python 3.0 pexpect 模块的问题

Question

这是我编写的用于自动 ssh 到 linux 的一段基本代码，但每次它进入 cases==0，这意味着它每次都在思考 "newkey"/ (yes/no):

请帮我解决。我卡在基础层了

#!/home/python/Python-3.4.3/python

import subprocess;
import pexpect;


def f1_input():
        global server, id, password, commands;
        server = input("Enter Server: ");
        id = input("Enter User ID: ");
        password = input("Enter Password: ");
        commands = input("Enter Commands: ");
        return server, id, password, commands;


def f2_exec():
        child = pexpect.spawn('ssh %s@%s %s'%(id,server,commands));
        newkey = 'Are you sure you want to continue connecting (yes/no)? ';
        passkey = 'password:';
        cases = child.expect([newkey, passkey, pexpect.EOF]);
        print("cases=", cases);

        if cases==0:
                print("cases=", cases);
                child.sendline('yes');
                child.expect('password:');
                child.sendline(password);
                child.expect(pexpect.EOF);
                print(child.before);

        elif cases==1:
                print("cases=", cases);
                child.sendline(password);
                child.expect(pexpect.EOF);
                print(child.before);

        elif cases==2:
                print("cases=", cases);
                print("Timeout!!!");

        else:
                print("cases=", cases);
                print("EXIT");

f1_input();
f2_exec();

Answer 1

你的问题出在 ssh 上，应该可以毫无预料地重现。它可能无法写入 ~/.ssh/known_hosts 文件，或选项 StrictHostKeyChecking=no in ~/.ssh/config 或类似文件。

此外，您的解决方案最好使用 sshpass(1) 等程序或 paramiko 等 python 模块解决。

python 3.0 pexpect 模块的问题

Issue with python 3.0 pexpect module

python

if-statement

function

pexpect

python-3.4