python: scp 自动传输文件; py文件中执行 linux命令

Pexpect makes Python a better tool for controlling other applications.

Pexpect is a pure Python module for spawning child applications; controlling them; and responding to expected patterns in their output. Pexpect works like Don Libes’ Expect. Pexpect allows your script to spawn a child application and control it as if a human were typing commands.
Pexpect can be used for automating interactive applications such as ssh, ftp, passwd, telnet, etc. It can be used to a automate setup scripts for duplicating software package installations on different servers. It can be used for automated software testing. Pexpect is in the spirit of Don Libes’ Expect, but Pexpect is pure Python. Unlike other Expect-like modules for Python, Pexpect does not require TCL or Expect nor does it require C extensions to be compiled. It should work on any platform that supports the standard Python pty module. The Pexpect interface was designed to be easy to use.

import multiprocessing as mp
def _scp(fname: str, host: str, port: int, remote_dir: str, user: str, password: str):
    """SSH'es to a host using the supplied credentials and executes a command.
    Throws an exception if the command doesn't return 0.
    bgrun: run command in the background"""

    if '\n' not in password:
        password = password + '\n'
    scp_cmd = 'scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -P {} -r {} {}@{}:{}'\
        .format(port, fname, user, host, remote_dir)
    x = pexpect.run(scp_cmd, events={'(?i)password': password})
    print(x)


def scp(fname: str, host: str, port: int, remote_dir: str, user: str, password: str):
    _scp(fname, host, port, remote_dir, user, password)
    pscp = mp.Process(target=_scp,
                      args=(fname, host, port, remote_dir, user, password))
    pscp.start()
scp(fname, host, port, remote_dir, user, password)

使用subprocess 在py文件中执行linux命令

## rm.py
import subprocess
cmd = 'rm ' + fname
subprocess.call(cmd, shell=True)
print('remove success')