如何在asyncssh.run上输入密码(“sudo su")并继续输入命令？

import asyncssh
import asyncio

async def run_remote_command():
    # 远程主机的IP地址和SSH端口
    host = 'remote_host'
    port = 22
    
    # 远程主机的用户名和密码
    username = 'your_username'
    password = 'your_password'
    
    try:
        # 建立SSH连接
        async with asyncssh.connect(host, port=port, username=username, password=password) as conn:
            # 输入sudo su命令
            stdin, stdout, stderr = await conn.open_session(term_type='ansi')
            await stdin.write('sudo su\n')
            await stdin.drain()
            
            # 输入密码
            await asyncio.sleep(0.5)  # 延时等待命令执行完成
            await stdin.write('your_sudo_password\n')
            await stdin.drain()
            
            # 继续输入其他命令
            await asyncio.sleep(0.5)  # 延时等待密码输入完成
            await stdin.write('your_command\n')
            await stdin.drain()
            
            # 读取命令输出
            output = await stdout.read()
            print(output)
            
    except (OSError, asyncssh.Error) as exc:
        print('SSH连接失败:', str(exc))

# 运行异步函数
asyncio.get_event_loop().run_until_complete(run_remote_command())