diff --git a/fluent/sender.py b/fluent/sender.py
index a49dae1..38580ef 100644
--- a/fluent/sender.py
+++ b/fluent/sender.py
@@ -1,32 +1,28 @@
-import os
-import sys, urllib
 import msgpack
 import socket
 import threading
-import json
 import time
 
-global_sender = None
+_global_sender = None
 
 def setup(tag, **kwargs):
-    host = ('host' in kwargs) and kwargs['host'] or 'localhost'
-    port = ('port' in kwargs) and kwargs['port'] or 24224
+    host = kwargs.get('host', 'localhost')
+    port = kwargs.get('port', 24224)
 
-    global global_sender
-    global_sender = FluentSender(tag, host=host, port=port)
+    global _global_sender
+    _global_sender = FluentSender(tag, host=host, port=port)
 
 def get_global_sender():
-    global global_sender
-    return global_sender
+    return _global_sender
 
 class FluentSender(object):
     def __init__(self,
-           tag,
-           host='127.0.0.1',
-           port=24224,
-           bufmax=1*1024*1024,
-           timeout=3.0,
-           verbose=False):
+                 tag,
+                 host='localhost',
+                 port=24224,
+                 bufmax=1*1024*1024,
+                 timeout=3.0,
+                 verbose=False):
 
         self.tag = tag
         self.host = host
@@ -64,9 +60,9 @@ def _close(self):
         self.socket = None
 
     def _make_packet(self, label, data):
-        tag = "%s.%s" % (self.tag, label)
-        cur_time = int(time.mktime(time.localtime()))
-        packet = [ tag, cur_time, data ]
+        tag = '.'.join(self.tag, label)
+        cur_time = int(time.time())
+        packet = (tag, cur_time, data)
         if self.verbose:
             print packet
         return self.packer.pack(packet)
@@ -89,17 +85,11 @@ def _send_internal(self, bytes):
             self._reconnect()
 
             # send message
-            total = len(bytes)
-            nsent = 0
-            while nsent < total:
-                n = self.socket.send(bytes[nsent:])
-                if n <= 0:
-                    raise RuntimeError("socket connection broken")
-                nsent += n
+            self.socket.sendall(bytes)
 
             # send finished
             self.pendings = None
-        except:
+        except Exception:
             # close socket
             self._close()
             # clear buffer if it exceeds max bufer size