一个简单脚本，把第一列主机名改成第二列。

change_hostname.py

#!/bin/env python
# -*- coding: utf-8 -*-

import subprocess


text="""
test0 test10
test1 test11
"""


def shell(cmd):
    process = subprocess.Popen(args=cmd, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, shell=True)
    std_out, std_err = process.communicate()
    return_code = process.poll()
    return return_code, std_out, std_err


def _shell(cmd):
    rc , so, se = shell(cmd)
    if rc == 0:
        return so.strip()
    else:
        return se


def func(orig, dest):
    cmd = "ssh -oStrictHostKeyChecking=no %s 'sudo -i hostname %s' " % (orig, dest)
    return _shell(cmd)


def main():
    _dict = dict()
    for i in text.strip().splitlines():
        _dict[i.split()[0]] = i.split()[1]

    for i in _dict:
        print func(i, _dict[i])


if __name__ == "__main__":
    main()