python：<type'exceptions.UnicodeEncodeError'>爲什麼會發生這種情況？

以下是完整日誌，問題是出在python：<type'exceptions.UnicodeEncodeError'>爲什麼會發生這種情況？

23    dd.append(str(msg.get_json()))

我有一些UTF-8 msg.get_json（）返回... 將STR（）儘量使用ASCII參數編碼？

<type 'exceptions.UnicodeEncodeError'> Python 2.6.5: /usr/bin/python 
Mon Nov 15 18:53:39 2010 

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred. 
/usr/lib/pymodules/python2.6/flup/server/fcgi_base.py in run(self=<flup.server.fcgi_base.Request object>) 
    556   """Runs the handler, flushes the streams, and ends the request.""" 
    557   try: 
    558    protocolStatus, appStatus = self.server.handler(self) 
    559   except: 
    560    traceback.print_exc(file=self.stderr) 
protocolStatus undefined, appStatus undefined, self = <flup.server.fcgi_base.Request object>, self.server = <flup.server.fcgi.WSGIServer object>, self.server.handler = <bound method WSGIServer.handler of <flup.server.fcgi.WSGIServer object>> 
/usr/lib/pymodules/python2.6/flup/server/fcgi_base.py in handler(self=<flup.server.fcgi.WSGIServer object>, req=<flup.server.fcgi_base.Request object>) 
1116   try: 
1117    try: 
1118     result = self.application(environ, start_response) 
1119     try: 
1120      for data in result: 
result = None, self = <flup.server.fcgi.WSGIServer object>, self.application = <function app>, environ = {'CONTENT_LENGTH': '81', 'CONTENT_TYPE': 'application/x-www-form-urlencoded; charset=UTF-8', 'DOCUMENT_ROOT': '/usr/local/nginx/html', 'DOCUMENT_URI': '/a.bc', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT': 'application/json, text/javascript, */*', 'HTTP_ACCEPT_CHARSET': 'GB2312,utf-8;q=0.7,*;q=0.7', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate', 'HTTP_ACCEPT_LANGUAGE': 'zh-cn,zh;q=0.5', 'HTTP_CACHE_CONTROL': 'no-cache', ...}, start_response = <function start_response> 
/root/bc/trunk/python/server.py in app(environ={'CONTENT_LENGTH': '81', 'CONTENT_TYPE': 'application/x-www-form-urlencoded; charset=UTF-8', 'DOCUMENT_ROOT': '/usr/local/nginx/html', 'DOCUMENT_URI': '/a.bc', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT': 'application/json, text/javascript, */*', 'HTTP_ACCEPT_CHARSET': 'GB2312,utf-8;q=0.7,*;q=0.7', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate', 'HTTP_ACCEPT_LANGUAGE': 'zh-cn,zh;q=0.5', 'HTTP_CACHE_CONTROL': 'no-cache', ...}, start_response=<function start_response>) 
    125  config.dbg(cmd_name) 
    126  if cmd_name in cmd_map: 
    127   ret = cmd_map[cmd_name](q) 
    128  else: 
    129   ret = '{"' + cmd_name + '": {"result":"error"}}'; 
ret = 'cmd=get_room_updates&room=room2&connectionid=90125080-f0a6-11df-9dcb-0800279f1ca2', global cmd_map = {'chat_message': <function chat_message_cmd>, 'enter_room': <function enter_room_cmd>, 'get_room_updates': <function get_room_updates_cmd>, 'login_user': <function login_user_cmd>, 'register_user': <function register_user_cmd>}, cmd_name = 'get_room_updates', q = {'cmd': ['get_room_updates'], 'connectionid': ['90125080-f0a6-11df-9dcb-0800279f1ca2'], 'room': ['room2']} 
/root/bc/trunk/python/server.py in get_room_updates_cmd(qs={'cmd': ['get_room_updates'], 'connectionid': ['90125080-f0a6-11df-9dcb-0800279f1ca2'], 'room': ['room2']}) 
    88   room = config.gOnlineRooms[room_name] 
    89   conn = room.chat_connections[connectionid] 
    90   remaining = conn.get_pending_message() 
    91 
    92  return remaining 
remaining = '[]', conn = <ChatConnection.ChatConnection instance>, conn.get_pending_message = <bound method ChatConnection.get_pending_message of <ChatConnection.ChatConnection instance>> 
/root/bc/trunk/python/ChatConnection.py in get_pending_message(self=<ChatConnection.ChatConnection instance>) 
    21   for msg in self.pending_message: 
    22    txt = txt + msg.get_json() + "," 
    23    dd.append(str(msg.get_json())) 
    24 
    25   config.dbg("dd = " + str(dd)) 
dd = [], dd.append = <built-in method append of list object>, builtin str = <type 'str'>, msg = <Message.Message instance>, msg.get_json = <bound method Message.get_json of <Message.Message instance>> 

<type 'exceptions.UnicodeEncodeError'>: 'ascii' codec can't encode characters in position 79-80: ordinal not in range(128) 
     args = ('ascii', u'{"id":"168", "username":"binc2", "ctime":"2010-11-15 18:53:37.165260", "body":"\u4e2d\u56fd", "room":"room2"}', 79, 81, 'ordinal not in range(128)') 
     encoding = 'ascii' 
     end = 81 
     message = '' 
     object = u'{"id":"168", "username":"binc2", "ctime":"2010-11-15 18:53:37.165260", "body":"\u4e2d\u56fd", "room":"room2"}' 
     reason = 'ordinal not in range(128)' 
     start = 79

來源

2010-11-15 Bin Chen

爲什麼你認爲你需要使用'str（）'？ – 2010-11-15 11:02:23

問題是最有可能在str(msg.get_json())或在您使用str其他地方的一個ocurring。該對象包含unicode數據，並且str不用於處理unicode。您應該可以使用json.dumps(msg.get_json())。或者使用str(msg.get_json().decode('utf-8'))。

來源

2010-11-15 11:05:59

json.dumps（）也不能處理utf-8，不幸的是 – 2010-11-15 11:57:10

@Bin Chen。文檔似乎不同意：http://docs.python.org/library/json.html – 2010-11-15 12:00:48

嘗試unicode() builtin

unicode([object[, encoding[, errors]]])

...

返回採用以下模式之一對象的Unicode字符串版本：如果沒有可選參數給出的Unicode（）將模仿str（）的行爲，除了它返回Unicode字符串而不是8位字符串。更確切地說，如果object是一個Unicode字符串或子類，它將返回該Unicode字符串，而不需要應用任何額外的解碼。

來源

2010-11-15 11:07:50 gimel

python：<type'exceptions.UnicodeEncodeError'>爲什麼會發生這種情況？

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