diff --git a/manager/admin.py b/manager/admin.py
index 8c38f3f..846f6b4 100644
--- a/manager/admin.py
+++ b/manager/admin.py
@@ -1,3 +1 @@
-from django.contrib import admin
-
 # Register your models here.
diff --git a/manager/models.py b/manager/models.py
index 71a8362..6b20219 100644
--- a/manager/models.py
+++ b/manager/models.py
@@ -1,3 +1 @@
-from django.db import models
-
 # Create your models here.
diff --git a/manager/views.py b/manager/views.py
index 54b1a04..5c4ec8f 100644
--- a/manager/views.py
+++ b/manager/views.py
@@ -6,8 +6,6 @@
 from users.models import BusinessAgent, Artist
 from django.contrib.auth.models import User
 from django.views.generic import ListView, TemplateView, UpdateView, CreateView
-from bson import json_util
-from bson.json_util import dumps
 from django.core.urlresolvers import reverse
 from users.business_logic import (
     register_business_agent, update_business_agent
diff --git a/tracks/serializers.py b/tracks/serializers.py
index dd39cc5..c020909 100644
--- a/tracks/serializers.py
+++ b/tracks/serializers.py
@@ -38,30 +38,35 @@ class Meta:
             'artist_id'
         )
 
+    @classmethod
     def get_image(self, obj):
         try:
             return obj.image.url
         except:
             return None
 
+    @classmethod
     def get_url(self, obj):
         try:
             return obj.file.url
         except:
             return None
 
+    @classmethod
     def get_gender(self, obj):
         try:
             return obj.gender.name
         except:
             return None
 
+    @classmethod
     def get_artist(self, obj):
         try:
             return obj.artist.user.username
         except:
             return None
 
+    @classmethod
     def get_artist_id(self, obj):
         try:
             return obj.artist.id
diff --git a/tracks/tests.py b/tracks/tests.py
index 7ce503c..a39b155 100644
--- a/tracks/tests.py
+++ b/tracks/tests.py
@@ -1,3 +1 @@
-from django.test import TestCase
-
 # Create your tests here.
diff --git a/tracks/trace_manager.py b/tracks/trace_manager.py
index 82c87b6..9c4367b 100644
--- a/tracks/trace_manager.py
+++ b/tracks/trace_manager.py
@@ -2,7 +2,6 @@
 from django.contrib.gis.geoip2 import GeoIP2
 import time
 import os
-import json
 
 
 class TraceManager:
diff --git a/tracks/views.py b/tracks/views.py
index 971cc6f..4c2d4ca 100644
--- a/tracks/views.py
+++ b/tracks/views.py
@@ -1,5 +1,4 @@
 from rest_framework.generics import ListAPIView, CreateAPIView
-from rest_framework.viewsets import ModelViewSet
 from .models import Track, Top
 from .serializers import TrackSerializer,  TopSerializer, TrackUploadSerializer
 from rest_framework import filters
diff --git a/users/business_logic.py b/users/business_logic.py
index d492bc3..3eb73fa 100644
--- a/users/business_logic.py
+++ b/users/business_logic.py
@@ -7,11 +7,9 @@
 from django.core.mail import send_mail
 
 
-'''
-    get_info_users
-    Este médodo permite retornar todos los usuarios
-    Param: GET.
-'''
+#     get_info_users
+#     Este médodo permite retornar todos los usuarios
+#     Param: GET.
 
 
 def get_info_users(request):
@@ -26,11 +24,9 @@ def get_info_users(request):
         return users
 
 
-'''
-    user_to_json
-    Este médodo permite transformar un usuario en json
-    Param: usuario.
-'''
+#     user_to_json
+#     Este médodo permite transformar un usuario en json
+#     Param: usuario.
 
 
 def user_to_json(user):
@@ -43,11 +39,9 @@ def user_to_json(user):
     return json_data
 
 
-'''
-    register_user_in_model
-    Este médodo permite registrar un usuario
-    Param: datos del usuario.
-'''
+#     register_user_in_model
+#     Este médodo permite registrar un usuario
+#     Param: datos del usuario.
 
 
 def register_user_in_model(json_data):
@@ -94,11 +88,9 @@ def register_user_in_model(json_data):
     return {'status': status}
 
 
-'''
-    str_to_bool
-    Este médodo permite transformar un str a bool
-    Param: str
-'''
+#     str_to_bool
+#     Este médodo permite transformar un str a bool
+#     Param: str
 
 
 def str_to_bool(s):
@@ -110,11 +102,9 @@ def str_to_bool(s):
         raise ValueError
 
 
-'''
-    relation_user_to_artist
-    Este médodo permite asociar al modelo de usuario, el perfil de un artista.
-    Param: usuario, datos del perfil
-'''
+#     relation_user_to_artist
+#     Este médodo permite asociar al modelo de usuario, el perfil delartista.
+#     Param: usuario, datos del perfil
 
 
 def relation_user_to_artist(user_model, json_data):
@@ -149,11 +139,9 @@ def relation_user_to_artist(user_model, json_data):
     return True
 
 
-'''
-    login_service
-    Este médodo permite registrar un usuario
-    Param: datos del usuario.
-'''
+#     login_service
+#     Este médodo permite registrar un usuario
+#     Param: datos del usuario.
 
 
 def login_service(request):
@@ -172,16 +160,14 @@ def login_service(request):
     return {'status': status}
 
 
-'''
-    login_user_to_json
-    Este médodo permite transformar un usuario autenticado en json
-    Param: usuario.
-'''
+#     login_user_to_json
+#     Este médodo permite transformar un usuario autenticado en json
+#     Param: usuario.
 
 
 def login_user_to_json(user):
     try:
-        artist = Artist.objects.get(user__id=user.id)
+        Artist.objects.get(user__id=user.id)
         is_artist = True
     except:
         is_artist = False
diff --git a/users/models.py b/users/models.py
index aa65f0c..0c9f2d7 100644
--- a/users/models.py
+++ b/users/models.py
@@ -70,6 +70,7 @@ class TokenUser(models.Model):
 
     token = models.CharField(max_length=10, blank=True, null=True)
 
+    @classmethod
     def get_token(self):
         chars = string.ascii_letters + string.digits
         token = ''.join(choice(chars) for i in range(10))
diff --git a/users/urls.py b/users/urls.py
index 114924d..e69e8cd 100644
--- a/users/urls.py
+++ b/users/urls.py
@@ -1,4 +1,4 @@
-from django.conf.urls import url, include
+from django.conf.urls import url
 from . import views
 
 urlpatterns = [
diff --git a/users/views.py b/users/views.py
index f447884..ca51a88 100644
--- a/users/views.py
+++ b/users/views.py
@@ -1,15 +1,13 @@
 import json
 from django.http import JsonResponse
 from django.views.decorators.csrf import csrf_exempt
-from django.shortcuts import render, redirect
+from django.shortcuts import redirect
 from django.core.urlresolvers import reverse
 from users.business_logic import (
     register_user_in_model, get_info_users, login_service,
     request_password_restore_action, change_password_action,
     update_profile_action, change_password_op_action
 )
-from django.contrib.auth.models import User
-from django.contrib.auth import authenticate, login
 from rest_framework.generics import CreateAPIView
 from .models import Donation, Artist
 from .serializers import DonationSerializer, ArtistSerializer
@@ -17,14 +15,10 @@
 from rest_framework import filters
 from rest_framework.generics import ListAPIView, RetrieveAPIView
 
-from django.utils.decorators import method_decorator
-from django.contrib.auth.decorators import login_required
 
-'''
-    user
-    Servicio REST para el manejo de usuarios.
-    Param: GET, POST, PUT, DELETE
-'''
+#     user
+#     Servicio REST para el manejo de usuarios.
+#     Param: GET, POST, PUT, DELETE
 
 
 @csrf_exempt
diff --git a/web/admin.py b/web/admin.py
index 8c38f3f..846f6b4 100644
--- a/web/admin.py
+++ b/web/admin.py
@@ -1,3 +1 @@
-from django.contrib import admin
-
 # Register your models here.
diff --git a/web/models.py b/web/models.py
index 71a8362..6b20219 100644
--- a/web/models.py
+++ b/web/models.py
@@ -1,3 +1 @@
-from django.db import models
-
 # Create your models here.
diff --git a/web/tests.py b/web/tests.py
index 7ce503c..a39b155 100644
--- a/web/tests.py
+++ b/web/tests.py
@@ -1,3 +1 @@
-from django.test import TestCase
-
 # Create your tests here.