python3 中的 pexpect.expect() 抛出错误 "must be in str , not bytes"

Question

我正在将我的代码迁移到 python 3.4.3。此代码在 python 2.4.3 中运行良好。但这里它在 python 3.4.3 中抛出错误。我应该使用与 expect 不同的东西吗？这是我得到错误的代码片段：

   telconn=pexpect.spawn('telnet 10.24.12.83')
    telconn.logfile = sys.stdout
    login=telconn.expect([":","key to proceed.",">"])
    if login==0:
        telconn.send("user1" + "\r")
        telconn.expect(":")
        telconn.send("paswd1" + "\r\r\r\r\n\n\n")
        login1=telconn.expect([">","key to proceed."])
        if login1==0:
            print("nothing")
        elif login1==1:
            telconn.expect("key to proceed.")
            telconn.send ("[=13=]3")
            telconn.expect(">")
    if login==1:
        telconn.send ("[=13=]3")
        telconn.expect(">")
        print("ctlc")
    elif login==2:
        telconn.send("\n\r")
        telconn.expect(">")

我得到的错误是：

Traceback (most recent call last):
  File "cleanup1.py", line 128, in <module>
    Connect()
  File "cleanup1.py", line 53, in Connect
    login=telconn.expect([":","key to proceed.",">"])
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/spawnbase.py", line 315, in expect
    timeout, searchwindowsize, async)
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/spawnbase.py", line 339, in expect_list
    return exp.expect_loop(timeout)
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/expect.py", line 97, in expect_loop
    incoming = spawn.read_nonblocking(spawn.maxread, timeout)
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/pty_spawn.py", line 455, in read_nonblocking
    return super(spawn, self).read_nonblocking(size)
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/spawnbase.py", line 157, in read_nonblocking
    self._log(s, 'read')
  File "/corp/global/install-dependent/python/3.4.3/lib/python3.4/site-packages/pexpect/spawnbase.py", line 115, in _log
    self.logfile.write(s)
TypeError: must be str, not bytes

Answer 1

将第 53 行更改为

login1=telconn.expect(">"+"key to proceed.")

Answer 2

pexpect 想要记录字节，而不是解码的字符串。你可以让它这样做：

telconn.logfile = sys.stdout.buffer

sys.stdout 默认为期望字符串。内部缓冲区对字节很满意。

Answer 3

从这个 bug report 开始，您应该使用 spawnu 而不是 spawn 来编写 unicode 而不是字节。您可能不知道 spawn 使用二进制日志文件，而 spawnu 使用 unicode 日志文件。

Answer 4

接受的答案是正确的，因为您当前正在尝试记录字节而不是字符串。但至少从 pexpect 版本 4.6 开始，你可以 provide the encoding argument to spawn。所以使用：

telconn=pexpect.spawn('telnet 10.24.12.83', encoding='utf-8')

然后与衍生终端的所有通信都使用 utf-8 自动解码，您将能够使用 telconn.logfile = sys.stdout。

python3 中的 pexpect.expect() 抛出错误 "must be in str , not bytes"

pexpect.expect() in python3 is throwing error as "must be in str , not bytes"

python

pexpect

python-3.x