diff --git a/src/plonemeeting/portal/core/__init__.py b/src/plonemeeting/portal/core/__init__.py
index 613a5690..776bf455 100644
--- a/src/plonemeeting/portal/core/__init__.py
+++ b/src/plonemeeting/portal/core/__init__.py
@@ -4,10 +4,12 @@
 
 import logging
 
+
 logger = logging.getLogger("plonemeeting.portal.core")
 
 from plonemeeting.portal.core import patches  # NOQA
 
+
 assert patches  # workaround for pyflakes issue #13, NOQA
 
 _ = MessageFactory("plonemeeting.portal.core")
diff --git a/src/plonemeeting/portal/core/content/meeting.py b/src/plonemeeting/portal/core/content/meeting.py
index 895bfe53..c64e0a56 100644
--- a/src/plonemeeting/portal/core/content/meeting.py
+++ b/src/plonemeeting/portal/core/content/meeting.py
@@ -1,15 +1,16 @@
 # -*- coding: utf-8 -*-
 from Acquisition import aq_base
-from Products.CMFCore.utils import getToolByName
 from plone.app.textfield import RichText
 from plone.autoform import directives as form
 from plone.dexterity.content import Container
-from plone.folder.interfaces import IOrdering, IOrderableFolder
+from plone.folder.interfaces import IOrderableFolder
+from plone.folder.interfaces import IOrdering
 from plone.folder.unordered import UnorderedOrdering
 from plone.supermodel import model
 from plonemeeting.portal.core import _
 from plonemeeting.portal.core.content.item import IItem
 from Products.CMFCore.permissions import ManagePortal
+from Products.CMFCore.utils import getToolByName
 from Products.CMFPlone import PloneMessageFactory as plone_
 from zope import schema
 from zope.component import adapter
diff --git a/src/plonemeeting/portal/core/content/publication.py b/src/plonemeeting/portal/core/content/publication.py
index c2052a7e..84ebdeeb 100644
--- a/src/plonemeeting/portal/core/content/publication.py
+++ b/src/plonemeeting/portal/core/content/publication.py
@@ -1,7 +1,7 @@
 from AccessControl import ClassSecurityInfo
 from collective.timestamp.behaviors.timestamp import ITimestampableDocument
-from DateTime import DateTime
 from collective.timestamp.interfaces import ITimeStamper
+from DateTime import DateTime
 from imio.helpers import EMPTY_DATETIME
 from imio.helpers.content import object_values
 from plone import api
diff --git a/src/plonemeeting/portal/core/patches.py b/src/plonemeeting/portal/core/patches.py
index 424f3331..fd618a3f 100644
--- a/src/plonemeeting/portal/core/patches.py
+++ b/src/plonemeeting/portal/core/patches.py
@@ -1,13 +1,13 @@
 # -*- coding: utf-8 -*-
-import logging
-
 from plonemeeting.portal.core import logger
+from Products.CMFPlone.resources import utils
+from Products.CMFPlone.resources.utils import get_resource
 from Products.PortalTransforms.transforms import safe_html
 from Products.PortalTransforms.transforms.safe_html import CSS_COMMENT
 from Products.PortalTransforms.transforms.safe_html import decode_htmlentities
 
-from Products.CMFPlone.resources import utils
-from Products.CMFPlone.resources.utils import get_resource
+import logging
+
 
 original_hasScript = safe_html.hasScript
 
diff --git a/src/plonemeeting/portal/core/rest/meeting.py b/src/plonemeeting/portal/core/rest/meeting.py
index fe16902a..051d8c8f 100644
--- a/src/plonemeeting/portal/core/rest/meeting.py
+++ b/src/plonemeeting/portal/core/rest/meeting.py
@@ -1,9 +1,8 @@
 from Acquisition import aq_parent
-from Products.CMFCore.utils import getToolByName
 from plone.restapi.interfaces import IJsonCompatible
-
 from plonemeeting.portal.core.rest.base import PublicAPIView
 from plonemeeting.portal.core.rest.interfaces import IItemSerializeToJson
+from Products.CMFCore.utils import getToolByName
 from zope.component import queryMultiAdapter
 
 
diff --git a/src/plonemeeting/portal/core/rest/serializers.py b/src/plonemeeting/portal/core/rest/serializers.py
index c182747f..45e8634a 100644
--- a/src/plonemeeting/portal/core/rest/serializers.py
+++ b/src/plonemeeting/portal/core/rest/serializers.py
@@ -3,8 +3,8 @@
 from plone.restapi.interfaces import IFieldSerializer
 from plone.restapi.serializer.converters import json_compatible
 from plonemeeting.portal.core.rest.interfaces import IInstitutionSerializeToJson
-from plonemeeting.portal.core.rest.interfaces import IMeetingSerializeToJson
 from plonemeeting.portal.core.rest.interfaces import IItemSerializeToJson
+from plonemeeting.portal.core.rest.interfaces import IMeetingSerializeToJson
 from zope.component import adapter
 from zope.component import queryMultiAdapter
 from zope.interface import implementer
diff --git a/src/plonemeeting/portal/core/rest/site.py b/src/plonemeeting/portal/core/rest/site.py
index 3f9bc495..8830a5dd 100644
--- a/src/plonemeeting/portal/core/rest/site.py
+++ b/src/plonemeeting/portal/core/rest/site.py
@@ -3,14 +3,14 @@
 from plone.memoize import ram
 from plone.protect.interfaces import IDisableCSRFProtection
 from plone.restapi.interfaces import ISerializeToJson
-from plonemeeting.portal.core.cache import published_institutions_modified_cachekey
 from plonemeeting.portal.core import logger
+from plonemeeting.portal.core.cache import published_institutions_modified_cachekey
 from plonemeeting.portal.core.config import DEMO_INSTITUTION_IDS
 from plonemeeting.portal.core.config import LOCATIONS_API_URL
 from plonemeeting.portal.core.config import REGION_INS_CODE
+from plonemeeting.portal.core.rest.base import PublicAPIView
 from plonemeeting.portal.core.rest.interfaces import IInstitutionSerializeToJson
 from Products.Five.browser import BrowserView
-from plonemeeting.portal.core.rest.base import PublicAPIView
 from zope.component import getUtility
 from zope.component import queryMultiAdapter
 from zope.interface import alsoProvides
diff --git a/src/plonemeeting/portal/core/widgets/colorselect.py b/src/plonemeeting/portal/core/widgets/colorselect.py
index 1da3b970..170e21e0 100644
--- a/src/plonemeeting/portal/core/widgets/colorselect.py
+++ b/src/plonemeeting/portal/core/widgets/colorselect.py
@@ -1,16 +1,17 @@
 # -*- coding: utf-8 -*-
+from z3c.form.browser import widget
 from z3c.form.browser.text import TextWidget
 from z3c.form.browser.widget import HTMLTextInputWidget
 from z3c.form.interfaces import IFieldWidget
 from z3c.form.interfaces import IFormLayer
 from z3c.form.interfaces import IWidget
-from z3c.form.widget import FieldWidget, Widget
+from z3c.form.widget import FieldWidget
+from z3c.form.widget import Widget
 from zope.component import adapter
 from zope.interface import implementer
 from zope.interface import implementer_only
 from zope.schema.interfaces import IField
 
-from z3c.form.browser import widget
 
 class IColorSelectWidget(IWidget):
     """Marker interface"""