Remove django 1.9 support and fix PEP8

.travis.yml

@@ -3,15 +3,11 @@ language: python
 
 matrix:
   include:
-    - python: 2.7
-      env: TOXENV=py27-django19
     - python: 2.7
       env: TOXENV=py27-django110
     - python: 2.7
       env: TOXENV=py27-django111
 
-    - python: 3.4
-      env: TOXENV=py34-django19
     - python: 3.4
       env: TOXENV=py34-django110
     - python: 3.4
@@ -19,8 +15,6 @@ matrix:
     - python: 3.4
       env: TOXENV=py34-django20
 
-    - python: 3.5
-      env: TOXENV=py35-django19
     - python: 3.5
       env: TOXENV=py35-django110
     - python: 3.5

django_migration_linter/migration_linter.py

@@ -43,7 +43,8 @@ class MigrationLinter(object):
         self.include_apps = kwargs.get('include_apps', None)
         self.exclude_apps = kwargs.get('exclude_apps', None)
         self.database = kwargs.get('database', None) or 'default'
-        self.python_exe = '{0}/bin/{1}'.format(sys.prefix, 'python') if hasattr(sys, 'real_prefix') else 'python'
+        self.python_exe = '{0}/bin/{1}'.format(sys.prefix, 'python') if \
+            hasattr(sys, 'real_prefix') else 'python'
 
         # Initialise counters
         self.nb_valid = 0

setup.py

@@ -28,7 +28,7 @@ install_requirements = [
 test_requirements = [
     'pytest',
     'tox',
-    'django>=1.9',
+    'django>=1.10',
     'django-fake-database-backends',
 ]
 
@@ -59,7 +59,6 @@ setup(
         'Intended Audience :: Developers',
         'Environment :: Web Environment',
         'Framework :: Django',
-        'Framework :: Django :: 1.9',
         'Framework :: Django :: 1.10',
         'Framework :: Django :: 1.11',
         'Framework :: Django :: 2.0',

tox.ini

@@ -1,6 +1,5 @@
 [tox]
 envlist =
-    py{27,34,35}-django19
     py{27,34,35}-django110
     py{27,34,35,36}-django111
     py{34,35,36}-django20
@@ -11,7 +10,6 @@ commands = py.test {posargs}
 extras = test
 pip_pre = true
 deps =
-    django19: django>=1.9,<1.10
     django110: django>=1.10,<1.11
     django111: django>=1.11,<2.0
     django20: django>=2.0