diff --git a/.travis.yml b/.travis.yml
index 9db2c769..c4cc57ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ install:
 - python setup.py install
 - pip install flake8
 - pip install pytest
-before_script: flake8 sanic
+before_script: flake8 --max-line-length=120 sanic
 script: py.test -v tests
 deploy:
   provider: pypi
diff --git a/sanic/__init__.py b/sanic/__init__.py
index 5b893df4..b7be9aaf 100644
--- a/sanic/__init__.py
+++ b/sanic/__init__.py
@@ -1,2 +1,4 @@
 from .sanic import Sanic
 from .blueprints import Blueprint
+
+__all__ = ['Sanic', 'Blueprint']
diff --git a/sanic/blueprints.py b/sanic/blueprints.py
index 506c2e90..b3b40df9 100644
--- a/sanic/blueprints.py
+++ b/sanic/blueprints.py
@@ -53,7 +53,6 @@ class Blueprint:
         """
         self.deferred_functions.append(func)
 
-
     def make_setup_state(self, app, options):
         """
         """
@@ -96,4 +95,3 @@ class Blueprint:
             self.record(lambda s: s.add_exception(handler, *args, **kwargs))
             return handler
         return decorator
-
diff --git a/sanic/request.py b/sanic/request.py
index ece1ae8f..85dcad46 100644
--- a/sanic/request.py
+++ b/sanic/request.py
@@ -80,7 +80,7 @@ class Request:
     @property
     def files(self):
         if self.parsed_files is None:
-            _ = self.form  # compute form to get files
+            self.form  # compute form to get files
 
         return self.parsed_files
 
diff --git a/sanic/response.py b/sanic/response.py
index f26254f5..3ca5a9ad 100644
--- a/sanic/response.py
+++ b/sanic/response.py
@@ -19,16 +19,16 @@ STATUS_CODES = {
 class HTTPResponse:
     __slots__ = ('body', 'status', 'content_type', 'headers')
 
-    def __init__(self, body=None, status=200, headers=[], content_type='text/plain', body_bytes=b''):
+    def __init__(self, body=None, status=200, headers=None, content_type='text/plain', body_bytes=b''):
         self.content_type = content_type
 
-        if not body is None:
+        if body is not None:
             self.body = body.encode('utf-8')
         else:
             self.body = body_bytes
 
         self.status = status
-        self.headers = headers
+        self.headers = headers or {}
 
     def output(self, version="1.1", keep_alive=False, keep_alive_timeout=None):
         # This is all returned in a kind-of funky way
@@ -39,7 +39,10 @@ class HTTPResponse:
 
         headers = b''
         if self.headers:
-            headers = b''.join(b'%b: %b\r\n' % (name.encode(), value.encode('utf-8')) for name, value in self.headers.items())
+            headers = b''.join(
+                b'%b: %b\r\n' % (name.encode(), value.encode('utf-8'))
+                for name, value in self.headers.items()
+            )
         return b'HTTP/%b %d %b\r\nContent-Type: %b\r\nContent-Length: %d\r\nConnection: %b\r\n%b%b\r\n%b' % (
             version.encode(),
             self.status,
@@ -52,6 +55,7 @@ class HTTPResponse:
             self.body
         )
 
+
 def json(body, status=200, headers=None):
     return HTTPResponse(ujson.dumps(body), headers=headers, status=status,
                         content_type="application/json; charset=utf-8")
diff --git a/sanic/router.py b/sanic/router.py
index ddab5c61..cbae0292 100644
--- a/sanic/router.py
+++ b/sanic/router.py
@@ -94,7 +94,7 @@ class Router:
                 break
 
         if route:
-            if route.methods and not request.method in route.methods:
+            if route.methods and request.method not in route.methods:
                 raise InvalidUsage("Method {} not allowed for URL {}".format(request.method, request.url),
                                    status_code=405)
             return route.handler, args, kwargs
@@ -120,7 +120,7 @@ class SimpleRouter:
     def get(self, request):
         route = self.routes.get(request.url)
         if route:
-            if route.methods and not request.method in route.methods:
+            if route.methods and request.method not in route.methods:
                 raise InvalidUsage("Method {} not allowed for URL {}".format(request.method, request.url),
                                    status_code=405)
             return route.handler, [], {}
diff --git a/sanic/sanic.py b/sanic/sanic.py
index 50a5a803..154aac15 100644
--- a/sanic/sanic.py
+++ b/sanic/sanic.py
@@ -63,7 +63,6 @@ class Sanic:
         Decorates and registers middleware to be called before a request
         can either be called as @app.middleware or @app.middleware('request')
         """
-        middleware = None
         attach_to = 'request'
 
         def register_middleware(middleware):
@@ -80,11 +79,6 @@ class Sanic:
             attach_to = args[0]
             return register_middleware
 
-        if isinstance(middleware, FunctionType):
-            middleware = Middleware(process_request=middleware)
-
-        return middleware
-
     def register_blueprint(self, blueprint, **options):
         """
         Registers a blueprint on the application.