线程_multiprocessing实现文件夹copy器

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()