diff --git a/beat/web/code/__init__.py b/beat/web/code/__init__.py
index cc57d1eaebcb674e758dc0c84384079f5db83fbd..d0430713a0885ceb513a520dfc6996db2cc36ed2 100644
--- a/beat/web/code/__init__.py
+++ b/beat/web/code/__init__.py
@@ -25,4 +25,4 @@
 #                                                                             #
 ###############################################################################
 
-default_app_config = 'beat.web.algorithms.apps.AlgorithmsConfig'
+default_app_config = "beat.web.algorithms.apps.AlgorithmsConfig"
diff --git a/beat/web/code/api.py b/beat/web/code/api.py
index 13ec6332210d435a3c555db39b618efa32d7daaf..7fe40cae98ba4cb3d8b7895a0bfacf08f0014298 100755
--- a/beat/web/code/api.py
+++ b/beat/web/code/api.py
@@ -26,16 +26,16 @@
 ###############################################################################
 
 from django.shortcuts import get_object_or_404
-
+from rest_framework import exceptions as drf_exceptions
 from rest_framework import generics
 from rest_framework.response import Response
-from rest_framework import exceptions as drf_exceptions
-
-from ..common.api import ShareView, RetrieveUpdateDestroyContributionView
-from ..common.serializers import DiffSerializer
 
 from ..code.models import Code
-from .serializers import CodeSharingSerializer, CodeSerializer
+from ..common.api import RetrieveUpdateDestroyContributionView
+from ..common.api import ShareView
+from ..common.serializers import DiffSerializer
+from .serializers import CodeSerializer
+from .serializers import CodeSharingSerializer
 
 
 class ShareCodeView(ShareView):
diff --git a/beat/web/code/models.py b/beat/web/code/models.py
index 39ab7702263ae5a3384fd7e227128f84c6c15af8..301baa035887c7b93517e2302fbd79fec4dee0cd 100755
--- a/beat/web/code/models.py
+++ b/beat/web/code/models.py
@@ -27,25 +27,21 @@
 
 from collections import namedtuple
 
+import simplejson
+from django.contrib.auth.models import User
 from django.db import models
 from django.db.models import Q
-from django.contrib.auth.models import User
 
+import beat.core.hash
+from beat.core.utils import extension_for_language
+
+from ..common import storage
+from ..common.exceptions import ShareError
 from ..common.models import Contribution
 from ..common.models import StoredContribution
 from ..common.models import StoredContributionManager
-from ..common.exceptions import ShareError
-from ..common import storage
-
 from ..team.models import Team
 
-from beat.core.utils import extension_for_language
-
-import beat.core.hash
-
-import simplejson
-
-
 # ----------------------------------------------------------
 
 
diff --git a/beat/web/code/serializers.py b/beat/web/code/serializers.py
index 1b585461f67bb48bc3f9584bbf6c06afe7ed114d..84ef21998d4b5e5ee216b0d3418ec4d6083b4e06 100755
--- a/beat/web/code/serializers.py
+++ b/beat/web/code/serializers.py
@@ -32,13 +32,11 @@ from rest_framework import serializers
 
 from ..common.serializers import ContributionCreationSerializer
 from ..common.serializers import ContributionModSerializer
-from ..common.serializers import SharingSerializer
 from ..common.serializers import ContributionSerializer
 from ..common.serializers import DiffSerializer
-
+from ..common.serializers import SharingSerializer
 from .models import Code
 
-
 # ----------------------------------------------------------