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python文件夹copy器(多进程版)

本节的练习的要求如下:

  • 输入要拷贝文件夹的文件名称
  • 读取该文件夹下的所有文件
  • 启动5个进程来拷贝文件夹,将拷贝成功的文件名称放入队列中
  • 主进程中显示文件拷贝的进度

代码如下:

import multiprocessing
import os
import time
import random


def copy_file(q, file_name, source_folder_name, dest_folder_name):
    """拷贝文件"""
    # print("正在拷贝文件:%s,%s ==> %s" % (file_name, source_folder_name, dest_folder_name))
    f_read = open(source_folder_name + "/" + file_name, "rb")
    f_write = open(dest_folder_name + "/" + file_name, "wb")

    while True:
        content = f_read.read(1024)
        if content:
            f_write.write(content)
        else:
            break
    f_write.close()
    f_read.close()

    time.sleep(random.random())

    # 放入已经拷贝完成的文件
    q.put(file_name)


def main():
    # 获取要复制的文件夹名称
    source_folder_name = input("请输入要复制的文件夹名称:")

    # 目标文件夹
    dest_folder_name = source_folder_name + "[副本]"

    if not os.path.exists(dest_folder_name):
        os.mkdir(dest_folder_name)

    # 获取文件夹中的所有普通文件名
    file_names = os.listdir(source_folder_name)

    # 创建Queue
    q = multiprocessing.Manager().Queue()

    # 创建pool
    po = multiprocessing.Pool(5)

    for file_name in file_names:
        po.apply_async(copy_file, args=(q, file_name, source_folder_name, dest_folder_name))

    po.close()

    all_file_num = len(file_names)
    copy_ok_num = 0

    while True:

        file_name = q.get()
        copy_ok_num += 1
        print("\r拷贝的进度为:%.2f%%" % (copy_ok_num * 100 / all_file_num), end="")

        if copy_ok_num >= all_file_num:
            break

    print("")


if __name__ == "__main__":
    main()

posted @ 2018-12-20 22:17  coder-qi  阅读(592)  评论(0编辑  收藏  举报