import os

import re

import shutil

from os.path import isdir

listnum = 0 #计数器

def get_items(path, direct_file, level=0,subindex=''):

    '''

    :param path: 文件路径，输入要处理的文件夹

    :param direct_file: 用于把找到的文件存起来的路径

    :param level: 递归层级

    :param subindex: 序号

    :return: 该文件自己的编号

    '''

    global listnum

    dirs = os.listdir(path) #获取所有的子文件夹和子文件

    subpath = [os.path.join(path, dir) for dir in dirs] #得到所有的地址

    if level==0 and os.path.exists(direct_file):#把我们要搜索的目录中去掉用来存放目标文件的文件夹

        subpath.remove(os.path.abspath(direct_file))

    for index,each_item in enumerate(subpath):

        if isdir(each_item):#是文件夹就继续调用原函数迭代

            get_items(each_item,direct_file=direct_file, level=level+1,subindex = subindex+str(index)+'.')

        else:

            basename = os.path.basename(each_item)#文件的名字

            if re.match(r'^\w+(\.pdf)$',basename) is not None:

                # 匹配以 .pdf结尾的所有文件

                newname = str(listnum)+'_'+basename

                # newname = basename

                # 重命名可以重写

                direct_file_name = os.path.join(direct_file,newname)

                if not os.path.exists(direct_file_name):

                    print('正在复制%s到%s文件夹中.....'%(basename,direct_file))

                    shutil.copyfile(each_item,direct_file_name)

                else:

                    print('%s已存在,已经跳过...'% newname)

                    pass

                listnum+=1

if __name__ == '__main__':

    '''

    '''

    path = os.getcwd()

    direct_file = './课件/'

    if not os.path.exists(direct_file):

        os.mkdir(direct_file)

    get_items(path, direct_file)