diff --git a/.travis.yml b/.travis.yml
index 4349f2d..566a1ab 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,4 +10,4 @@ install:
 script:
   - "python secret_key_gen.py"
   - "python manage.py migrate"
-  - "flake8 --count --exclude ./docs,./manage_room/diff_match_patch,./manage_room/migrations,./manage_chat/migrations"
+  - "flake8 --count --ignore=E501,E302,W293,F841 --exclude ./docs,./manage_room/diff_match_patch,./manage_room/migrations,./manage_chat/migrations,./manage.py"
diff --git a/coding_night_live/consumers.py b/coding_night_live/consumers.py
index 8ed1d62..6a327a6 100644
--- a/coding_night_live/consumers.py
+++ b/coding_night_live/consumers.py
@@ -1,6 +1,6 @@
 import json
 
-from channels import Channel, Group
+from channels import Channel
 from channels.auth import channel_session_user_from_http, channel_session_user
 
 from manage_room.models import Room
@@ -11,11 +11,13 @@ def ws_connect(message):
     message.reply_channel.send({'accept': True})
     message.channel_session['room'] = []
 
+
 def ws_receive(message):
     payload = json.loads(message['text'])
     payload['reply_channel'] = message.content['reply_channel']
     Channel('room.receive').send(payload)
 
+
 @channel_session_user
 def ws_disconnect(message):
     for room_label in message.channel_session.get("room", set()):
@@ -24,4 +26,3 @@ def ws_disconnect(message):
             room.websocket_group.discard(message.reply_channel)
         except Room.DoesNotExist:
             pass
-
diff --git a/coding_night_live/routing.py b/coding_night_live/routing.py
index 9a3aad8..0a6e5d1 100644
--- a/coding_night_live/routing.py
+++ b/coding_night_live/routing.py
@@ -10,17 +10,7 @@
 channel_routing = [
     # /Room/
     include("coding_night_live.routing.websocket_routing", path=r"^/room/"),
-    #include("manage_room.routing.websocket_routing", path=r"^/room/user_count/"),
     include("manage_room.routing.custom_routing"),
     # /Chat/
-    #include("manage_chat.routing.websocket_routing", path=r"^/talk/"),
     include("manage_chat.routing.custom_routing"),
 ]
-
-"""
-websocket_routing = [
-    route("websocket.connect", ws_connect),
-    route("websocket.receive", ws_receive),
-    route("websocket.disconnect", ws_disconnect),
-]
-"""
diff --git a/coding_night_live/settings.py b/coding_night_live/settings.py
index d6dd4d6..338b9c1 100644
--- a/coding_night_live/settings.py
+++ b/coding_night_live/settings.py
@@ -29,6 +29,7 @@
 with open(secret_file, 'r') as f:
     secret = json.loads(f.read())
 
+
 def get_secret(setting, secret=secret):
     try:
         return secret[setting]
@@ -36,6 +37,7 @@ def get_secret(setting, secret=secret):
         error_msg = "Set the {0} environment variable".format(setting)
         raise ImproperlyConfigured(error_msg)
 
+
 SECRET_KEY = get_secret('SECRET_KEY')
 
 # SECURITY WARNING: don't run with debug turned on in production!
@@ -81,7 +83,7 @@ def get_secret(setting, secret=secret):
 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [os.path.join(BASE_DIR, 'templates'),],    # templates DIR
+        'DIRS': [os.path.join(BASE_DIR, 'templates'), ],    # templates DIR
         'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [
@@ -103,9 +105,9 @@ def get_secret(setting, secret=secret):
 
 # django social auth setting
 SOCIALACCOUNT_PROVIDERS = \
-    { 'google':
-        { 'SCOPE': ['profile', 'email'],
-          'AUTH_PARAMS': { 'access_type': 'online' } }}
+    {'google':
+        {'SCOPE': ['profile', 'email'],
+         'AUTH_PARAMS': {'access_type': 'online'}}}
 
 # Database
 # https://docs.djangoproject.com/en/1.10/ref/settings/#databases
@@ -117,7 +119,8 @@ def get_secret(setting, secret=secret):
     }
 }
 
-redis_host = os.environ.get('REDIS_HOST', 'localhost')    # redis host definition
+# redis host definition
+redis_host = os.environ.get('REDIS_HOST', 'localhost')
 
 # channel layer definitions
 CHANNEL_LAYERS = {
@@ -187,4 +190,4 @@ def get_secret(setting, secret=secret):
 # https://docs.djangoproject.com/en/1.10/howto/static-files/
 
 STATIC_URL = '/static/'
-STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static'), ]    #static files DIR
+STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static'), ]    # static files DIR
diff --git a/coding_night_live/views.py b/coding_night_live/views.py
index e9765a7..6c54f67 100644
--- a/coding_night_live/views.py
+++ b/coding_night_live/views.py
@@ -1,5 +1,4 @@
-from django.shortcuts import render_to_response, render, redirect
-from django.template import RequestContext
+from django.shortcuts import render
 
 from django.http import HttpResponseRedirect
 from django.views.generic.base import TemplateView
@@ -7,6 +6,7 @@
 # Create your views here.
 class MainView(TemplateView):
     template_name = 'main.html'
+    
     def dispatch(self, request, *args, **kwargs):
         if request.user.is_authenticated():
             return HttpResponseRedirect('/services/')
diff --git a/manage_chat/admin.py b/manage_chat/admin.py
index 22297d1..b6a3944 100644
--- a/manage_chat/admin.py
+++ b/manage_chat/admin.py
@@ -11,6 +11,7 @@ class PollAdmin(admin.ModelAdmin):
 class ChatAndReplyAdmin(admin.ModelAdmin):
     list_display = ('room', '_id', 'time', 'description', 'hash_value', 'is_reply')
 
+
 admin.site.register(Notice, NoticeAdmin)
 admin.site.register(Poll, PollAdmin)
 admin.site.register(ChatAndReply, ChatAndReplyAdmin)
diff --git a/manage_chat/consumers.py b/manage_chat/consumers.py
index 4bdacc5..df75ae7 100644
--- a/manage_chat/consumers.py
+++ b/manage_chat/consumers.py
@@ -2,10 +2,8 @@
 import json
 
 from django.db import transaction
-from channels import Channel, Group
-from channels.auth import channel_session_user_from_http, channel_session_user
+from channels.auth import channel_session_user
 
-from manage_room.models import Room
 from manage_room.consumers import check_admin
 from manage_room.utils import get_room_or_error, catch_client_error
 
diff --git a/manage_chat/models.py b/manage_chat/models.py
index 0137f7e..11168e0 100644
--- a/manage_chat/models.py
+++ b/manage_chat/models.py
@@ -16,7 +16,7 @@ def _createHash():
     return hash.hexdigest()[:7]
 
 class Notice(models.Model):
-    room = models.ForeignKey(Room, on_delete=models.CASCADE)    #fk
+    room = models.ForeignKey(Room, on_delete=models.CASCADE)
     _id = models.AutoField(primary_key=True)
     time = models.DateTimeField(default=timezone.now)
     description = models.TextField()
@@ -65,10 +65,10 @@ def websocket_group(self):
     
     def start_poll(self, label):
         final_msg = {
-                'start_poll': label,
-                'question': self.question,
-                'answer': self.answer,
-                'hash_value': self.hash_value,
+            'start_poll': label,
+            'question': self.question,
+            'answer': self.answer,
+            'hash_value': self.hash_value,
         }
         self.websocket_group.send(
             {"text": json.dumps(final_msg)}
@@ -76,11 +76,11 @@ def start_poll(self, label):
     
     def result_poll(self, label):
         final_msg = {
-                'result_poll': label,
-                'question': self.question,
-                'hash_value': self.hash_value,
-                'answer': self.answer,              # json list
-                'answer_count': self.answer_count,  # json list
+            'result_poll': label,
+            'question': self.question,
+            'hash_value': self.hash_value,
+            'answer': self.answer,              # json list
+            'answer_count': self.answer_count,  # json list
         }
         self.websocket_group.send(
             {"text": json.dumps(final_msg)}
diff --git a/manage_chat/routing.py b/manage_chat/routing.py
index 21ae40e..cb29ec7 100644
--- a/manage_chat/routing.py
+++ b/manage_chat/routing.py
@@ -1,13 +1,6 @@
 from channels import route
 from .consumers import new_chat, new_notice, new_poll, end_poll, get_poll
 
-#websocket_routing = [
-#    route("websocket.connect", ws_connect),
-#    route("websocket.receive", ws_receive),
-#    route("websocket.disconnect", ws_disconnect),
-#]
-
-# Websocket command :
 custom_routing = [
     route("room.receive", new_chat, command="^new_chat$"),
     route("room.receive", new_notice, command="^notice$"),
diff --git a/manage_chat/tests.py b/manage_chat/tests.py
deleted file mode 100644
index 7ce503c..0000000
--- a/manage_chat/tests.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.
diff --git a/manage_chat/views.py b/manage_chat/views.py
index e9b4b0b..1fe23f0 100644
--- a/manage_chat/views.py
+++ b/manage_chat/views.py
@@ -1,7 +1,3 @@
-import json
-
-from django.shortcuts import render
-
 from .models import ChatAndReply, Notice, Poll
 from manage_room.models import Room
 
@@ -24,7 +20,7 @@ def get_notice_list(request):
     return notices
 
 def get_poll_list(request):
-    #request is room's label
+    # request is room's label
     room = Room.objects.get(label=request)
 
     polls = Poll.objects.filter(room=room).order_by('time')
diff --git a/manage_room/admin.py b/manage_room/admin.py
index e782dd7..b13bd97 100644
--- a/manage_room/admin.py
+++ b/manage_room/admin.py
@@ -8,5 +8,6 @@ class RoomAdmin(admin.ModelAdmin):
 class SlideAdmin(admin.ModelAdmin):
     list_display = ('title', 'md_blob', 'now_id', 'next_id')
 
+
 admin.site.register(Room, RoomAdmin)
 admin.site.register(Slide, SlideAdmin)
diff --git a/manage_room/consumers.py b/manage_room/consumers.py
index 35472e7..ee4081f 100644
--- a/manage_room/consumers.py
+++ b/manage_room/consumers.py
@@ -3,8 +3,8 @@
 
 from django.db import transaction
 from django.core.cache import cache
-from channels import Channel, Group
-from channels.auth import channel_session_user_from_http, channel_session_user
+from channels import Group
+from channels.auth import channel_session_user
 
 from .models import Room, Slide
 
@@ -14,27 +14,13 @@
 from .diff_match_patch.java_hashcode_conv import javaHash
 from .diff_match_patch import diff_match_patch
 
-### Chat channel handling ###
-
-# Channel_session_user loads the user out from the channel session and presents
-# it as message.user. There's also a http_session_user if you want to do this on
-# a low-level HTTP handler, or just channel_session if all you want is the
-# message.channel_session object without the auth fetching overhead.
+# Chat channel handling
 @channel_session_user
 @catch_client_error
 def room_join(message):
-    # Find the room they requested (by ID) and add ourselves to the send group
-    # Note that, because of channel_session_user, we have a message.user
-    # object that works just like request.user would. Security!
     room = get_room_or_error(message["room"])
-
-    # OK, add them in. The websocket_group is what we'll send messages
-    # to so that everyone in the chat room gets them.
     room.websocket_group.add(message.reply_channel)
-    #message.channel_session['room'] = list(set(message.channel_session['room']).union([room.label]))
-    # Send a message back that will prompt them to open the room
-    # Done server-side so that we could, for example, make people
-    # join rooms automatically.
+
     message.reply_channel.send({
         "text": json.dumps({
             "join": str(room.label),
@@ -60,7 +46,7 @@ def room_leave(message):
     room = get_room_or_error(message["room"])
 
     room.websocket_group.discard(message.reply_channel)
-    #message.channel_session['room'] = list(set(message.channel_session['room']).difference([room.label]))
+    # message.channel_session['room'] = list(set(message.channel_session['room']).difference([room.label]))
     # Send a message back that will prompt them to close the room
     message.reply_channel.send({
         "text": json.dumps({
@@ -103,7 +89,8 @@ def del_slide(message):
     if check_admin(message):
         room = get_room_or_error(message["room"])
         is_last = Slide.objects.filter(room=room).count()
-        if is_last <=2:
+
+        if is_last <= 2:
             raise ClientError("CANNOT_DELETE_LAST")
         else:
             with transaction.atomic():
@@ -322,7 +309,7 @@ def check_admin(message):
     is_admin = False
     if not message.user.is_anonymous():
         try:
-            check_admin = Room.objects.get(admin_user=message.user, label=message["room"])
+            admin = Room.objects.get(admin_user=message.user, label=message["room"])
             is_admin = True
         except:
             pass
diff --git a/manage_room/models.py b/manage_room/models.py
index f8c95e3..6828ba1 100644
--- a/manage_room/models.py
+++ b/manage_room/models.py
@@ -1,5 +1,4 @@
 import json
-import allauth
 
 from django.db import models
 from django.utils import timezone
@@ -9,12 +8,12 @@
 # Create your models here.
 
 class Room(models.Model):
-    admin_user = models.ForeignKey(User, on_delete=models.CASCADE)  #fk
-    #admin_user = models.ForeignKey('auth.User', on_delete=models.CASCADE)
-    #admin_user = models.ForeignKey(allauth.socialaccount.models.SocialAccount, on_delete=models.CASCADE)
+    admin_user = models.ForeignKey(User, on_delete=models.CASCADE)
+    # admin_user = models.ForeignKey('auth.User', on_delete=models.CASCADE)
+    # admin_user = models.ForeignKey(allauth.socialaccount.models.SocialAccount, on_delete=models.CASCADE)
     
     title = models.CharField(max_length=255, default="NoTitle")
-    link = models.URLField(primary_key=True)    #pk
+    link = models.URLField(primary_key=True)
     time = models.DateTimeField(default=timezone.now)
 
     label = models.SlugField(unique=True)
@@ -34,7 +33,7 @@ def send_title(self, new_title):
         self.title = new_title
         self.save()
 
-        final_msg = {'rename_title': str(self.label), 'title': str(self.title),}
+        final_msg = {'rename_title': str(self.label), 'title': str(self.title), }
 
         self.websocket_group.send(
             {"text": json.dumps(final_msg)}
@@ -44,10 +43,10 @@ class Slide(models.Model):
     room = models.ForeignKey(Room, on_delete=models.CASCADE)
     title = models.CharField(max_length=35, default="Unnamed slide")
     md_blob = models.TextField(default="")
-    #id linked list
-    now_id = models.AutoField(primary_key=True)     #pk
-    next_id = models.PositiveSmallIntegerField(default=0) #if 0: last element
-    #next_id = models.PositiveSmallIntegerField(unique=True) #if 0: last element
+    # id ; linked list
+    now_id = models.AutoField(primary_key=True)
+    next_id = models.PositiveSmallIntegerField(default=0)   # if 0: last element
+    # next_id = models.PositiveSmallIntegerField(unique=True) # if 0: last element
 
     def __str__(self):
         return str(self.now_id)
@@ -61,7 +60,7 @@ def websocket_group(self):
         return Group(self.room.label)
     
     def send_idx(self, command):
-        final_msg = {command: str(self.now_id),}    # Return idx
+        final_msg = {command: str(self.now_id), }    # Return idx
 
         self.websocket_group.send(
             {"text": json.dumps(final_msg)}
diff --git a/manage_room/tests.py b/manage_room/tests.py
deleted file mode 100644
index 7ce503c..0000000
--- a/manage_room/tests.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.
diff --git a/manage_room/utils.py b/manage_room/utils.py
index 4d91499..9356b56 100644
--- a/manage_room/utils.py
+++ b/manage_room/utils.py
@@ -18,7 +18,6 @@ def inner(message, *args, **kwargs):
     return inner
 
 
-#def get_room_or_error(room_label, user):
 def get_room_or_error(room_label):
     """
     Tries to fetch a room for the user, checking permissions along the way.
diff --git a/manage_room/views.py b/manage_room/views.py
index 84362cd..26f761f 100644
--- a/manage_room/views.py
+++ b/manage_room/views.py
@@ -1,13 +1,10 @@
 # /services/list.html - manage the room (create, delete, ..)
-import random
+from django.http import HttpResponse, HttpResponseRedirect
 
-from django.http import HttpResponse, HttpResponseRedirect, HttpRequest
-
-from django.shortcuts import render, get_object_or_404
+from django.shortcuts import render
 from django.db import transaction
 from django.views.generic.base import TemplateView
 from django.contrib.sites.models import Site
-from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib.auth.decorators import login_required
 
 from haikunator import Haikunator
@@ -21,7 +18,7 @@
 def RoomCreateView(request):
     url = 'http://' + Site.objects.get_current().domain + '/'
     room = None
-
+    
     while not room:
         with transaction.atomic():
             share_link = Haikunator.haikunate()  # Ex) 'icy-dream-4198'
@@ -69,7 +66,7 @@ def MarkdownToPdfView(request, label):
 
 
 class RedirectRoomView(TemplateView):
-    template_name='room.html'
+    template_name = 'room.html'
     
     def get_context_data(self, **kwargs):
         label = self.request.path
@@ -111,7 +108,7 @@ def get_context_data(self, **kwargs):
         is_admin = False
         if not self.request.user.is_anonymous():
             try:
-                check_admin = Room.objects.get(label=label, admin_user=self.request.user)  #check admin user
+                admin = Room.objects.get(label=label, admin_user=self.request.user)  # check admin user
                 is_admin = True
             except:
                 # Matching query does not exist - request.user is not a admin_user