diff --git a/mitmproxy/controller.py b/mitmproxy/controller.py
index 81978a098..af8a77bd3 100644
--- a/mitmproxy/controller.py
+++ b/mitmproxy/controller.py
@@ -6,6 +6,7 @@ from .exceptions import Kill
 
 
 class Master(object):
+
     """
     The master handles mitmproxy's main event loop.
     """
@@ -48,6 +49,7 @@ class Master(object):
 
 
 class ServerMaster(Master):
+
     """
     The ServerMaster adds server thread support to the master.
     """
@@ -74,6 +76,7 @@ class ServerMaster(Master):
 
 
 class ServerThread(threading.Thread):
+
     def __init__(self, server):
         self.server = server
         super(ServerThread, self).__init__()
@@ -85,6 +88,7 @@ class ServerThread(threading.Thread):
 
 
 class Channel(object):
+
     """
     The only way for the proxy server to communicate with the master
     is to use the channel it has been given.
@@ -126,6 +130,7 @@ class Channel(object):
 
 
 class DummyReply(object):
+
     """
     A reply object that does nothing. Useful when we need an object to seem
     like it has a channel, and during testing.
@@ -143,6 +148,7 @@ NO_REPLY = object()
 
 
 class Reply(object):
+
     """
     Messages sent through a channel are decorated with a "reply" attribute.
     This object is used to respond to the message through the return
diff --git a/mitmproxy/dump.py b/mitmproxy/dump.py
index f1eabdb8c..8f9488bea 100644
--- a/mitmproxy/dump.py
+++ b/mitmproxy/dump.py
@@ -74,8 +74,8 @@ class DumpMaster(flow.FlowMaster):
 
         if self.server and self.server.config.http2 and not tcp.HAS_ALPN:  # pragma: no cover
             print("ALPN support missing (OpenSSL 1.0.2+ required)!\n"
-                "HTTP/2 is disabled. Use --no-http2 to silence this warning.",
-                file=sys.stderr)
+                  "HTTP/2 is disabled. Use --no-http2 to silence this warning.",
+                  file=sys.stderr)
 
         if options.filtstr:
             self.filt = filt.parse(options.filtstr)
diff --git a/mitmproxy/exceptions.py b/mitmproxy/exceptions.py
index 8f989063f..7e3e6d869 100644
--- a/mitmproxy/exceptions.py
+++ b/mitmproxy/exceptions.py
@@ -13,6 +13,7 @@ import sys
 
 
 class ProxyException(Exception):
+
     """
     Base class for all exceptions thrown by mitmproxy.
     """
@@ -22,6 +23,7 @@ class ProxyException(Exception):
 
 
 class Kill(ProxyException):
+
     """
     Signal that both client and server connection(s) should be killed immediately.
     """
@@ -37,6 +39,7 @@ class TlsProtocolException(ProtocolException):
 
 
 class ClientHandshakeException(TlsProtocolException):
+
     def __init__(self, message, server):
         super(ClientHandshakeException, self).__init__(message)
         self.server = server
@@ -67,6 +70,7 @@ class ReplayException(ProxyException):
 
 
 class ScriptException(ProxyException):
+
     @classmethod
     def from_exception_context(cls, cut_tb=1):
         """
diff --git a/mitmproxy/filt.py b/mitmproxy/filt.py
index f34969dde..6228d3646 100644
--- a/mitmproxy/filt.py
+++ b/mitmproxy/filt.py
@@ -38,6 +38,7 @@ import pyparsing as pp
 
 
 class _Token(object):
+
     def dump(self, indent=0, fp=sys.stdout):
         print("{spacing}{name}{expr}".format(
             spacing="\t" * indent,
diff --git a/mitmproxy/flow_export.py b/mitmproxy/flow_export.py
index 2ac33e152..0f3847f1c 100644
--- a/mitmproxy/flow_export.py
+++ b/mitmproxy/flow_export.py
@@ -8,6 +8,7 @@ import re
 from six.moves.urllib.parse import quote
 from six.moves.urllib.parse import quote_plus
 
+
 def curl_command(flow):
     data = "curl "
 
@@ -124,13 +125,12 @@ def locust_code(flow):
             max_wait = 3000
 """).strip()
 
-
     components = map(lambda x: quote(x, safe=""), flow.request.path_components)
     file_name = "_".join(components)
     name = re.sub('\W|^(?=\d)', '_', file_name)
     url = flow.request.scheme + "://" + flow.request.host + "/" + "/".join(components)
     if name == "" or name is None:
-        new_name = "_".join([str(flow.request.host) , str(flow.request.timestamp_start)])
+        new_name = "_".join([str(flow.request.host), str(flow.request.timestamp_start)])
         name = re.sub('\W|^(?=\d)', '_', new_name)
     args = ""
     headers = ""
diff --git a/mitmproxy/models/connections.py b/mitmproxy/models/connections.py
index 91590bcae..24cdff747 100644
--- a/mitmproxy/models/connections.py
+++ b/mitmproxy/models/connections.py
@@ -10,6 +10,7 @@ from .. import stateobject, utils
 
 
 class ClientConnection(tcp.BaseHandler, stateobject.StateObject):
+
     """
     A client connection
 
@@ -21,6 +22,7 @@ class ClientConnection(tcp.BaseHandler, stateobject.StateObject):
         timestamp_ssl_setup: TLS established timestamp
         timestamp_end: Connection end timestamp
     """
+
     def __init__(self, client_connection, address, server):
         # Eventually, this object is restored from state. We don't have a
         # connection then.
@@ -101,6 +103,7 @@ class ClientConnection(tcp.BaseHandler, stateobject.StateObject):
 
 
 class ServerConnection(tcp.TCPClient, stateobject.StateObject):
+
     """
     A server connection
 
@@ -117,6 +120,7 @@ class ServerConnection(tcp.TCPClient, stateobject.StateObject):
         timestamp_ssl_setup: TLS established timestamp
         timestamp_end: Connection end timestamp
     """
+
     def __init__(self, address, source_address=None):
         tcp.TCPClient.__init__(self, address, source_address)
 
@@ -182,7 +186,7 @@ class ServerConnection(tcp.TCPClient, stateobject.StateObject):
             timestamp_ssl_setup=None,
             timestamp_end=None,
             via=None
-    ))
+        ))
 
     def copy(self):
         return copy.copy(self)
diff --git a/mitmproxy/models/http.py b/mitmproxy/models/http.py
index 75ffbfd0a..43618ef80 100644
--- a/mitmproxy/models/http.py
+++ b/mitmproxy/models/http.py
@@ -72,9 +72,9 @@ class HTTPRequest(MessageMixin, Request):
     def get_state(self):
         state = super(HTTPRequest, self).get_state()
         state.update(
-            stickycookie = self.stickycookie,
-            stickyauth = self.stickyauth,
-            is_replay = self.is_replay,
+            stickycookie=self.stickycookie,
+            stickyauth=self.stickyauth,
+            is_replay=self.is_replay,
         )
         return state
 
@@ -109,6 +109,7 @@ class HTTPRequest(MessageMixin, Request):
 
 
 class HTTPResponse(MessageMixin, Response):
+
     """
     A mitmproxy HTTP response.
     This is a very thin wrapper on top of :py:class:`netlib.http.Response` and
@@ -124,7 +125,7 @@ class HTTPResponse(MessageMixin, Response):
             content,
             timestamp_start=None,
             timestamp_end=None,
-            is_replay = False
+            is_replay=False
     ):
         Response.__init__(
             self,
diff --git a/mitmproxy/models/tcp.py b/mitmproxy/models/tcp.py
index 7e966b95c..b87a74acf 100644
--- a/mitmproxy/models/tcp.py
+++ b/mitmproxy/models/tcp.py
@@ -6,6 +6,7 @@ from .flow import Flow
 
 
 class TCPMessage(Serializable):
+
     def __init__(self, from_client, content, timestamp=None):
         self.content = content
         self.from_client = from_client
@@ -33,6 +34,7 @@ class TCPMessage(Serializable):
 
 
 class TCPFlow(Flow):
+
     """
     A TCPFlow is a simplified representation of a TCP session.
     """
diff --git a/mitmproxy/protocol/http_replay.py b/mitmproxy/protocol/http_replay.py
index e78af074d..f7f271482 100644
--- a/mitmproxy/protocol/http_replay.py
+++ b/mitmproxy/protocol/http_replay.py
@@ -62,7 +62,7 @@ class RequestReplayThread(threading.Thread):
                         )
                         r.first_line_format = "relative"
                     else:
-                        r.first_line_format= "absolute"
+                        r.first_line_format = "absolute"
                 else:
                     server_address = (r.host, r.port)
                     server = ServerConnection(server_address, (self.config.host, 0))
diff --git a/mitmproxy/protocol/tls.py b/mitmproxy/protocol/tls.py
index 74c55ab47..5facff731 100644
--- a/mitmproxy/protocol/tls.py
+++ b/mitmproxy/protocol/tls.py
@@ -312,6 +312,7 @@ class TlsClientHello(object):
 
 
 class TlsLayer(Layer):
+
     """
     The TLS layer implements transparent TLS connections.
 
@@ -469,9 +470,9 @@ class TlsLayer(Layer):
         cert, key, chain_file = self._find_cert()
 
         if self.config.add_upstream_certs_to_client_chain:
-           extra_certs = self.server_conn.server_certs
+            extra_certs = self.server_conn.server_certs
         else:
-           extra_certs = None
+            extra_certs = None
 
         try:
             self.client_conn.convert_to_ssl(
@@ -482,7 +483,7 @@ class TlsLayer(Layer):
                 dhparams=self.config.certstore.dhparams,
                 chain_file=chain_file,
                 alpn_select_callback=self.__alpn_select_callback,
-                extra_chain_certs = extra_certs,
+                extra_chain_certs=extra_certs,
             )
             # Some TLS clients will not fail the handshake,
             # but will immediately throw an "unexpected eof" error on the first read.
diff --git a/mitmproxy/proxy/config.py b/mitmproxy/proxy/config.py
index 58b568ea8..5587e111b 100644
--- a/mitmproxy/proxy/config.py
+++ b/mitmproxy/proxy/config.py
@@ -58,7 +58,7 @@ class ProxyConfig:
             body_size_limit=None,
             mode="regular",
             upstream_server=None,
-            upstream_auth = None,
+            upstream_auth=None,
             authenticator=None,
             ignore_hosts=tuple(),
             tcp_hosts=tuple(),
@@ -120,7 +120,7 @@ def process_proxy_options(parser, options):
     body_size_limit = utils.parse_size(options.body_size_limit)
 
     c = 0
-    mode, upstream_server, upstream_auth  = "regular", None, None
+    mode, upstream_server, upstream_auth = "regular", None, None
     if options.transparent_proxy:
         c += 1
         if not platform.resolver:
@@ -161,7 +161,7 @@ def process_proxy_options(parser, options):
         options.clientcerts = os.path.expanduser(options.clientcerts)
         if not os.path.exists(options.clientcerts):
             return parser.error(
-                    "Client certificate path does not exist: %s" % options.clientcerts
+                "Client certificate path does not exist: %s" % options.clientcerts
             )
     if options.auth_nonanonymous or options.auth_singleuser or options.auth_htpasswd:
 
diff --git a/mitmproxy/tnetstring.py b/mitmproxy/tnetstring.py
index d9d61258b..acf563ac0 100644
--- a/mitmproxy/tnetstring.py
+++ b/mitmproxy/tnetstring.py
@@ -68,6 +68,7 @@ like so::
 
 """
 import six
+from collections import deque
 
 __ver_major__ = 0
 __ver_minor__ = 2
@@ -77,9 +78,6 @@ __version__ = "%d.%d.%d%s" % (
     __ver_major__, __ver_minor__, __ver_patch__, __ver_sub__)
 
 
-from collections import deque
-
-
 def dumps(value, encoding=None):
     """dumps(object,encoding=None) -> string