import multiprocessing

import os

import time

import random

def copy_file(queue,file_name,source_folder_name,dest_folder_name):

    f_read = open(source_folder_name+"/"+file_name,"rb")

    f_write = open(source_folder_name+"/"+file_name,"wb")

    while True:

        time.sleep(random.random())

        content = f_read.read(1024)

        if content:

            f_write.write(content)

        else:

            break

    f_read.close()

    f_write.close()

    # 发送已经拷贝完毕的文件名字

    queue.put(file_name)

def main():

    # 获取要复制的文件夹

    source_folder_name = input("请输入要复制的文件夹名字:")

    # 整理目标文件夹

    dest_folder_name = source_folder_name + "副本"

    # 创建目标文件夹

    try:

        os.mkdir(dest_folder_name)#创建文件夹

    except:

        pass

    # 获取这个文件夹中所有的普通文件名

    file_names = os.listdir(source_folder_name)

    # 创建Queue

    queue = multiprocessing.Manager().Queue()

    # 创建线程池

    pool = multiprocessing.Pool(3)

    for file_name in file_names:

        # 向线程池中添加任务

        pool.apply_async(copy_file,args=(queue,file_name,source_folder_name,dest_folder_name))#不堵塞执行

        # 主进程显示进度

        pool.close()

        all_file_num = len(file_names)

        while True:

            file_name = queue.get()

            if file_name in file_names:

                file_names.remove(file_name)

            copy_rate = (all_file_num - len(file_names)) * 100 / all_file_num

            print("\r%.2f...(%s)" % (copy_rate, file_name) + " " * 50, end="")

            if copy_rate >= 100:

                break

        print()

if __name__ == "__main__":

            main()