python - Python“builtins.TypeError:必须为str，而不是字节”-Twisted LineReceiver.sendLine()

我正在学习Twisted教程（请参见here的底部）
我正在尝试连接聊天服务器，但仍出现以下错误

File "/Users/kevin/anaconda3/lib/python3.6/site-packages/twisted/internet/tcp.py", line 1073, in doRead
    protocol.makeConnection(transport)
  File "/Users/kevin/anaconda3/lib/python3.6/site-packages/twisted/internet/protocol.py", line 510, in makeConnection
    self.connectionMade()
  File "twisted_chat.py", line 12, in connectionMade
    self.sendLine("What's your name?") <------------- This line
  File "/Users/kevin/anaconda3/lib/python3.6/site-packages/twisted/protocols/basic.py", line 635, in sendLine
    return self.transport.write(line + self.delimiter)
builtins.TypeError: must be str, not bytes

触发此错误的代码是

from twisted.internet.protocol import Factory
from twisted.protocols.basic import LineReceiver
from twisted.internet import reactor

class Chat(LineReceiver):
    def __init__(self, users):
        self.users = users
        self.name = None
        self.state = "GETNAME"

    def connectionMade(self):
        self.sendLine("What's your name?") <------- This line

    def connectionLost(self, reason):
        if self.name in self.users:
            del self.users[self.name]

我有点困惑，因为"What's your name?"显然是一个字符串，而不是字节。我使用Python3.6和Twisted17.9.0
编辑：我尝试在Python3.4中运行相同的代码，得到builtins.TypeError: Can't convert 'bytes' object to str implicitly
我一直在找，但似乎找不到解决问题的办法。有人知道我该怎么解决吗？

最佳答案

您的代码应该在Python/Anaconda v2中运行良好，但在v3中不会运行，除非您遗漏了一些代码。对于Py v3+，请使用以下任一选项：
self.sendLine( b"What's your name?" )
self.sendLine( "What's your name?".encode('utf8') )
正如您在LineReceiver.sendLine的文档中看到的，参数必须是bytes类型。