Python, Pexpect操作telnet

[艾派德迷你2]

用Python的Pexpect模块来操作
正常手动操作
1, telnet 10.1.1.2 2002
返回 Escape character is '^]'.
2.在下一行,输入? c1(这里看不见输入的字符)再回车,在当前这一行会有返回值
Escape character is '^]'.
56
3.再次输入,56会变成新的返回值

现在操作如下:

 try:
            child.sendline("? c1")
	    tt = child.readline()
            print(tt)
            child.write("? c1\r")
            tt1 = child.readline()
            print(tt1)
            child.expect('\r\n',timeout=5)
            print("\r\n\r\n Tempurature: {temp} {temp1}".format(temp = child.before,temp1 = child.after))

        except:
            msg_show("Show temp fail due to time

但是运行结果是这样的
scape character is '^]'.
? c1
'^]'.

2015-07-03 15:47:32 Show temp fail due to timeout

[艾派德迷你2]

自己搞定咯... 加咯1s延迟,并查看buffer,找到方法咯