python备份目录下文件夹_python实现下载Linux文件到本地?

import os
import shutil
import time
from sh import rsync
#必须要在linux才有用sh,这个库要先pip安装

def check_dir(os_dir):
        if not os.path.exists(os_dir):
                print(os_dir, "does not exist")

def ask_for_/confirm/i():
        ans = input("do you want to continue? yes/non")
        global con_exit
        if ans == "yes":
                con_exit = 0
                return con_exit
        elif ans == "no":
                con_exit = 1
                return con_exit
        else:
                print("answer with yes or no.")
                ask_for_/confirm/i()

backup_dir = input("enter directory to backupn")
check_dir(backup_dir)
print(backup_dir,"saved.")
time.sleep(3)
backup_to_dir = input("where to backup?n")
check_dir(backup_to_dir)
print("doing the bakup now!")
ask_for_/confirm/i()
if con_exit == 1:
	print("aborting the backup process!")
	exit(1)
rsync("-auhv", "--delete", "--exclude=lost+found", "--exclude=/sys", "--exclude=/tmp","--exclude=/proc","--exclude=/mnt","--exclude=/dev",backup_dir,backup_to_dir)

#exclude 排除规则，delete删除无关文件，-a存档，-u更新,-h显示帮助,-v详情