python - Google App Engine python - 未定义 self

Question

我有一个映射到此类 ChatMsg 的请求它接受 3 个获取变量，用户名、房间名和消息。但它在这里的最后一行失败了。

class ChatMsg(webapp.RequestHandler): # this is line 239
    def get(self):
        username = urllib.unquote(self.request.get('username'))
        roomname = urllib.unquote(self.request.get('roomname')) # this is line 242

当它尝试分配房间名称时，它告诉我:

<type 'exceptions.NameError'>: name 'self' is not defined
Traceback (most recent call last):
  File "/base/data/home/apps/chatboxes/1.341998073649951735/chatroom.py", line 239, in <module>
    class ChatMsg(webapp.RequestHandler):
  File "/base/data/home/apps/chatboxes/1.341998073649951735/chatroom.py", line 242, in ChatMsg
    roomname = urllib.unquote(self.request.get('roomname'))

self not defined 到底是怎么回事

Answer 1

这应该是一个缩进问题。回溯显示错误不在 get() 方法中。您在定义类时遇到 NameError 异常。尝试执行下面的代码，你会得到和你一样的异常。

class ChatMsg(object): # this is line 239
    def get(self):
        username = urllib.unquote(self.request.get('username'))
    roomname = urllib.unquote(self.request.get('roomname')) # this is line 242