Remove python2.6 and 3.3 and fix flake8 errors

.travis.yml

@@ -1,9 +1,7 @@
 language: python
 
 python:
-  - "2.6"
   - "2.7"
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"
@@ -21,31 +19,8 @@ env:
   - DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
 matrix:
   exclude:
-    - python: "2.6"
-      env: DJANGO_VERSION='Django>=1.7,<1.8'
-    - python: "2.6"
-      env: DJANGO_VERSION='Django>=1.8,<1.9'
-    - python: "2.6"
-      env: DJANGO_VERSION='Django>=1.9,<1.10'
-    - python: "2.6"
-      env: DJANGO_VERSION='Django>=1.10,<1.11'
-    - python: "2.6"
-      env: DJANGO_VERSION='Django>=1.11,<2.0'
-    - python: "2.6"
-      env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
     - python: "2.7"
       env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
-    - python: "3.3"
-      env: DJANGO_VERSION='Django>=1.4,<1.5'
-    - python: "3.3"
-      env: DJANGO_VERSION='Django>=1.5,<1.6'
-    - python: "3.3"
-      env: DJANGO_VERSION='Django>=1.9,<1.10'
-    - python: "3.3"
-      env: DJANGO_VERSION='Django>=1.10,<1.11'
-    - python: "3.3"
-      env: DJANGO_VERSION='Django>=1.11,<2.0'
-    - python: "3.3"
       env: DJANGO_VERSION='Django>=2.0,<2.1'
     - python: "2.7"
       env: DJANGO_VERSION='Django>=2.1,<2.2'

example/app/views.py

@@ -18,12 +18,13 @@ from django import VERSION
 from django.conf import settings
 from django.contrib.auth import login
 from django.contrib.auth import get_user_model
+from django.http import HttpResponseRedirect
 
 if VERSION >= (2, 0):
     from django.urls import reverse
 else:
     from django.core.urlresolvers import reverse
-from django.http import HttpResponseRedirect
+
 
 
 def app_index(request):

example/example/urls.py

@@ -16,8 +16,13 @@
 
 from django import VERSION
 from django.conf import settings
+from django.contrib import admin
+from django.views.static import serve
+
+
 try:
     from django.conf.urls import include, url
+
     # Compatibility for Django > 1.8
     def patterns(prefix, *args):
         if VERSION < (1, 9):
@@ -34,8 +39,6 @@ except ImportError:  # Django < 1.4
         from django.conf.urls.defaults import include, patterns, url
     else:
         from django.urls import include, url
-from django.contrib import admin
-from django.views.static import serve
 
 
 admin.autodiscover()

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{26,27,33,34,35,36}-dj{14,15,16,16,17,18,19,110,111},py{34,35,36,37}-dj{14,15,16,16,17,18,19,110,111,20},py{35,36,37}-dj{21,22},
+envlist = py{27,34,35,36}-dj{14,15,16,16,17,18,19,110,111},py{34,35,36,37}-dj{14,15,16,16,17,18,19,110,111,20},py{35,36,37}-dj{21,22},
 
 [testenv]
 usedevelop = True
@@ -12,78 +12,6 @@ commands =
 install_command =
     pip install {opts} {packages}
 
-[testenv:py26-dj14]
-basepython = python2.6
-deps =
-    django==1.4.22
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj15]
-basepython = python2.6
-deps =
-    django==1.5.12
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj16]
-basepython = python2.6
-deps =
-    django==1.6.11
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj17]
-basepython = python2.6
-deps =
-    django==1.7.11
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj18]
-basepython = python2.6
-deps =
-    django==1.8.17
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj19]
-basepython = python2.6
-deps =
-    django==1.9.12
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj110]
-basepython = python2.6
-deps =
-    django==1.10.4
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py26-dj111]
-basepython = python2.6
-deps =
-    django==1.11.15
-    pillow==1.7.8
-    PyYAML==3.13
-    coveralls==0.3
-    flake8
-
 [testenv:py27-dj14]
 basepython = python2.7
 deps =
@@ -156,60 +84,6 @@ deps =
     coveralls==0.3
     flake8
 
-[testenv:py33-dj16]
-basepython = python3.3
-deps =
-    django==1.6.11
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py33-dj17]
-basepython = python3.3
-deps =
-    django==1.7.11
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py33-dj18]
-basepython = python3.3
-deps =
-    django==1.8.17
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py33-dj19]
-basepython = python3.3
-deps =
-    django==1.9.12
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py33-dj110]
-basepython = python3.3
-deps =
-    django==1.10.4
-    pillow==1.7.8
-    PyYAML==3.10
-    coveralls==0.3
-    flake8
-
-[testenv:py33-dj111]
-basepython = python3.3
-deps =
-    django==1.11.15
-    pillow==1.7.8
-    PyYAML==3.13
-    coveralls==0.3
-    flake8
-
 [testenv:py34-dj111]
 basepython = python3.4
 deps =