fix error about pep8 and pyflakes for travis

shadowsocks/common.py

@@ -159,12 +159,14 @@ def pack_addr(address):
         address = address[:255]  # TODO
     return b'\x03' + chr(len(address)) + address
 
+
 # add socks5 request header
 def add_header(address, port, data):
     header = b''
     header = pack_addr(address) + struct.pack('>H', port) + data
     return header
 
+
 def parse_header(data):
     addrtype = ord(data[0])
     dest_addr = None

shadowsocks/tunnel.py

@@ -24,7 +24,8 @@ import logging
 import signal
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../'))
-from shadowsocks import shell, daemon, eventloop, tcprelay, udprelay, asyncdns
+from shadowsocks import shell, daemon, eventloop, udprelay, asyncdns
+
 
 def get_tunnel_udp_server(config, dns_resolver):
     if config["dns_service"]:

shadowsocks/udprelay.py

@@ -182,7 +182,8 @@ class UDPRelay(object):
         if header_result is None:
             return
         addrtype, dest_addr, dest_port, header_length = header_result
-        logging.info("udp data to %s:%d from %s:%d" %(dest_addr, dest_port, r_addr[0], r_addr[1]))
+        logging.info("udp data to %s:%d from %s:%d" 
+            %(dest_addr, dest_port, r_addr[0], r_addr[1]))
         if self._is_local:
             server_addr, server_port = self._get_a_server()
         else:
@@ -285,7 +286,8 @@ class UDPRelay(object):
                 response = b'\x00\x00\x00' + data
         client_addr = self._client_fd_to_server_addr.get(sock.fileno())
         if client_addr:
-            logging.debug("send udp response to %s:%d" %(client_addr[0], client_addr[1]))
+            logging.debug("send udp response to %s:%d" 
+                %(client_addr[0], client_addr[1]))
             self._server_socket.sendto(response, client_addr)
         else:
             # this packet is from somewhere else we know