Issue with python 3.0 pexpect module
Question: Here is the piece of base code which I wrote to do an automatic ssh to the
linux, but every time it is getting into cases==0, which means it's thinking
every time it's a "newkey"/ (yes/no):

Please help me solving it. I am stuck at the basic level.

    
    
    #!/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: your problem is with ssh, and should reproduce without pexpect. It may not be
able to write to ~/.ssh/known_hosts file, or option StrictHostKeyChecking=no
in ~/.ssh/config or similar.

Furthermore, your solution is better resolved with a program such as
sshpass(1) or a python module like paramiko.

