使用ssh和用户名，密码，登录主机。请使用subprocess写出Python代码。不要使用sshpass

可以的，以下是Python代码：

import subprocess

host = "example.com"
username = "your_username"
password = "your_password"

command = ["ssh", f"{username}@{host}"]
process = subprocess.Popen(command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

# 输入密码
out, err = process.communicate(input=f"{password}\n".encode())
print(out.decode())