_ldap_groups.py
@@ -36,8 +36,8 @@ class CompanyLDAPGroupMapping(orm.Model):
         operators = []
         members = inspect.getmembers(
             users_ldap_groups_operators,
-            lambda cls: inspect.isclass(cls)
-            and cls != users_ldap_groups_operators.LDAPOperator)
+            lambda cls: (inspect.isclass(cls) and
+                         cls != users_ldap_groups_operators.LDAPOperator))
         for name, operator in members:
             operators.append((name, name))
         return tuple(operators)
diff --git a/users_ldap_mail/__openerp__.py b/users_ldap_mail/__openerp__.py
index 3c46f1736..58d89e613 100644
--- a/users_ldap_mail/__openerp__.py
+++ b/users_ldap_mail/__openerp__.py
@@ -23,7 +23,8 @@
     'name': "LDAP mapping for user name and e-mail",
     'version': "1.0",
     'depends': ["auth_ldap"],
-    'author': "Daniel Reis (https://launchpad.com/~dreis-pt),Odoo Community Association (OCA)",
+    'author': "Daniel Reis (https://launchpad.com/~dreis-pt),"
+              "Odoo Community Association (OCA)",
     'description': """\
 Allows to define the LDAP attributes to use to retrieve user name and e-mail
 address.