diff --git a/tcutils/pybccclt.py b/tcutils/pybccclt.py
index 2c35317..86cf860 100644
--- a/tcutils/pybccclt.py
+++ b/tcutils/pybccclt.py
@@ -1,8 +1,8 @@
+#!/usr/bin/python
 # -*- coding: utf-8 -*-
 
 from ctypes import *
 
-bccclt_dll = None
 xpack_path = 'cpack.dat'
 
 cpack_fields = [
@@ -167,44 +167,46 @@
 "vsmess",
 "vsvarstr0",
 "vsvarstr1",
-"vsvarstr2"
+"vsvarstr2",
+"vsvarstr3"
 ]
 
-def load_bccclt():
-    global bccclt_dll
-    bccclt_dll = cdll.LoadLibrary('bccclt.dll')
-    
-  
-load_bccclt()  
 
 class pyBccclt:
     drtp_no = -1
-    
-    def setup(ip,port,xpack='cpack.dat',debug=0):
+    bccclt_dll = None
+
+    @staticmethod
+    def load_bccclt():
+        pyBccclt.bccclt_dll = cdll.LoadLibrary('bccclt.dll')
+
+    @staticmethod
+    def setup(ip, port, xpack='cpack.dat', debug=0):
         ''' 初始化 '''
+        if not pyBccclt.bccclt_dll:
+            pyBccclt.load_bccclt()
         global xpack_path
         xpack_path = xpack
-        bccclt_dll.SetDebugSwitch( debug )
-        r = bccclt_dll.BCCCLTInit(1)
+        pyBccclt.bccclt_dll.SetDebugSwitch(debug)
+        r = pyBccclt.bccclt_dll.BCCCLTInit(1)
         if not r:
             raise RuntimeError(u"初始化连接失败")
-        no = bccclt_dll.AddDrtpNode(ip,port)
+        no = pyBccclt.bccclt_dll.AddDrtpNode(ip, port)
         pyBccclt.drtp_no = no
         if pyBccclt.drtp_no < 0:
             raise RuntimeError(u'初始化通讯平台连接失败')
-            
-        
-        
-    setup = staticmethod(setup)
-        
-    def __init__(self,mainfunc):
-        self.handle = bccclt_dll.NewXpackHandle( xpack_path )
-        self.mainfunc = mainfunc
+
+    def __init__(self, mainfunc):
+        self.handle = pyBccclt.bccclt_dll.NewXpackHandle(xpack_path)
+        if isinstance(mainfunc, str) or isinstance(mainfunc, unicode):
+            self.mainfunc = int(mainfunc)
+        else:
+            self.mainfunc = mainfunc
         self.reset()
-        
+
     def get_errormsg(self):
-        return self.error_msg.value
-        
+        return self.error_msg.value.decode('gbk')
+
     def reset(self):
         self.request_row = 0
         self.error_code = c_int(0)
@@ -214,123 +216,131 @@
         self.record = None
         self.timeout = 5000
         self.response_row = 0
-        bccclt_dll.ResetPackHandle(self.handle)
-        
+        self.raw_resp = None
+        pyBccclt.bccclt_dll.ResetPackHandle(self.handle)
+
     def close(self):
-        if self.handle <> None:
-            bccclt_dll.DeleteXpackHandle( self.handle )
+        if self.handle != None:
+            pyBccclt.bccclt_dll.DeleteXpackHandle(self.handle)
             self.handle = None
-        
-    def callsvr(self,func,request,timeout = 1000):
+
+    def callsvr(self, func, request, timeout=1000):
         self.reset()
         self.timeout = timeout
-        for k,v in request.iteritems():
-            if k not in cpack_fields:
-                raise ValueError(u"字段 %s 不存在" % k)
-            
-            if isinstance(v,int):
-                bccclt_dll.SetIntFieldByName(self.handle,self.request_row,k,v)
-            elif isinstance(v,float):
-                bccclt_dll.SetDoubleFieldByName(self.handle,self.request_row,k,v)
-            elif isinstance(v,str):
-                bccclt_dll.SetStringFieldByName(self.handle,self.request_row,k,v)
-            else:
-                raise ValueError(u"字段 %s 数据类型错误" % k)
-               
-        bccclt_dll.SetRequestType(self.handle,func)
+        if request:
+            for k, v in request.iteritems():
+                if k not in cpack_fields:
+                    raise ValueError(u"字段 %s 不存在" % k)
+                if isinstance(v, int):
+                    pyBccclt.bccclt_dll.SetIntFieldByName(self.handle, self.request_row, k, v)
+                elif isinstance(v, float):
+                    pyBccclt.bccclt_dll.SetDoubleFieldByName(self.handle, self.request_row, k, v)
+                elif isinstance(v, str):
+                    pyBccclt.bccclt_dll.SetStringFieldByName(self.handle, self.request_row, k, v)
+                else:
+                    raise ValueError(u"字段 %s 数据类型错误" % k)
+
+        pyBccclt.bccclt_dll.SetRequestType(self.handle, func)
         #print "CallRequest %d:%d" % (self.mainfunc,func)
-        if not bccclt_dll.CallRequest(self.handle,pyBccclt.drtp_no,0,self.mainfunc,timeout,byref(self.error_code),self.error_msg):
+        if not pyBccclt.bccclt_dll.CallRequest(self.handle, pyBccclt.drtp_no, 0,
+            self.mainfunc, timeout, byref(self.error_code), self.error_msg):
             #print "CallRequest error "
             return False
-            
+
         self.get_return_error()
-        
         cnt = c_int(0)
-        bccclt_dll.GetRecordCount(self.handle,byref(cnt))
+        pyBccclt.bccclt_dll.GetRecordCount(self.handle, byref(cnt))
         self.record_count = cnt.value
         return True
-                
+
     def get_retcode(self):
         return self.return_code.value
-        
+
     def get_return_error(self):
-        r = bccclt_dll.GetRetCode(self.handle,byref(self.return_code))
+        r = pyBccclt.bccclt_dll.GetRetCode(self.handle, byref(self.return_code))
         if not r:
             raise RuntimeError(u'取返回码错误')
-        if self.get_retcode() <> 0:
-            bccclt_dll.GetStringFieldByName(self.handle,0,"vsmess",self.error_msg)
+        if self.get_retcode() != 0:
+            pyBccclt.bccclt_dll.GetStringFieldByName(self.handle, 0, "vsmess", self.error_msg)
         return self.return_code.value
-        
+
     def has_more_record(self):
         #print "resp:%d, record: %d" % (self.response_row , self.record_count)
         if self.response_row < self.record_count:
             return True
-        elif not bccclt_dll.HaveNextPack( self.handle ):
+        elif not pyBccclt.bccclt_dll.HaveNextPack(self.handle):
             return False
-        elif not bccclt_dll.CallNext(self.handle,self.timeout,byref(self.error_code),self.error_msg):
+        elif not pyBccclt.bccclt_dll.CallNext(self.handle, self.timeout,
+            byref(self.error_code), self.error_msg):
             raise RuntimeError(u'获取后续数据包异常')
         else:
             self.response_row = 0
             self.record_count = 0
             self.get_return_error()
-            if self.get_retcode() <> 0:
+            if self.get_retcode() != 0:
                 raise RuntimeError(u'取后续数据返回错误，ret=%d' % self.get_retcode())
             cnt = c_int(0)
-            bccclt_dll.GetRecordCount(self.handle,byref(cnt))
+            pyBccclt.bccclt_dll.GetRecordCount(self.handle, byref(cnt))
             self.record_count = cnt.value
-            if self.response_row  < self.record_count:
+            # print "next count: %d" % self.record_count
+            if self.response_row < self.record_count:
                 return True
             return False
-    
-    def convert_ascii(self,data):
+
+    def convert_ascii(self, data):
         i = 0
         datalen = len(data)
-        result = ''
+        result = []
         while i < datalen:
-            t = data[i:i+2]
-            t1 = int(t,16) & 0xFF
+            t = data[i: i + 2]
+            t1 = int(t, 16) & 0xFF
+            if t1 == 0:
+                break
             if (t1 < ord('0') or t1 > ord('9')) and (t1 < ord('A') or t1 > ord('F')):
-                raise ValueError("Value is non-hexdicimal %s:%d" % (chr(t1),t1))
-            result += chr(t1)
+                raise ValueError("Value is non-hexdicimal %s:%d" % (chr(t1), t1))
+            result.append(chr(t1))
             i += 2
-        return result
-        
-    def next_record(self,fields):
+        return "".join(result)
+
+    def next_record(self, fields):
         if self.response_row >= self.record_count:
             raise ValueError(u'无可用记录')
-        
+
         self.record = {}
         for f in fields:
             #print "获取字段 ",f
             if f not in cpack_fields:
                 raise ValueError(u"字段 %s 不存在" % f)
-            
+
             ctype_field = create_string_buffer(f)
             if f[0] == 'l':
                 v = c_int(0)
-                r = bccclt_dll.GetIntFieldByName(self.handle,self.response_row,ctype_field,byref(v))
+                r = pyBccclt.bccclt_dll.GetIntFieldByName(self.handle, self.response_row,
+                    ctype_field, byref(v))
                 if not r:
                     raise ValueError(u"字段 %s 未返回" % f)
                 self.record[f] = v.value
-            elif f[0] == 's':
+            elif f[0] == 's' or f[0] == 'v':
                 v = create_string_buffer('\000' * 512)
-                r = bccclt_dll.GetStringFieldByName(self.handle,self.response_row,ctype_field,v,511)
+                r = pyBccclt.bccclt_dll.GetStringFieldByName(self.handle, self.response_row, ctype_field, v)
                 if not r:
                     raise ValueError(u"字段 %s 未返回" % f)
                 #print "%s: %s" % (f,v.value)
                 self.record[f] = v.value
             elif f[0] == 'd':
                 v = c_double(0.0)
-                r = bccclt_dll.GetDoubleFieldByName(self.handle,self.response_row,ctype_field,byref(v))
+                r = pyBccclt.bccclt_dll.GetDoubleFieldByName(self.handle, self.response_row,
+                    ctype_field, byref(v))
                 if not r:
                     raise ValueError(u"字段 %s 未返回" % f)
                 self.record[f] = v.value
             elif f[0] == 'u':
                 v = create_string_buffer('\000' * 1024)
-                r = bccclt_dll.GetStringFieldByName(self.handle,self.response_row,ctype_field,v,1023)
+                r = pyBccclt.bccclt_dll.GetStringFieldByName(self.handle, self.response_row,
+                    ctype_field, v)
                 if not r:
                     raise ValueError(u"字段 %s 未返回" % f)
-                    
+
                 data = v.value
                 data = data[2:]
                 data = self.convert_ascii(data)
@@ -340,13 +350,31 @@
         self.response_row += 1
         #print "fetch one record , " ,self.record
         return self.record
-        
-    def fetch_record(self,fields):
+
+    def fetch_record(self, fields):
         while self.has_more_record():
             ret = self.next_record(fields)
             yield ret
-            
-    
-    
-    
-        
\ No newline at end of file
+
+    def send_raw_data(self, data, requesttype, timeout):
+        if isinstance(data, unicode):
+            data = data.encode('gbk')
+        pyBccclt.bccclt_dll.SetRawRecord(self.handle, 0, data, len(data))
+        pyBccclt.bccclt_dll.SetRequestType(self.handle, requesttype)
+        r = pyBccclt.bccclt_dll.CallRequest(self.handle, pyBccclt.drtp_no, 0,
+            self.mainfunc, timeout, byref(self.error_code), self.error_msg)
+        if not r:
+            return False
+        if self.raw_resp is None:
+            self.raw_resp = create_string_buffer(8196)
+        else:
+            memset(self.raw_resp, 0, sizeof(self.raw_resp))
+        r = pyBccclt.bccclt_dll.GetRawRecord(self.handle, 0, self.raw_resp, 8196)
+        if not r:
+            return False
+        return True
+
+    def raw_data(self):
+        if self.raw_resp is None:
+            raise ValueError(u"response is None")
+        return self.raw_resp.value