Implement an interactive shell over ssh in Python using Paramiko?

import paramikoimport reclass ShellHandler:    def __init__(self, host, user, psw):        self.ssh = paramiko.SSHClient()        self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())        self.ssh.connect(host, username=user, password=psw, port=22)        channel = self.ssh.invoke_shell()        self.stdin = channel.makefile('wb')        self.stdout = channel.makefile('r')    def __del__(self):        self.ssh.close()    def execute(self, cmd):        """        :param cmd: the command to be executed on the remote computer        :examples:  execute('ls')                    execute('finger')                    execute('cd folder_name')        """        cmd = cmd.strip('\n')        self.stdin.write(cmd + '\n')        finish = 'end of stdOUT buffer. finished with exit status'        echo_cmd = 'echo {} $?'.format(finish)        self.stdin.write(echo_cmd + '\n')        shin = self.stdin        self.stdin.flush()        shout = []        sherr = []        exit_status = 0        for line in self.stdout:            if str(line).startswith(cmd) or str(line).startswith(echo_cmd):                # up for now filled with shell junk from stdin                shout = []            elif str(line).startswith(finish):                # our finish command ends with the exit status                exit_status = int(str(line).rsplit(maxsplit=1)[1])                if exit_status:                    # stderr is combined with stdout.                    # thus, swap sherr with shout in a case of failure.                    sherr = shout                    shout = []                break            else:                # get rid of 'coloring and formatting' special characters                shout.append(re.compile(r'(\x9B|\x1B\[)[0-?]*[ -/]*[@-~]').sub('', line).                             replace('\b', '').replace('\r', ''))        # first and last lines of shout/sherr contain a prompt        if shout and echo_cmd in shout[-1]:            shout.pop()        if shout and cmd in shout[0]:            shout.pop(0)        if sherr and echo_cmd in sherr[-1]:            sherr.pop()        if sherr and cmd in sherr[0]:            sherr.pop(0)        return shin, shout, sherr